Real quick and easy question plz help

[1_bad_GT]

hey guy i got a 91 mustang gt and need to no what kind rear differential (sp) fluid to put in her? is it like 80w 90? im assuming i need stuff for a limeted slip diff? thanx for the help

 

[dirtysohc]

I use Royal Purple synthetic 75w90. 80w90 is fine as well.

 

[slow93]

i use 80w90 and yes make sure it is for limited slip

 

[dirtysohc]

slow93 your avatar makes my pants grow uncomfortably tight.

 

[1_bad_GT]

yea i bought the stuff today is 80W 90 and for limited slip just wanted to make sure before i put it in, thanx alot, also u guys no how much it will hold?

 

[CoupedUp]

Are you saying the gear oil you bought is approved for use in limited slips or are you saying you bought fluid with the limited slip additive already in it

 

[slow93]

yea i bought the stuff today is 80W 90 and for limited slip just wanted to make sure before i put it in, thanx alot, also u guys no how much it will hold?

off the top of my head i think it holds about 2 1/2 quarts...dont hold me to that though

 

[slow93]

slow93 your avatar makes my pants grow uncomfortably tight.

i dont think im ever gonna get tired of that av!

 

[Daggar]

I think the term "friction modifier" is what's missing.

 

[vristang]

I think the term "friction modifier" is what's missing.

 

[1_bad_GT]

Are you saying the gear oil you bought is approved for use in limited slips or are you saying you bought fluid with the limited slip additive already in it

It says sutibul for limeted slip on the bottle

 

[CoupedUp]

It says sutibul for limeted slip on the bottle

Then I would call the company that makles it and ask them to hire an editor to proofread and make corrections on the poor spelling they put on the bottles ....




You need an additive to go in with the gear oil ...
A normal size tube of friction modifier.
You put the complete contents of the tube in before any gear oil ... ask your local parts store ... they will know.

 

[1_bad_GT]

k got all that done and she's hookin posi again, also i want to change the tranny fluid seeing as how i just got the car. and if what came out of the rear end is any thing like the tranny fluid im in trouble. so do i just put 80w 90 in the tranny to??? and where is the drain plug? filler plug? i never really looked and im sure u guys will no right away. thanx again for all the help

 

[CoupedUp]

k got all that done and she's hookin posi again, also i want to change the tranny fluid seeing as how i just got the car. and if what came out of the rear end is any thing like the tranny fluid im in trouble. so do i just put 80w 90 in the tranny to??? and where is the drain plug? filler plug? i never really looked and im sure u guys will no right away. thanx again for all the help

Since the assumption can be made that the car is Mexican shift ("Manuel") ... all you need is DexronIII/Mercon automatic tranny fluid.

The drain and fill plugs are on the passenger side of the transmission case.
Since the plugs have a female square shape in them, all you use to take them out is a 1/2" drive ratchet.

The lower plug is to drain the fluid and the upper is to fill ... it works off gravity

Pick up a quart bottle or gallon bottle fluid pump ($5) at your parts store, since you will need it to pump the ATF back into the tranny.