Anyway to tell if a tranny has been rebuilt by looking at it? How about the way it drives and acts, any characteristics of a built tranny versus a stock tranny? Just curious if I have a stock tranny or not and have no way of knowing. Thanks.

 

Some builders glue a heat disc to the tranny case. If you overheat the tranny the center melts out and then they spike your warrenty. If it's been painted it's a good bet it's a rebuilt. Sometimes builders put tags on them to show what's in em. Other than that you would have to drop the pan and compare the vb and other components to stock. That's the only way I can think of to tell.

 

Well the truck has 137k and I have put it through the paces. Have not had any trouble with it, KNOCK ON WOOD! I was just wanting to grind my fuel plate and didnt want to do that to a stock tranny. I was wondering since my truck has as many miles on it as it does if it had been rebuilt or not. It has a gooseneck hitch so I know it was used to pull something, so would you think at that mileage that it had given out at some point? I dont know what mileage they usually go out at after being used to pull. Thanks.

 

It's all driving habits and maintainance. My pops can nurse a truck more miles than anyone I know but I am a little tougher on them.

 

Can tell a lot by driving it. My Goerend tranny shifts firm, and the torque convertor has a lower stall speed. Pulls a lot more on the engine, putting it into gear, than a stocker ever will.

If it was rebiult, as a "stock" tranny, you may never be able to tell by driving it. The valvebody may have a tag attached to it somewhere, telling you what it is.

 

Well the truck definately has firm shifts, but I have not driven a known stock tranny behind a Cummins so I dont know how to compare. Guess it will just have to be trial and error. Thanks for the input.