rear gear fluid?

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04-16-2007, 12:29 AM

wildazme

3rd Gear Member

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rear gear fluid?

whats the correct grade of rear end fluid to use for a 98 mustang gt? im going to be getting royal purple and just want to know what grade i should get. thanks.

04-16-2007, 12:32 AM

sitnlopro99gt

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RE: rear gear fluid?

75w-90 redline is what I run in my 8.8, some people go bigger but that will be fine.

04-16-2007, 01:33 AM

wes ley n the G T

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Join Date: Jul 2006

Location: New Orleans, LA (westbank)

Posts: 706

RE: rear gear fluid?

Quote:

ORIGINAL: sitnlopro99gt

75w-90 redline is what I run in my 8.8, some people go bigger but that will be fine.

+1 I just had 4.30's installed and I used Royal Purple 75W-90 as reccommended by the guy who installed my gears.(he has a 9 second chevy nova lol)

04-16-2007, 12:50 PM

Brute03

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Join Date: Jan 2006

Posts: 2,504

RE: rear gear fluid?

i remember reading somewhere that ford changed it to 75w-140 in '99

04-16-2007, 02:09 PM

Slprstang04

Join Date: Apr 2007

Posts: 7

RE: rear gear fluid?

don't forget the friction modifier

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