Gear vendors th400

GEAR VENDORS provides an overdrive product to race cars and trucks up to 2,000 hp. This product is particularly well suited to the special demands of Drag We...

Gear Vendors overdrive units are available for Powerglide, TH350, and TH400 transmissions. In most GM applications, installing a Gear Vendors unit requires little to no modification to the trans ...55 Tony Discussion starter. 1538 posts · Joined 2018. #1 · Dec 3, 2019. I have a lead on a used Gear Vendor bolted to a working th400 for $1200. I did want a 4L80E. I really don't need the split shifting although might have fun with it. Main goal is the overdrive. Any idea if it will require tunnel work in a 55 Chevy?The cost and installation trouble of a Gear Vendor setup really is only justified with a big block, and only then if driven hard pretty often. TH350 and Gear Vendors probably shouldn't be mentioned in the same sentence. They are just a strength mismatch. On the other hand putting a GV behind a TH400 is the most common way to use a GV.Thinking About A Gear Vendors Overdrive... This would be for my '69 SS with a 496/TH400 with a 3.73 rear. This would be for next year, but I would need to start saving now. Right now at 60mph, I'm turning around 3100 rpm. With the 496 being quite the gas pig, and gas prices being what they are, this modification has been on my mind more …GM Manual Transmissions Muncie M21/M22 (Also M20 and BW T-10) Gear Vendors owes a lot to the Muncie close ratio trans. These words are very similar for the M20 and T10 but with some slight ratio differences depending on model.All M21/22 have the same 22% upshift and 28% downshift spread as the Gear Vendors. Overdrive … Continue reading GM 4-Speed Manual →Gear Vendors offers a high performance overdrive for GM 2-3 speed automatic transmissions that handle more horsepower, deliver bigger gains, and install easier than any other overdrive. Learn how gear-splitting, overdrive cruising, and overdrive performance can enhance your muscle car or hot rod experience with a Gear Vendors.

GM Manual Transmissions Muncie M21/M22 (Also M20 and BW T-10) Gear Vendors owes a lot to the Muncie close ratio trans. These words are very similar for the M20 and T10 but with some slight ratio differences depending on model.All M21/22 have the same 22% upshift and 28% downshift spread as the Gear Vendors. Overdrive … Continue reading …The Gear Vendors unit is essentially a separate automatic gearbox that, with a simple bolt-on dedicated. adapter, gives the stock tranny two personalities, effectively doubling its gear ratios throughout the entire range. So instead of having a beefy three-speed Turbo 400 you actually get an equally tough six-speed!4L80 or gear vendors w/ THM400. Thanks for your responses on the earlier post. I have narrowed down my choices to replace my Super T-10 4 speed in my 1969 Camaro to a 4L80 (with a full manual valve body and no electronics) or a THM 400 full manual valve body w/ a gear vendors unit behind it. It's about $600 to $800 more for the …GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186 TH400 SPEEDO By SEO Agency San Diego Themes. Reprint from Hot Rodding Magazine, September 2008. The gear Vendors overdrive kit for the Turbo 400 had everything we needed to add a pleasant 0.78 overdrive to our big-block ’68 Chevelle. The kit costs $2,595 (PN 3D0400AFS), and includes everything except labor and a shortened driveshaft. At $4.27 per gallon for 91 octane premium unleaded ... GM 4-Speed Automatics 700R4/4L60E/4L80E There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton and car applications, and the heavy duty 4L80E in the heavier applications. 700R4/4L60E’s have a low 3.06 first gear which is good for initial take off but this makes the transmission have the widest ratio … Continue …Gear Vendor O/D install with TH-400. After years of thinking about an overdrive and which one to get I opted for the Gear Vendor. I always had a TH-400 in the car and I always liked it. Only reason I …TH400 - Custom Car Shop Transmission & Drivetrain Transmission Transmissions Automatic Transmissions GM TH400

