5Liter Import Eater

I just ordered 3:73 gears and all the install parts needed. What is the best type of rear axle fluid to use? is there a certain brand or type to use thats better than others? How much should i expect to pay to have the gears installed?

91hatchgt

Expect about 250$ - 300$ for the install.. And those are good prices.. Most shops around here cost about 350$ or more.. I found one shop, did my 4.10's for 236$ out the door..

mstng675l

There is no real special oil to use unless you are going to go synthetic.. I believe Royal Purple makes synthetic oil for rear ends.... You will also need the limited slip additive which ford makes.... You can find this at a local ford dealer or speed shop... Most of the time the shop installing the gears will already have these things...

nemethjames1

yeah, make sure to get aditive... but essentialy oil is oil.... i got burned the first time i paid a shop.. i supplied fms gears, and there labor was 450+.. i was stolen, now there out of buisness.... LOL

Tims 88GT

i have royal purple and it has friction modifer in it alredy

5Liter Import Eater

what kind of oil is the correct one, iv seen 80w 140 or 70w 90 is there a certain type i need?

mstng675l

85w will do fine... You may also use 80w or 90w.... I always use 85w though........

Green5pt0

for those prices, dont rule out doing it yourself. i did mine, but the book can probably explain better than i can. As far as oil goes, synthetic is better than non, but i dont think brand matters too much as long as you have friction modifier.

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