1985stang

I've been reading through the search results about tranny fluid, and i still have a few questions.

1. Should i change it? Someone said it's bad for a tranny that's never been flushed, and that it will mess stuff up if it hasn't been done regularly. The problem is, i have no idea if it's ever been done because i haven't always owned the car.

2. Should i use the Royal Purple Syncromax since it's a 5-speed, or use the atf even though it's manual (which makes no sense to me).

PX429

You don't need the Synthetic, but you can use it. Just get regular ol ATF.

1985stang

So you do use the automatic tranny fluid in a manual? Ok, thanks for the help.

dimebag

yes you do use ATF, i forget whats in mine, but i no its a full synthetic. ill prob switch over to GM syncromesh tho, its suposed to be the best there is

1985stang

Thanks for the help dimebag. I'm just trying to get an idea of what i should use if i get around to changing it out.Theshifting has beena little rough, and i figure if it's like any other fluid that was in the car when i got it, it's junk.

dimebag

it cant hurt it at all to change it thats for sure.... my buddy just picked up an 89, trans felt like ****, i had him swap fluids and its better... but yea now i/we get to rebuild it, 2nd syncro is ****, 3rd is on its way....

67mustang302

You can never change fluids too often, only not often enough

1985stang

Yeah, i'm really hoping new fluid helps it. If it's the synchros, i willbe stuck with it for a while considering i don't really have the funds to rebuild the tranny. Good luck with your buddy's car.