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Shop Now for GM New Venture NV4500 standard transmission Countershafts and Countershaft Gears from our comprehensive, in-stock inventory of quality replacement parts for your 4x4 or 4x2 NV4500 5 speed. Applications include:
1992-1999 C/K 2500/3500 with NV4500
2000-2007 Chevy Silverado, GMC Sierra with NV4500
Early production NV4500 transmissions used a modular Countershaft (see QU10090) that featured replaceable, press-fit front gears for gear ratio changes. All 1992-1994 transmissions used the modular design. We have also seen these countershafts used on a number of 1995 transmissions. A few may have been used as late as 1996 model year trucks with low production drive-train combinations. The Countershaft 5th gear is located behind the countershaft rear bearing and its is supported by QU10141 Caged Needle Bearing.
The original countershaft used in the NV4500, had replaceable front gears (see QU10090 and our Countershaft Gearing). The shaft was changed to a one-piece design in 1995 after GM discontinued the 6.34:1 reverse and switched to the same 5.61:1 reverse ratio that Dodge used. In 1997, New Venture redesigned the NV4500 Countershaft for a 5.04:1 reverse gear ratio. The 1997 and newer countershaft is NOT interchangeable with 1992-1996 Countershafts.
