My current project

[cterrebonne]

im sure those techs knwo what they are talking about but it doesnt seem to make any sense to me. you only change half of the total fluid anyway and i dont think a filter would hurt anything. in my case my trans was making noise before and after so i dont know

[Skools Out]

there's fluid in certain areas they stay in place and hold valves in place but once you drain the pan then if the chance those vlaves move due to no fluid they might go the wrong way then keep fluid in incorrect areas of your trans which then cause's it to die fast and early, the rule is in 3,000 miles after the fluid change you will either still be running or pushing. don't you think if they wanted or thought the fluid needed changing they would have installed a drain plug? there's no drain plug in a trans on the GM stuff.

[THEFERMANATOR]

Originally Posted by Skools Out

there's no drain plug in a trans on the GM stuff.

Many of GM's trucks came with drain plugs after 97, and my ALLISON DEFINATELY has one. I for one personally believe in changing the fluid AND filter every 30K for a daily driver, and every 15-20K for a vehicle that gets worked. I've seen WAY too many GM trannies get diagnosed as bad or fail because of lack of maintence. And when I was at DODGE you could tell if one hadn't been changed by how loud they were on a cold start. After about 40K miles the tranny will howl on a cold start if the fluid hadn't been changed. The problem with fluid changes is if you haven't kept up on it by the book, then don't do em at all. Once you go more than 30K without a fluid and filter change you will get particle build-up inside the valve body. If you change the fluid and filter after this has gotten built up, the fresh additives in the new fluid will almost certainly clean that build up out and deposit it in areas you don't want it.

[cterrebonne]

[QUOTE=THEFERMANATOR;The problem with fluid changes is if you haven't kept up on it by the book, then don't do em at all. Once you go more than 30K without a fluid and filter change you will get particle build-up inside the valve body. If you change the fluid and filter after this has gotten built up, the fresh additives in the new fluid will almost certainly clean that build up out and deposit it in areas you don't want it.[/QUOTE]


thats pretty much the mantra i use for them. i was only at 30K after the rebuild when i changed the fluid.