sup all , i was wondering how often you guys change your trany fluid ? and what you use ? i have a 700r (in a 88 iroc 305tpi) with 115k on it and it still workes great so i want to keep it that way . are there any better fluids i should use in a high mileage trans other than regular atf ? currently i am planing on doing it once a year . btw this car is my daily driver even in the winter . thanks .

 

well if it has had regular ATF changes through out its life then i would just stay with regular recommended atf for each change.

 

Typically every 30,000 miles is a good interval. That's how often we change the fluid in our fleet vehicles, and the transmissions routinely go 200,000 miles (except the Dodges, but that's another story!).

I would just use normal ATF DExtron III. Don't use any of those trans addative or stop leak products. These cause the seals to swell and can make the trans leak, or worse yet fail. If everything is working fine now just stay on top of the fluid and filter changes and it should provide you plenty of trouble free miles for years to come.