basketballord

It is sealed so you shouldn't have to add fluid. But you should flush and replace the tranny fluid every 30K i believe. kind of expensive, but cheaper than a new tranny

mustangman02232

its more like basic maintnence, not really a mod

fullmonte60

i change it every year with the anti freeze and fuel filter. i used redline for the 1st year. i drained the factory crap the 2d day i had the car. this time i used RP for oil, trans & rear. for the trans you only need to buy 3 qts (2.75 is used). so for $20-$30 it's a no brainer.

mustangman02232

also IIRC TREMEC back spec'd fords recomendations of full synthetic to just regular dino stuff, seeing as temecs the one that makes the trannys and not ford, id probably listen to them

UltraKla$$ic

Mustangman, I'm a Mustang noob, what are you saying here that TREMEC recommends just plain ole dino oil for the tranny over synthetic?


Also, I couldn't wait for my supplier to ship the Redline D4 ATF(recommended for my 5-speed) so I just used the Royal Purple Synchromax. I'm glad I had that article I linked to in order to perform the job, it went smooth as silk, but I'da been in a bind if I had not read that link and used the 3 foot of 3/8" tubing to reach from inside the car, through the floorboard, and all the way to the fill hole. Wow, gotta love the internet.

I guess the Royal Purple is good stuff......eh?

mustangman02232

if i remember correctly, tremec (the supplyer of manual trannys) recomends merc III in their trannys rather then merc V (syn) (im lookin for the article)

Charlie321

I also used RP Synchromax soon after I bought my '07 because the tranny noise was really irritating. The noise is still there, but slightly mellower, and the shifts are smoother.

Also, a good tip: the square hole in the drain plug is exactly the same size as the male end on a 3/8' socket wrench. Just insert a socket handle directly into the drain plug.