Car has about 156,000 miles and has never had the tranny fluid replaced. What's the best fluid to replace with and the best method?

 

Toyota ATF IV. Drain and refill and change filter. Hope it's not too late either. So had never waited for it to happen to take action.

 

Order the T-IV from Sewell and then just drain and fill it about 4-5 times.

Drain and fill process;

-: Remove bolt from transmission pan under car
-: Let drain for 5-10 minutes (About 2 quarts)
-: Replace bolt with new crush washer
-: Pour 2 quarts new fluid into the dip stick hole

Repeat this process 5-6x imo since you say it's never been replaced.

 

I've never done drain and fills for the tranny, I've been utilizing the Bilstein fluid exchanger at a tranny shop that I know of. The tranny takes roughly 15 quarts of oil.

 

That's more of a flush than a change.

 

^ Yeah that's a flush.

 

just curious if the tranny is slightly slipping at hwy speeds and it kinda lags to get into gear while driving at lower speeds how do you fix that? someone put some kind of oil that stops slips in my tranny on my truck. he said i have to drive it around 500-1000 miles. it kinda glues everything in the transmission together. i have no clue what he was talking about but do you guys know what i should do for that? i know my truck isnt a lexus but same problem as far as slipping goes. And it got a full flush btw!