GM 4-Speed Automatics 700R4/4L60E/4L80E There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton and car applications, and the heavy duty 4L80E in the heavier applications. 700R4/4L60E’s have a low 3.06 first gear which is good for initial take off but this makes the transmission have the widest ratio … Continue …CHEVY GM TH400 GEAR VENDOR OVERDRIVE ADAPTER. TRANSACTION TRANS PARTS EMPORIUM (566) 98% positive; Seller's other items Seller's other items; Contact seller; US $575.00. No Interest if paid in full in 6 mo on $99+ with PayPal Credit * ... “GOOD USED THM400 TO GEAR VENDORS ADAPTER” ...Gearvendors offers auxiliary transmissions with ratio splitting and overdrive features for racing cars, trucks, RVs, and hot rods. Learn how Gearvendors can improve your performance, economy, and emissions …Muscle Cars / Hot Rods GEAR VENDORS can give your GM / Dodge / Ford vehicle up to twice the forward gear ratios, unparalleled performance and the ultimate in horsepower handling of any auxiliary transmission. There is no competing underdrive or overdrive transmission available on the market that will give you the performance of a … Continue reading Muscle Car/Hot Rod →TH400-03 - GM Chevy Turbo 400 TH400 Transmission Gear Vendors Adapter (Good Used) T19-01. T19-01 - Ford T19 Transmission Gear Vendors Adapter (Good Used) 1356-BOY. 1356 BOY - Ford BW1356 Transfer Case Gear Vendors Adapter Bolt on Yoke (Good Used) NP205S-01.The kit, which retails for $2,495.00, includes a TH400, Streetmaster torque converter, trans mount, dipstick, transmission cooler, and a case of fluid. Follow along as we swap out the old trans ...

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Watch the tips and tricks as we install a Gear Vendors Over Drive in Brads 1971 Camaro. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $350.00. transmart4x4usainc (1,294) 100%. Buy It Now. Free shipping.If you’re a fan of pierogies, you know that this traditional Eastern European dish can be a comforting and delicious treat. But where can you find the best and most unique pierogie...Automatic 3-Speed TH 400 – 4″ Tailhousing – Mechanical Speedo.Replaces 4″ tailhousing.To replace 4L60E with aftermarket mechancal speedometer.

Unlike, EFI setting up and tuning the 4L80E is extremely simple if you buy the right controller. For example, you will be able to set up the 4L80E to match your rear tire diameter and final drive ratio. Likewise, the 4L80E uses a precise TPS sensor to read engine load. Not a vacuum modulator or TV cable.2 posts · Joined 2003. #1 · Jun 14, 2006. I have a 1972 Chevelle with a TH400 trans behind a 396 and am trying to put in a 4L80E. I have a 1997 Chevy truck with a solid transmission in it, harness and computer as a donor for the swap. I am pretty sure that I will have to get a new chip in the computer and modify the drive shaft.2nd would be a TH350 with the gear vendors. The gear vendors website has some good info. They consider the 700r4/480LE trans to be less sturdy than even the TH350. They do push the advantage of using the GV unit for gear splitting with a 4-speed auto trans, because the giant steps the 700R4 takes from one gear to the next is the …Watch the tips and tricks as we install a Gear Vendors Over Drive in Brads 1971 Camaro.Learn how to add overdrive to your TH400 transmission with a Gear Vendors overdrive unit that can handle up to 4,000 horsepower and is easy to install. The unit lowers the RPM by at least 800 rpm and requires no real modifications to the crossmember and tunnel.Planning a wedding can be an exciting and joyous time, but it can also be stressful and overwhelming. From finding the perfect venue to selecting the most delicious cake, there are...The car uses a Rossler TH400 three-speed automatic connected to a Gear Vendors overdrive. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4.56:1.The Gear Vendors unit is essentially a separate automatic gearbox that, with a simple bolt-on dedicated. adapter, gives the stock tranny two personalities, effectively doubling its gear ratios throughout the entire range. So instead of having a beefy three-speed Turbo 400 you actually get an equally tough six-speed!

