GM NV4500

Does anyone in the group have any experience with the GM NV 4500 five speed manual transmission? I recently purchased a rebuilt one and installed it in
my '84 Chev Blazer. Ran great for about 4 months. Than the problems began. Started to make this thrashing sound, like some bearing was sorta giving way. Then about a month ago, the 3rd gear synchro began giving me problems. Today I parked it in the garage at home so as not to drive it. Fortunately, it is still under warranty and the outfit I bought it from is going to honor their warranty. But it means another R/R. The old four speed I took out was practicly bullet proof. Have I screwed up by replacing the 4 speed? Am I going to continually have problems with the 5 speed. It sure is great to have the 0.70 final gear ratio when on the hi-way. This is my daily driver. Any wisdom to be shared would be greatly appreaciated!
Thanks to the group, Willis
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On Thu, 22 Jul 2004 15:35:43 -0600, "Willis Layton"

the NV4500 is an EXTREMELY stout transmission... sounds like your trans wasn't aligned properly with the engine and toasted the input bearing. did you use a belhousing for the NV4500 or did you reuse the 4 speed's bellhousing?
-Bret
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