4r70w transmission problems

I have zero experience with new edge mustangs so take this with a grain of salt, but Google/Copilot came up with this?



Did only 6qts come out when you drained it? Does that transmission need a friction modifier?

You may read my other post about my experience, similar to what I think the poster above is referring to about the friction modifier - I made the mistake of having my auto trans FLUSHED at 180,000 miles or so, and it started slipping badly on the hwy, I had to pull over wait a few, and restart the engine, then was able to drive home ok. I hopped on forums and discovered my mistake, you don't FLUSH a trans at high mileage (and some say never) you just do the old drain and fill as in the old days, I was told to drain enough fluid to add a bottle of Lucas trans fix, the proper one for my year and make of car - it worked! Currently I have 249,000 miles on my car, and it almost always shifts perfect, only a good "bump" when on a road trip, heavily loaded, accelerating and decelerating in hilly mountainous driving - I do know the trans is worn, I expect to rebuild it in a year or two - and I am not hot rodding around, I may drive fast when caught up in traffic, but I only put the petal to the medal when I have to -

If the dipstick is dry add till it reads on it. Then report symptoms.

How much fluid did you remove from the system when draining?

Dipstick was not dry at all, level was full - I drained JUST enough fluid so adding the bottle of Lucas trans fix would not overfill the transmission - 16 oz, maybe?

apple99Mustangdude said:

Dipstick was not dry at all, level was full - I drained JUST enough fluid so adding the bottle of Lucas trans fix would not overfill the transmission - 16 oz, maybe?

Click to expand...

I was asking the OP.