GM Service Manual Online
For 1990-2009 cars only

Identify transmissions by the number of forward gears and the measured distance (in millimeters) between centerlines of the mainshaft and the countershaft.


Object Number: 1327  Size: SH

The New Venture Gear NV3500 (85 mm) five--speed overdrive manual transmission is identified by the RPO M50 for four wheel drive vehicles and RPO MG5 for rear wheel drive (RWD) vehicles.

The transmission has the following features:

    • Constant mesh helical gearing for reduced noise
    • A two-piece aluminum housing.
    • Synchronized shifting in all forward gears
    • A shift tower mounted shift lever.

Identify the transmissions by the number of forward gears and the measured distance (in millimeters) between centerlines of the mainshaft and the countershaft.


Object Number: 102867  Size: SH

The New Venture Gear NV4500 (109 mm) five--speed manual transmission is available as RPO MW3.

The transmission has the following features:

    • Synchronized shifting in all forward gears
    • Constant mesh helical gearing for reduced noise
    • Overspeed inhibitor from low to first speed gears
    • Dual cone low speed gear and 1ST speed gear synchronizer
    • A shift tower mounted shift lever

Object Number: 102867  Size: SH

NV4500 Manual Transmission

The New Venture Gear NV4500 (109 mm) is a five speed manual transmission used on light duty trucks. This manual transmission is identified by the RPO MW3. The 109 mm is the distance between the input shaft and the counter shaft. The transmission is available in rear wheel and four wheel drive versions.

The transmission has the following features:

    • Made from cast iron for durability.
    • Synchronized shifting in all forward gears.
    • Constant mesh helical gearing for reduced noise.
    • Overspeed inhibitor from low to second speed gears.
    • Dual cone low speed gear and 2nd speed gear synchronizer.
    • Multiple ring synchronizers for smooth shifting.