|
Overdrive Units, GM 4 Speed Auto
YOU WANT A GEAR VENDOR YOU GET ALL THESE BENEFITS & MORE |
|
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| GM 4 Speed Automatic Truck/Motorhome | GM 4 Speed Automatic Final Drive Ratio | |
| GM 4 Speed Automatic Performance Car/Street Rod | GM 4 Speed Automatic Application Chart & Pricing |
There are two basic GM 4-Speed automatics: The light duty 700R4/4L60E found mainly in half ton or lower 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 changes of all popular makes. The intention or the designers was best possible EPA ratings, not performance. The Gear Vendors will give you Gear Splitting to those wide ratios with a rear between each or them for the tremendous gains in performance. See the Final Drive Ratios and Horsepower and Torque curve in this section. Gains of over 40 horsepower and 60lb ft. or torque are easily achieved without any modifications to the engine.
The our overdrive also gives you an important “towing” overdrive gear that is between the tall factory ratio and Drive (3rd). This gear will give you 11% more torque multiplication and lower transmission temperatures by as much as 100 degrees when compared to factory overdrive. Some of these vehicles with low rear gears can also make use of double overdrive when running empty.
4L80E’s used in motorhomes and trucks have a .75 overdrive ratio very similar to Gear Vendors .78 but the factory unit tends to unlock and lock (hunt). The Gear Vendors will not hunt and will also reduce temperatures in the main transmission by as much as 100 degrees on warm days. Consequently all our customers tow in the GV ratio and greatly extend the life of the transmission.
Trucks running empty can make use of double overtime for great economy and extended engine life. Motorhomes present too large a frontal area to the oncoming wind to make double overtime practical but because they are always loaded they greatly need the Gear Splitting and alternative Overdrive features of the Gear Vendors.
Gear Splitting is the feature that allows the OVERDRIVE to shift between the gears. You will now have approximately 1/2 the drop of engine rpm from one gear to the next when you want power. This is why this overdrive will give you more power than any underdrive or overdrive on the market. By keeping torque multiplication higher and engine rpm narrower you increase engine performance by typically more then 40hp and 60lb ft. of torque without any modifications to the engine (see Final Drive Ratio charts and Horsepower and Torque curves in this section) (see also common questions on performance modifications).
This is why big trucks ( Kenworths etc.) use gears (most 18 wheelers have 15 to 21 gears) instead of modifications. Because gearing gives them performance which actually improves the reliability of the engine. The heavier you are loaded the more you need an overdrive.
If you already have engine modifications ( chips, exhaust, fuel increases, etc.) our overdrive will let you get the most from them through working in narrower rpm ranges when loaded and also by adding torque multiplication to make it easier on the engine and trans.
The Gear Vendors comes with a 2-year unlimited mileage warranty (on non commercial applications) and a 30 day money back guarantee that you will love the performance (see warranty for details). The Gear Vendors is the only after market performance device or auxiliary transmission that comes as original factory equipment on new cars, trucks, vans or motorhomes. Over 1 million in the 80’s and 90’s were installed by manufacturers on vehicles; i.e.; Ford Diesel Transit Vans (European market), Volvo gas and diesel, Fleetwood, Allegro, Rexhall, Monoco and others motorhomes and GM’s Twin Turbo Callaway Corvette.
If you’re vehicle is heavily loaded or you just love performance
our Gear Vendors Overdrive is the ultimate option. Call our customer service line
@ (800) 316-1632 and we will arrange for purchase and installationr or by your preferred
mechanic.
GM 4 Speed Automatic Performance Car/Street
Rod
The 700R4/4l60E was designed for improving GM’S CAFÉ (Corporate Average
Fuel Economy) ratings. Because of this it has a very low 3.06 1st gear and a very
tall .70 overdrive ratio. This makes it the widest ratio automatic transmission on
the planet (rear wheel drive) with only 4 gears. The Gear Vendors fixes the wide
ratio problems so that when you want performance you have a gear between each of
the factory ratios. This gives you approximately half the drop in the engine rpm
and torque multiplication (see final drive ratios).
You can easily have increases in horsepower in the 50+ range and torque boosts of 70lb ft. just by gear splitting. With 8 forward gears available the motor stays in a narrow rpm band of performance. The .78 ratio of the GEAR VENDORS gives an alternative overdrive ratio to the very tall factory gear and the Gear Vendors can be used with virtually unlimited horsepower (if 1200hp or less it gets the standard product). If you have a car or hotrod truck, also read the 3-speed 2wd section. If you have a truck used for towing, read also the GM 4-speed automatic truck section.
Check out the unlimited horsepower warranty and money back guarantee and the simple installation in the dimensions section. Then order give us a call..
In addition to the overdrive units, we also provide an impressive
list of automotive after market products for car, pickup truck, SUV and 4wd repair
parts and accessories that includes rear
end covers, ring and pinion
gears, OE clutches and heavy duty performance
clutches, diesel gauge kits, exhaust brakes,
re manufactured manual
and automatic transmissions
and both manual
and automatic
overhaul kits. Other products we offer for the RV recreational vehicle market include
REMCO drivelinedisconnects,
tow bar and baseplates and
positraction units to improve vehicle performance and save fuel. We have a complete
4 wheeling drivetrain product
line including complete differential assemblies, limited
slip and other solid
locking positractions. We offer transmission conversion
kits including the NV4500
and NV5600 as well as replacement
kits for light duty GM and Jeep transmissions. You may be interested in visiting
our Ford and Powerstroke Diesel
page, Dodge Ram and
Jeep pages for detailed
information.
Watch for future additions of new products to be added to our on-line catalog including advanced wheels, tires, engine tune-up kits and other accessories.
Need more information call 1-800-216-1632 talk
to a knowledgeable technician.
To order or make and appointment call: 1-800-216-1632
From time to time we offer specials discounts
to our registered Internet customers, click below to register and receive advance
notice of new products, special bonus offers and to be eligible for our free random
gift drawings, we protect your e-mail address we, don't sell, trade or abuse it.
Click Here to Sign UP 
| Home |
Drivetrain Specialists of Las Vegas
Las Vegas NV, 89102
