hey guys, i am not new to diesel engines, i have my AZ license and have been floating equipment for 2 years now. I work for my old man who owns and services 9 trucks, all with cummins/eaton powerplants, so i am somewhat knowledgeable towards diesel engines. I recently purchased an 03 4 door cummins, and i am absolutely in love with it . My biggest worry with this truck is the auto transmission, i have heard plenty of horror stories. The point of all of this, i am unsure about what steps to take in preventing failure with it. It is fairly fresh right now, it was rebuilt less than 80,000 km ago, and i am thinking about doing some work to it to keep it that way.

I haven't got intentions of making huge power with this truck, max would be a CAI, Smarty JR, boost fooler, and 4" strait pipe. The truck will tow about 20 times a year, between hay wagons, land scape / dump trailers, and my 78 Chev on 38.5's, never anything more than 9000 lbs.

I have looked into ATS and NADP tranny's, but i know a guy who does unbelievable work with transmissions. Is there advantage to just buying parts? can i build a reliable transmission with a deep pan, valve body, torque and some different clutch packs cheeper than buying a complete one? im just not sure, auto trannys in diesels are completely new to me, any input is greatly appreciated! Cheers!

 

yes, if you do the tranny rebuild right,and use good aftermarket parts right the tranny will be just as good as a tranny bought from one of the big name companies.