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 Gear Vendors Save Gas or Diesel Fuel Extend Chevrolet or GMC Mileage, Extend Engine Life!

Does your Chevrolet or GMC 4 WD need more power to climb hills or tow with heavy loads, at the touch of a button taller gearing for cruising down the highway with the lower engine RPM's and improved fuel mileage, see application guide.  Our Gear Vendor overdrive for Chevrolet GMC are available for 4 wheel drive automatic and manual transmissions using the following transfer case (look for tag on rear of transfer case to determine what model you have, then select model from following list to get correct part number:  NP205, NP208, NP241, NP243, NP261, NP263, BW1370 and the BW4401.  Our Chevrolet GMC overdrive transmission provides 500 to 600 less RPM's plus 20% increase in fuel economy. You'll need an auxiliary overdrive transmission capable of gear splitting behind your transfer case. The toughest built best performing auxiliary overdrive transmission you can buy is the Gear Vendor overdrive from Drivetrain Specialist.

See How It Works, Guaranteed Amazing Performance for Your Chevrolet or GMC 4WD!

How it works, gears are multipliers of torque and our Ratio Splitting capability allows you to shift to a gear with more mechanical advantage than the next stock gear in automatic transmissions and wide ratio manuals. This also means engine rpm drops about half what it did without the Gear Vendors and so rpm is sustained - higher torque and rpm on shift = more Horsepower.   When shifted into overdrive final gear reducing both rpm and torque to reduce the manufacture of HP when steady cruising to improve fuel mileage and decreases wear on your engine.  Two-year warranty rated at 30,000 pounds applications for Chevrolet and GMC, most beneficial when used in commuters, tow vehicles, 5th wheels and Motor homes. Our overdrive kits are very complete and are designed for your specific vehicle, detailed installation instructions are included in kit, and installation is also available.

Related to fuel economy, performance, and emissions — Gear Vendors overdrive units include state of the art electronics circuits that keep your vehicle in the optimum performing gear. Whether you are driving a older non-computer controlled vehicle or a late model with all the latest emissions computers our electronics provide the interface to ensure maximum performance and correct rpm without lugging or over reving in the wrong gear. The OE factory programming remains intact and our processor just makes it aware of the actual ratio 1,000 of times per second. In older vacuum or throttle linkage transmissions the stock governor on the output shaft instantly slows down the moment the overdrive shifts and so automatically moves the shift point in any overdrive gear up by the correct 28.6%. So both electronic and non-electronic automatic transmissions gain a group of features including a passing gear or climbing gear that is automatically available without driver intervention and is at the split between 2nd and 3rd where you really want it. Need more information on how to save gas or diesel fuel?  Also free technical support during installation if you purchase your kit from www.drivetrain.com.

Gear Vendor's Complete Kits Ensure a Smooth Installation for You

Gear Vendor overdrive Kits are Complete with Adapters our Gear Vendors overdrives are supplies with specific adaptation kits for each model of transmission model, the kits are completed. By supplying specific extension housings to each model/brand transfer case GEAR VENDORS is able to have a better product with gvyoutubesema2008.jpg increased engineering benefit to the final installation. Our Gear Vendors ovderdrives are supplies with specific adaptation kits for each model of transfer case, the kits are completed.  By supplying specific extension housings to each model/brand transfer case GEAR VENDORS is able to have a better product with increased engineering benefit to the final installation. Fact is, when you are in 4X4 there is very little desire to use GearSplitting and overdrive unless you are racing (and we do make the in-between kit for that purpose), it's 2wd where the benefits of overdrive and additional gears are most needed. All our kits bolt directly to the rear of the transfer case and are electronically locked out during 4X4 operation, see YOUTUBE video for more information.  All our kits bolt directly to the rear of the transfer case, you can manually control the unit or we suggest you flip switch when leaving city limits sign and turn it off when you get to next city limit sign. No additional crossmembers are required and you retain the factory ground clearance instead of moving the transfer case rearward which puts it at or nearer the middle of the wheelbase where ground clearance is most critical. Read customer testimonial. free_shipping.jpg

Free Technical Support, Get Expert advice about your vehicle's performance with our Gear Vendorss Overdrive. Call toll free at 800-216-1632. More fuel milage 20%, 600 RPM reduction in Engine RPM means longer life and you save Money!

