by SChandler » Thu May 22, 2008 4:46 pm
Better is debatable. The Getrag has larger gears, but smaller bearings and can have issues with the synchros. The NV4500 has smaller gears, better bearings, more aftermarket support (an upsized input shaft for use with dual disc clutches), is more common, and likes to lose 5th gear (many fixes available in the aftermarket). The only problems I've had with the Getrag in my 90 was due to a crappy rebuild and in the 92 was due to a tired case bearing coming apart (after 230k miles of service). Unless you are a hard core sled puller or drag racer and need to go to the 1 3/8" input shaft for reliability/clutch selection, I would stay with the Getrag. My .02, plenty of people will agree and disagree with me. Overfill the Getrag by a quart and avoid lugging it (especially when towing/loaded heavy) and it should live a long life.