This 3-4 synchronizer assembly fits all NV4500 tranmsissions. This is hub and slider only. We have key and spring kits available seperately.

This 5th gear clutch fits all versions of the NV4500 transmission.

This input shaft fits all GM NV4500 transmissions with a 22 tooth gear. This is pretty much all 1994 and later.

This is an aftermarket replacement shift tower for the NV4500 5 speed transmission found in GM trucks. This will work on most GM shift tops with the square 4 bolt pattern. Beware there is a late GM top (maybe 2003+) that has a taller stand where the tower bolts on. These are a finer thread [...]

This is an aftermarket thrust washer for the 5th gear on the countershaft in a NV4500 5 speed transmission.

This updated mainshaft fits all NV4500 Dodge diesel 5 speed transmissions. This is the updated shaft with splines the full length of the 5th gear and a 2 piece drop washer that goes in a groove behind the 5th gear to isolate it from the nut. This mainshaft virtually eliminates the problem of the 5th [...]

This syncro kit fits all Dodge NV4500 transmissions and includes 6 rings. 3-4-5 and reverse rings are brass rather than the factory fiber lined style. We have found these to work better and last longer than the original design. 

These are aftermarket brass synchro rings for 3rd and 4th in the NV4500 transmission. We have used these in our shop for years and feel they outlast the original fiber lined rings. These are sold individually and fit either 3rd or 4th gears.