transmission and rear gear oil

[okdingy2]

looking to upgrade manuel trans and rear gear oil. Running oem 80-90w oil. Oil is in a 7.5 rearend and 4 speed mustang trans. Any thoughts.

[Profile]

REDLINE is the best I have ever used. Makes the FOD tranie shift like hot butter.

[84Dave]

Brad Penn or RedLine. Or Gibbs oil if you have a lot of $$$. -Dave-

[little302]

Is that the BP classic GL4? Does nobody run synthetics?

[mark41]

i use mercon atf in both rear end and transmission.. less drag all around

[BVS40FL]

Mark 41 forgot to tell you.... ( and you non diesel people may NOT believe me) but after he drains the rear end and tranny, he puts/re-uses that fluid in the fuel tank of the tow vehicle and burns it on the way to the track !!!

[mark41]

why yes i do Buddy!

[pitroad mafia]

ATF with a splash of lucas oil treatment and cam break in additive ( zinc additive....7 bucks at advance) oem is too thick causes drag