You get all the benefits of the GearSplitting performance and overdrive economy (see your appropriate transmission under GM/Dodge/Ford 2wd) and the best auxiliary transmission you can buy. Give our overdrive expert a call toll free 800-216-1632 he can answer your questions and help you pick correct model for you application, and get free telephone support during installation when you purchase from www.drivetrain.com.    Free shipping within the continental United States only.

  • You need quality.
  • You'll want reliability.
  • You want performance 22% Overdrive.
  • You want better mileage 20% more fuel economy!

YOU WANT A GEAR VENDOR

YOU GET ALL THESE BENEFITS & MORE

boltonperformance.jpg

    Gear Vendors Overdrive for your GM Allision

    Click image to enlarge

  • Save Fuel
  • Extend Engine Life
  • Save Money
  • 30,000 lbs Capability
Chevy 4x4 Application Chart & Pricing  

Chevrolet and GMC 4-WHEEL DRIVE APPLICATION GUIDE “The Absolute best in 4x4 Engineering

You get all the benefits of the Gear Splitting performance and overdrive economy listed in the 2wd section and the best auxiliary transmission you can buy.  Using the following table locate the transfer case model in your vehicle, to determine model of transfer case look for round tag on the rear of the transfer case near where the drive shaft exits, or on the Borg Warner Units look for data tag under case bolt.  Then refer to the next two columbs for detailed information specific to you vehicle.  Select your vehicle from the following table to see detailed information on improving your vehicles performance and start saving money today!

