Quote:
Originally posted by gmcblu
Maybe you left the following details out because they weren't a factor in any of these cases, but I'd be curious to know if the lube levels were up, and if everyone, including the previous owners, used the correct synthetic lube. Was the Cummins chipped? There's so many different reasons why a tranny can go out and I'd have to know more before I would say that the NV4500 is a bad tranny. 
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On the '94 K2500, yes, by brother is anal about maintenance. Fluid levels were fine, and it was the correct synthetic. On my dad's Dodge, yes, he's not anal, but he doesn't like to pay for repairs, so he makes sure it's done. It did have the correct synthetic, and the levels were right... on both his trannys.
On my friend's '92, I know for a fact that he uses 90w (non-synthetic) with moreys, and I'd bet $100 it has been and always will be overfilled. I try to tell him different and he don't care! Maybe he's on to something, since his is only making noise and hasn't grenaded...
Oh, No chips in my brother's or my dad's.
There is a chip in my friend's 454, but his is holding together.
I had thought about 5-speeds from older medium duty trucks, but I discovered, as Duallie did, that most aren't overdrive.