Gear Vendors TH400 Under/Overdrive With 4" Tailhousing This supplemental planetary gearbox adapts to the output shaft of your existing transmission to provide an extra gear of 0.78 :1. The initial benefit is the addition of a 22% overdrive in high gear, but because it can be engaged in any gear, it doubles the number of ratios available in any ...

GM 3-Speed Automatic Truck/Motorhome With the GEAR VENDORS dashswitch in “auto” you will have automatic overdrive just like the vehicle came with a factory system. The GEAR VENDORS will shift on and off without attention of the driver and can be used while towing up to combined weights of 30,000 lbs. An interactive floorswitch is … Continue reading GM 3-Speed Automatic Truck/Motorhome →I put a Gear Vendors in my 72 short bed K10, th400 15 years ago. The installation was easy, just measure up the driveshaft length, I had to shorten the rear driveshaft a bit and it worked fine. I left the angles alone, kept it simple and it has worked GREAT for 15 years. ... Gear Vendors sent me a users/technical manual for a small fee, …Gear Vendors OD unit. This is a complete set up for a TH400 transmission. It's as close to brand new as you can find. The car it was on was converted from manual to auto with the OD unit. Once it was finished it was engaged once, then he decided to switch back to manual. It is a 100% complete set up plus the $150 electric speedo. Over $2800 ...Coyote Direct in association with Hughes Performance brings you the best TH400 swap kit on the market. This is a complete kit that will allow you to successfully convert your automatic or manual transmission to a TH400 transmission. ... -Hughes Extreme Heavy Duty TH400, Stock case, 1+2 Billet Transbrake, 2.48/1.48 GM gear set, 2000FWHP rating ...The TH400 platform is the best option for the LS Turbo T400 Transmission swap and perfect for Turbo 400 4x4 swaps & upgrades into Nissan Patrols and stadium trucks etc. These High qualtiy Turbo 400 Transmissions for sale Australia and available here in Melbourne and we ship Australia wide. 11 Products Found. Sort. SKU: TCI-FMST3.Apr 9, 2006 · The 700 or 4L60 have terrible gear spacing for drag racing. For somebody just wanting to cruise around and not beat on their car the 700/4L60 works fine. A 2004R is a better transmission because it's stronger and has better gear spacing. After that a TH400 and Gear Vendor is the way to go. Feb 16, 2012 · The Gear Vendors essentially makes my th400 into a five speed transmission. Below is a approximate cost of my endeavor. I only made this thread for other people who might consider going this same route. FTI stage 4 TH400 $1930. FTI 3400 converter $900. New drive shaft $300. Gear Vendors $2750. Total cost: $5880. Part II covers wiring the Gear Vendor.Some simply adjust to the ignominy of life without overdrive, while others bolt on a Gear Vendors assembly to the tailshift. Either option works just fine, but the 4L85E combines the best of both worlds. Essentially a TH400 with overdrive and more rugged internals, the GM 4L85E is the ultimate automatic.GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186 ← Application Guide ← Installation

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The Gear Vendors essentially makes my th400 into a five speed transmission. Below is a approximate cost of my endeavor. I only made this thread for other people who might consider going this same route. FTI stage 4 TH400 $1930. FTI 3400 converter $900. New drive shaft $300. Gear Vendors $2750. Total cost: $5880.Nov 29, 2018 · The install is not as straight forward as I thought. Just more wiring than I realized. Nothing bad. I also bought a G-Force cross-member that is "Supposed" to be made for the TH-400 and the gear Vendor unit - Model: RCAE-GV. I have read so many posts about the trouble with the GV fitting and the Tunnel having to be Massaged or cut to get the ... It is a US Gear Dual Range Auxiliary Overdrive unit that bolts in between a Chevy TH400 transmission and your transfercase (6 bolt round). This works, in terms of adding OD to a transmission, like a Gear Vendors unit except this is intended to allow you to be in four wheel drive as it bolts between the transmission and the t-case.Planning a wedding can be an exciting and joyous time, but it can also be stressful and overwhelming. From finding the perfect venue to selecting the most