Chevrolet/GMC Application Guide 4 Wheel Drive
 
Part Number
 Application Description
 Comments  Your Cost
3D1370C Manual 4-Speed M-465 - BW 1370 Ext Cab 1370S/465 w/fixed yoke. Replaces 2 1/2" tailhousing. 89-93 4x4 1 ton dually standard & extended cab pickups. Check tail length & yoke to confirm. $2,945.00
3D1371C Manual 4-Speed M-465 - BW 1370 Std Cab 1370L/465 w/fixed yoke. Replaces 6 3/4" tailhousing. 89-93 4x4 standard cab pickup. Check tail length and yoke to confirm. $2,945.00
3D0205I NP 205 Transfer Case with Fixed Yoke, 4L80E Transmission. Replaces 1 1/8" output case housing. See NP205 Kit If a slip yoke 205, requires output shaft replacement with GM #458499 (not included). $2,945.00
3D0205A NP 205 Transfer Case with Fixed Yoke, Automatic Transmission. Replaces 1 1/8" output case housing. If a slip yoke 205, requires output shaft replacement with GM #458499 (not included). $2,945.00
3D0205C NP 205 Transfer Case with Fixed Yoke, Manual Transmission. Replaces 1 1/8" output case housing. If a slip yoke 205, requires output shaft replacement with GM #458499 (not included). $2,945.00
3D0205G NP 205 Transfer Case with Fixed Yoke, Manual Transmissions, Electric Speedometer. Replaces 1 1/8" output case housing. If a slip yoke 205, requires output shaft replacement with GM #458499 (not included). $2,945.00
3D0205E NP 205 Transfer Case with Fixed Yoke, TH400 Transmission, Electric Speedometer. Replaces 1 1/8" output case housing. If a slip yoke 205, requires output shaft replacement with GM #458499 (not included). $2,945.00
3D0208F NP 208 Transfer Case with Slip Yoke, 700R4 Transmission. Replaces 9 1/4" tailhousing with slip yoke.  See NP208 Kit Vans & pickups with aluminum case and slip yoke. $2,945.00
3D0208A NP 208 Transfer Case with Slip Yoke, Automatic Transmission. Replaces 9 1/4" tailhousing with slip yoke. Vans & pickups with aluminum case and slip yoke. $2,945.00
3D0208C NP 208 Transfer Case with Slip Yoke. Replaces 9 1/4" tailhousing with slip yoke. Vans & pickups with aluminum case and slip yoke. $2,945.00
3D0242C NP 241 Transfer Case for Suburbans, Manual Transmission. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4".  See NP241 Kit 89 Suburban with cable speedometer. With Passenger side Front Driveshaft. $2,945.00
3D0242A NP 241 Transfer Case for Suburbans. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 89 Suburban with cable speedometer. $2,945.00
3D0243A NP 241 Transfer Case for Suburbans. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 91 - 93 Suburban, electric speedometer, passenger side front driveshaft. $2,945.00
3D0243C NP 241 Transfer Case for Suburbans. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 91 - 93 Suburban, electric speedometer, passenger side front driveshaft. $2,945.00
3D0243E NP 241 Transfer Case for Suburbans. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 91 - 93 Suburban with 4L80E, passenger side front driveshaft. $2,945.00
3D0241G NP 241 Transfer Case, 4L80 Transmission. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 88-newer 4x4 GM and standard and extended cab pickups with electronic speedometer. $2,945.00
3D0241E NP 241 Transfer Case, 700R4 Transmission. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 88-newer 4x4 GM and standard and extended cab pickups with electronic speedometer. $2,945.00
3D0241C NP 241 Transfer Case, Manual Transmission. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 88-newer 4x4 GM and standard and extended cab pickups with electronic speedometer. $2,945.00
3D0245A NP 241 Transfer Case, NP 243 Electric Shift. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". Requires GM buffer (incl). 94-95 Chevy and GMC w/4L60E, 4L80E trans w/electronic speedo. Provide rear gear ratio & tire size when ordering. $2,945.00
3D0245E NP 241 Transfer Case, NP 243 Electric Shift. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". Requires GM buffer (incl). 96-98 Chevy and GMC w/4L60E, 4L80E trans-Gas Engine, w/electronic speedo. Provide rear gear ratio & tire size when ordering. $2,945.00
3D0245G NP 241 Transfer Case, NP 243 Electric Shift. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". Requires GM buffer (incl). 96-02 Chevy and GMC w/4L60E, 4L80E trans-Diesel Engine, w/electronic speedo. Provide rear gear ratio & tire size when ordering. $2,945.00
3D0245I NP 241 Transfer Case, NP 243 Electric Shift. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". Requires GM buffer (incl). 99-02 Chevy and GMC w/4L60E, 4L80E trans, Gas Engine, w/electronic speedo. Provide rear gear ratio & tire size when ordering. $2,945.00
3D0241A NP 241 Transfer Case, TH400 Transmission. Replaces both 4 3/4" & 3 1/2" tailhousings totalling 9 1/4". 88-newer 4x4 GM and standard and extended cab pickups with electronic speedometer. $2,945.00
3D1370A Automatic 3-4-Speed BW 1370S/400 Elec Speedo Ext Cab 2-1/2" Tailhousing w/fixed yoke. Replaces 2 1/2" tailhousing.  See BW1370 Kit . 89-93 4x4 1 ton dually standard & extended cab trucks. Check tail length and yoke to confirm. $2,945.00
3D0261I Manual 5-Speed NV 261 . Replaces rear transfer case housing. 2001 and up small block gas. $3,345.00
3D0261C Manual 5-6-Speed NV 261 . Replaces rear transfer case housing. 2001 and up big block gas or Duramax diesel. $3,345.00
3D4401A Automatic 4-Speed BW 4401 4L80E Trans w/fixed yoke. Replaces 2 1/2" tailhousing, requires GM speed buffer (incl). 94-01 4x4 1 ton dually extended & crewcab trucks, check tail length and yoke to confirm & provide axle ratio and tire size. $2,945.00
3D0261G Automatic 5-6-Speed NV 261/263 "Allison". Replaces rear transfer case housing. 04 and up Duramax diesel. $3,345.00
3D0261A Automatic 5-6-Speed NV 261/263 Big Block Gas "Allison". Replaces rear transfer case housing. 2001 and up big block gas. $3,345.00
3D0261E Automatic 5-6-Speed NV 261/263 Small Block Gas 4L80E . Replaces rear transfer case housing. 01 and up small block gas. $3,345.00
3D1371A Automatic 3-4-Speed BW 1370L/400 Elec Speedo Std Cab 6-3/4 Tailhousing w/fixed yoke. Replaces 6 3/4" tailhousing. 89-93 4x4 1 ton standard cab pickup. Check tail length and yoke to confirm. $2,945.00
3D1371E Automatic 3-4-Speed BW1370L/4L80 Std Cab 6 3/4" Tailhousing w/fixed yoke. Replaces 6 3/4" tailhousing. 89-93 4x4 1 ton standard cab pickups, check tail length and yoke to confirm. $2,945.00
3D1371F Automatic 3-4-Speed BW1370L/4L80 Std Cab 6 3/4" Tailhousing w/fixed yoke. Replaces 6 3/4" tailhousing. 89-93 4x4 1 ton standard cab pickups, check tail length and yoke to confirm. $2,945.00
3D1370E Automatic 3-4-Speed BW1370S/4L80E Ext Cab 2 1/2" Tailhousing w/fixed yoke. Replaces 2 1/2" tailhousing. 94-01 4x4 1 ton dually extended & standard cab trucks. Check tail length and yoke & provide axle ratio and tire size. $2,945.00
3D4401I Automatic 4-Speed BW 4401 2 1/2" Tailhousing 4L80E w/fixed yoke, Gas Engine. Replaces 2 1/2" tailhousing, requires GM speed buffer (incl). 99-02 4x4 1 ton dually extended and crew cab trucks, check tail length and yoke to confirm & provide axle ratio and tire size. $2,945.00
3D4401G Automatic 4-Speed BW 4401 2 1/2" Tailhousing Diesel - 4L80E w/fixed yoke. Replaces 2 1/2" tailhousing, requires GM speed buffer (incl). 94-01 4x4 1 ton dually extended and crew cab trucks, check tail length and yoke to confirm, provide axle ratio and tire size. $2,945.00
3D4401E Automatic 4-Speed BW 4401 2 1/2" Tailhousing Gas - 4L80E w/fixed yoke. Replaces 2 1/2" tailhousing, requires GM speed buffer (incl). 94-01 4x4 1 ton dually extended and crew cab trucks, check tail length and yoke to confirm & provide axle ratio and tire size. $2,945.00
We have included a frequently ask questions section that may answer some of your questions, don't see answers you need, just give us a call we will be happy to review your application with you. The following links provide specific application information, performance data that you can expect and the price data for your specific vehicle.
1984 Ford Ranger

