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Product Description


In 1992 Dodge and General Motors trucks started appearing in showrooms with one of the most versatile transmissions ever to be offered in a production truck: the New Venture Gear 4500. General Motors applications include it as an option in 3/4 and 1-ton full size trucks.  Dodge standard duty units come in trucks with the 5.2 and 5.9 liter engine, while Dodge HD versions are used with Cummins diesels and V10’s.

This transmission is a fully synchronized (except reverse on GM models) five-speed gearbox with all of the strength and low-gear benefits (and then some) of the older granny four-speeds, with a 27-percent overdrive. The cast iron case is combined with massive gear sets in an almost compact 200lb package. This unit shifts with a smooth, short action and very distinct shift gates. We consider it the premium manual trans swap for 4×4 vehicles.

Gear Ratios:

Current production Dodge NV4500 and GM NV4500 share the same gear ratios. Early GM units (93-94) were built with a lower first gear ratio of 6.34 to 1.0. These low-geared GM boxes have since been discontinued and are generally much more difficult to obtain. We are able to provide new and remanufactured NV4500s with these early gearsets.

Beginning in 95’, all GM units were built with the same gear ratios as the Dodge unit.


GM 93-94 95/up GM; 93/up Dodge
First Gear 6.34 5.61
Second Gear 3.44 3.04
Third Gear 1.71 1.67
Fourth Gear 1.00 1.00
Fifth Gear 0.73 0.73
Reverse 6.34 5.61





Dry weight: 195 lbs.
Oil capacity: 1 gallon
Rated GVW: 14,500 lbs.
Case material: cast iron
Synchronizers: Carbon fiber composite
Main/Counter shaft bearings: Timken tapered roller


NV4500 GM (6.34) GM (5.61) Dodge Dodge HD
Main case 12.375″ 12.375″ 12.375″ 12.375″
4WD Adapter Housing 8.125 8.125 6.25 6.25
2WD Tailhousing 6″ Tailhousing 6″ Tailhousing 13″ Tailhousing 13″ Tailhousing
Yoke Fixed Yoke Fixed Yoke 30 spl Slip yoke 31 spl Slip yoke
Input shaft stickout 6.625 6.625 7.625 7.625
Input shaft spline 1.125″ 10spl 1.125″ 10spl 1.125″ 10spl 1.250″ 10spl
Pilot Dia .590″ .590″ .750″ .750″

Bearing Retainer specification


Bellhousing T/O bearing
Index Dia. Snout Dia.
GM NV4500  1993-95 5.125″ 1.373″
GM NV4500  1996 and up 5.60″ none: Int Slave Cyl
Dodge NV4500 Standard Duty 5.60″ 1.43″
Dodge NV4500 Heavy Duty 5.60″ 1.75

Bellhousing Bolt Pattern:

  • GM 1993-1995  10.078 across the top, 10.394 across the bottom, 4.685 vertically
  • GM 1996 + up   10.078 across the top, 9.738 across the bottom, 6.043 vertically
  • Dodge (All)        10.078 across the top, 9.738 across the bottom, 6.043 vertically

Shifter Stub Specification

The NV4500 shifter will have a short stub sticking up from the top cover, There are 3 different methods by which a shifter extension handle attaches:

  • Dodge NV4500 1993-1999   A short, square stub sticks up
  • Dodge NV4500 1999-up        Threaded stub, 14mm x 1.5 pitch threads
  • GM NV4500 (All)                      Threaded stub, 12mm x 2.0 pitch threads

You MUST use the correct synthetic lubricant. The GM part no. for the correct oil is 12346190 (quart). The Dodge part number for the same oil is 4874459   Use of ANY other oil in the NV4500 will lead to failure and also voids any chance of a warranty claim.


  1. :

    […] Does that bearing go by another name? I am not seeing pocket bearing on this exploded diagram… NV4500 INTERNAL PARTS DIAGRAM – Enterprise Engine PerformanceEnterprise Engine Performance Now the next question, obviously a missing roller is not good but assuming I am not doing any […]

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