delicious cake, there are...Gearvendors offers auxiliary transmissions with ratio splitting and overdrive features for racing cars, trucks, RVs, and hot rods. Learn how Gearvendors can improve your performance, economy, and emissions …Instead, hard-core enthusiasts often opt for track-proven three-speeds such as the TH350 and TH400. Some simply adjust to the ignominy of life without overdrive, while others bolt on a Gear Vendors assembly to the tailshift. Either option works just fine, but the 4L85E combines the best of both worlds. Essentially a TH400 with overdrive and ...TH400 Gear Vendor set up. Initially purchased in 2004 - switching to overdrive tranny. going to ship to Gear Vendor approved source (or gear vendor main) so they can provide report of condition. will send pics as well. Willing to let buyer confirm condition is satisfactory before finalizing deal. If you wanted a Gear Vendor, this is a …When the gear vendors is in OD the governor & /drive ishaft is operated at lower RPM ,thus a later shift. Confusion between the VRV,,modulator & governor is out of control!!! Sell the GV & get a 700(with Diesel valve body , Diesel governor,proper TV cable & mountings built with the 4L65e planetaries & a high quality ,state of the art torque ...The Gear Vendors under/overdrive is an extremely heavy-duty auxiliary transmission that's easy to install, gives you a 0.78:1 underdrive or overdrive, can …anyone have any experience with a gear vendors setup? i like the thought of keeping my th400 but have overdrive. at $3100 it wont be happening till later this year if at all. nothing needs modifying except rear drive line length. is there a way to justify this over 4l80 swap? it'd be nice to hear from the knowledge base here on the matter, maybe i can …Gearvendors was a dealer and bought out Laycock when they went belly up. Gearvendors did some minor internal changes including increasing hydraulic pressure to te o/d ring from 500 psi to 900psi. They are generally a . 68 to .70 reduction overdrive. They work best with rear ratio in the high 3s to mid 4s. ….

The GEAR VENDORS in combination with the Powerglide is an affordable, reliable, and very efficient package. This is a superior alternative for most cars thinking of going to a Th400. The GEAR VENDORS.78 to 1 ratio allows you to go to a numerically higher rear gear to improve your 60ft. times and get it all back with the overdrive. The ...2.48:1. This is the stock ratio for the TH400. It balances acceleration and top speed well. It suits most street applications, so motor enthusiasts favor it. 2.75:1-This ratio provides more acceleration than stock but reduces the top speed; this is often used in high-performance street strip racing [email protected]. GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186TH400 with a 3.55 First gear multiplier - 3.55 X 2.48 = 8.80 Final gear of course = 3.55 #4 TH700R4 with a 3.55 First gear multiplier - 3.55 X 3.06 = 10.86 Final ratio - 3.55 X .70 = 2.49 Now think about this: Combo #4 has a multiplier in first gear equivalent to a TH400 with 4.38 rear gears (10.86 / 2.48) Combo #4 is like a TH400 with a 2.49 ...161 posts · Joined 2007. #1 · Apr 29, 2010. Hey guys, here is the scoop so I got a th400 with an electric speedo (autometer) and I got a steal on ebay for a gear vendors setup with every minus the. Red and green indicator lights and a couple cut ends of wires, (1400 bucks) its off a 94 camaro wit a th400 w/ an electric speedo, so it didn't [email protected]. GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186 Muscle Cars / Hot Rods GEAR VENDORS can give your GM / Dodge / Ford vehicle up to twice the forward gear ratios, unparalleled performance and the ultimate in horsepower handling of any auxiliary transmission. There is no competing underdrive or overdrive transmission available on the market that will give you the performance of a … Continue reading Muscle Car/Hot Rod → The Gear Vendors unit is essentially a separate automatic gearbox that, with a simple bolt-on dedicated. adapter, gives the stock tranny two personalities, effectively doubling its gear ratios throughout the entire range. So instead of having a beefy three-speed Turbo 400 you actually get an equally tough six-speed!Then I started looking at the GV unit on a TH400 that is used in Trucks/Motor Homes weighting more than twice that of a Chevelle (25,000lbs) Gear Vendors under/overdrive transmissions the most awarded auxiliary transmissions. plus Gear-Splitting resulting in 6 Gears on a TH400, hi/lo on it's Auto 3 speed Gear vendors th400, Sep 18, 2013 ... Comments11 · 5 Worst American Pickup Trucks That Should Have Never Existed · 1970 Chevy El Camino, Blue Print 350/420HP, TH400, Gear Vendors OD, ..., 448 posts · Joined 2012. #1 · Nov 9, 2014. Hey Guys. If I'm in the wrong place, please let me know.. I am considering swapping my BBC 460 for an LS3 for a little better drivability. My current setup is a 460 BBC, TH400 trans with a JW bell housing, Gear Vendors, Strange Engineering 12 bolt with an Eaton posi, 4.10 gears, C Clip eliminators …, This is a look at the interior and the PCS electronic shifter console, paddle shifters and gear vendors buttons. I take a drive and describe how these compon..., GM 4-Speed Automatics 700R4/4L60E/4L80E There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton and car applications, and the heavy duty 4L80E in the heavier applications. 700R4/4L60E’s have a low 3.06 first gear which is good for initial take off but this makes the transmission have the widest ratio … Continue reading GM 4-Speed Auto →, Feb 11, 2022 ... I made a difficult decision. We got a Gear Vendors overdrive unit for the service truck! With all the labor I got into this thing I wanted ..., Lower your rpm at higher speeds in higher gears; Protect your engine from unnecessary wear (and your wallet!) Save 20-28% in fuel economy; This means an overdrive over time pays for itself. Installation only requires basic wiring, a bolt-on to your specific transmission, and a shortened driveshaft. GearVendors Overdrive bolted to a …, Jan 18, 2021 · The two shops I’ve discussed with recommended a 4L80E swap. Other enthusiasts (thank you Lew) are recommending Gear Vendors OD. Both seem to be great options, just curious what others experience have been and what would be the difference in cost. I believe my existing TH400 is pretty well built so no concern with it in general other than ... , 448 posts · Joined 2012. #1 · Nov 9, 2014. Hey Guys. If I'm in the wrong place, please let me know.. I am considering swapping my BBC 460 for an LS3 for a little better drivability. My current setup is a 460 BBC, TH400 trans with a JW bell housing, Gear Vendors, Strange Engineering 12 bolt with an Eaton posi, 4.10 gears, C Clip eliminators …, It is the gear under your seat that counts. Gearing is what you are buying when you purchase a Gear Vendors Under/Overdrive. If you take a few moments to study the gear chart for your transmission and rear end ratio combination you will see why this product is so popular. ... GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 ..., Mar 27, 2011 · Combo #4 has a multiplier in first gear equivalent to a TH400 with 4.38 rear gears (10.86 / 2.48) Combo #4 is like a TH400 with a 2.49 rear gear. If mpg is really important to you, go with combo #2. You still will have better off the line performance than a TH400 with 3.55 gears. , th400 route is tons stronger, with a little less od. and should cost a little more, its the way i would go. The 4L80E is just as strong as the TH400. The GV and TH400 Is a great combo, giving you a 6 speed automatic. Hard to argue with, but... The 4L80E is just as durable and has a lower first gear for take off and the serious gas saving ..., Are you tired of looking at your patchy and dull lawn? Do you dream of having a lush, green carpet-like grass that enhances the beauty of your home? Look no further. Sod is the ans..., GEAR VENDORS provides an overdrive product to race cars and trucks up to 2,000 hp. This product is particularly well suited to the special demands of Drag We..., If you are an avid golf player, you know that having the right gear can make all the difference in your game. One of the best places to find high-quality golf equipment and accesso..., C3 Tech/Performance - Gear Vendors Underdrive/Overdrive - Like many of us on this forum, I am interested in reducing my highway driving rpm's by replacing my TH400 for an overdrive automatic transmission or by replacing my TH400 for a TKO or other 5 speed manual. ... I installed a Th400 with a gear vendors unit in my 1970 with a …, GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186 ← Application Guide ← Installation, Automatic 3-Speed TH-400 2.5″ tail housing Uses 4×4 output shaft with 1.325 stickout for shortest length Transmission mount bracket included w/kit, as it is forward of standard location. ... GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020. Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186 ..., Sep 12, 2009 · Using a die grinder cutoff wheel, cut out a 6 inch wide section 1.5 inches deep and tall. Weld a 1.5x1.5x6" piece of "L" channel in the hole alont the edge and then grind off the excess. Also grind off the tooling tab (V shaped with dimple) on the underside of the adapter to clear the crossmember." , C3 Tech/Performance - Gear Vendors Underdrive/Overdrive - Like many of us on this forum, I am interested in reducing my highway driving rpm's by replacing my TH400 for an overdrive automatic transmission or by replacing my TH400 for a TKO or other 5 speed manual. ... I installed a Th400 with a gear vendors unit in my 1970 with a …, A supplier and a vendor are both entities that supply goods or services, but the term vendor can be used for both business-to-consumer (B2C) and business-to-business (B2B) sales re..., [email protected]. GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186, GEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Pre-Owned. $1,500.00. transmart4x4usainc (1,295) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $350.00., anyone have any experience with a gear vendors setup? i like the thought of keeping my th400 but have overdrive. at $3100 it wont be happening till later this year if at all. nothing needs modifying except rear drive line length. is there a way to justify this over 4l80 swap? it'd be nice to hear from the knowledge base here on the matter, maybe i can …, Coyote Direct in association with Hughes Performance brings you the best TH400 swap kit on the market. This is a complete kit that will allow you to successfully convert your automatic or manual transmission to a TH400 transmission. ... -Hughes Extreme Heavy Duty TH400, Stock case, 1+2 Billet Transbrake, 2.48/1.48 GM gear set, 2000FWHP rating ..., The cost and installation trouble of a Gear Vendor setup really is only justified with a big block, and only then if driven hard pretty often. TH350 and Gear Vendors probably shouldn't be mentioned in the same sentence. They are just a strength mismatch. On the other hand putting a GV behind a TH400 is the most common way to use a GV., 68 Malibu B&M blown 350, TH350 with 10" converter and Gear Vendors overdrive, 12 bolt-3.90 gears<BR>69 CST Pickup original 396, TH400 factory AC/PS/PB<BR>99 Harley Dyna Wide Glide<BR>91 Sportster 883- now a 1200! , Gearvendors offers overdrive products for racing cars and trucks up to 2000hp and towing heavy RV’s up to 25,000lbs gcvw. Learn how overdrive can reduce engine rpm, increase fuel mileage, and improve performance and emissions with the finest quality, OEM-approved, and proven products., In today’s fast-paced business world, having a well-organized and up-to-date vendor company list is essential for smooth operations. However, managing this data can be a daunting t..., GEAR VENDOR THM400 OVERDRIVE ADAPTER “Bare Aluminum Casting” Pre-Owned. $650.00. transactionmrmx (575) 97.8% Buy It Now. +$35.00 shipping. GEAR VENDOR …, Dec 13, 2018 ... Ingenious mechanism gives you a .78 overdrive that you can retrofit to just about any transmission on the market. Able to withstand several ..., The Gear Vendors unit is essentially a separate automatic gearbox that, with a simple bolt-on dedicated. adapter, gives the stock tranny two personalities, effectively doubling its gear ratios throughout the entire range. So instead of having a beefy three-speed Turbo 400 you actually get an equally tough six-speed!, Thinking About A Gear Vendors Overdrive... This would be for my '69 SS with a 496/TH400 with a 3.73 rear. This would be for next year, but I would need to start saving now. Right now at 60mph, I'm turning around 3100 rpm. With the 496 being quite the gas pig, and gas prices being what they are, this modification has been on my mind more …, The GEAR VENDORS in combination with the Powerglide is an affordable, reliable, and very efficient package. This is a superior alternative for most cars thinking of going to a Th400. The GEAR VENDORS .78 to 1 ratio allows you to go to a numerically higher rear gear to improve your 60ft. times and get it all back with the overdrive.