On 9/14/09 I ordered the GV as a final touch for my project 1984 Ford Ranger. It was promptly shipped on 9/22/09. UPS delivered it to me in Massachusetts on 9/29/09. First I was impressed with the neat, very nice job, your packing and shipping crew did. As I laid out all the parts on a table in my garage, and read through the install manual, it became clear to me that this was a high quality product, from a top notch company. The next morning I drained my tranny, removed my driveshaft and tailshaft housing. Just 4 hours passed before I had the adapter, GV unit, electrical components, and wiring harnesses installed. (the wiring harness connections were so well marked and color coded that "even a caveman could do it!!" ) The piggyback adapter for plugging my aftermarket electric speedometer sensor to the GV sensor was a real nice surprise, it made it so easy, and I later found that re-programming the speedo was not even needed. So off to my local driveshaft guy,(Mitchell Differential+Driveshaft, in Shrewsbury, Ma.) The next morning after picking up my new shorter driveshaft,(decided to keep original in case of any future changes) I installed it to find 5/8" free play on slip yoke, Wow!! I must have measured right! Promptly I filled the GV with recommended synthetic gear oil... $$$!!! and filled my tranny fluid. Now, I did one last inspection of all my work, and prepared for the big road test!

Gear Vendor Overdrive Installation in 1984 Ranger Engine
 Gear Vendor Installation 1984 Ranger gv_ranger_inst_3.jpg

As per the instructions, I drove a few miles with the overdrive off. Now my finger was shaking with anticipation just as it was about to depress the gv button........(will all my time, and all that money be worth it?)......... click. YES!! It worked perfectly, just as described on your website. My 302 w/roush heads and all the other goodies seemed to come alive like never before, it seems to be in the peak powerband right up through all of my new-found 6 gears! The Performance Automatic Super Streeter C4 seems to be made for the GV. What a huge difference on the interstates at 70 mph the rpm is now down from just over 3000 to 2400, and it is quiet and relaxed. In just a little over 2 weeks of driving I've already noticed I'm not having to unsnap my tonneau cover and fill the fuel cell as often. This GV is on the top of my very long list of modifications and improvements.

My wife often likes to remind me of all the money I've poured into my Ranger project, since I retired from my career as a truck driver, just over a year ago. She is right, no expense has been spared on the re-make of this fun little truck. The Gear Vendors is worth every penney and will eventually payback in fuel savings and less wear and tear.

So thanks to all who helped out in sales, and Mike in tech, for your assistance, and thank you all at Gear Vendors for such a fine product. Feel free to use my letter or pictures if you care to.

Richard

Brimfield, MA

 

 

 
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