Differential fluid change - Additive?
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Differential fluid change - Additive?
1990 f250 e4od, Sterling 10.25, Dana 50.
Changed the gear oil in both differentials, Bought the expensive stuff -GL-5 Plus for limited slip differentials. Do I still have to add the friction modifier?
Changed the gear oil in both differentials, Bought the expensive stuff -GL-5 Plus for limited slip differentials. Do I still have to add the friction modifier?
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From: Mulege south Baja ca. Mx.
Originally Posted by bustedflush
Thanks, I just wanted some reassurance before I dropped another $24 for the additive
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Originally Posted by Bruce R Leech
wow it costs 24 bucks for that little 4 oz tube . I get it here for 2 bucks.
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If you just drain all the old fluid and put new fluid in you should be fine but if you want to be very thorough...Drain all the old fluid. Put about 1/2 to 1 qt of new fluid in and roll the truck up and down the driveway once. - don't drive it, just spin the wheels a little to get the new fluid to "rinse" the inside of the housing and gears. drain again and refill. don't forget to add the really expensive additive if necessary.
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From: Nebraska
Where'd you get it? It's fairly cheap from Ford (definately under $10 a bottle) and it's guaranteed to be the right stuff. I don't know about some of that stuff in tubes at the parts stores.
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The Chilton says that my non LS only needs sae 80 or 90 without the modifier. Should I think differently? No sense spending the money if I dont need to. (Right busted??...lol)
I'm sure glad you guys have a sense of humor....
I'm sure glad you guys have a sense of humor....
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Originally Posted by TheSharkster
The Chilton says that my non LS only needs sae 80 or 90 without the modifier. Should I think differently? No sense spending the money if I dont need to. (Right busted??...lol)
I'm sure glad you guys have a sense of humor....
I'm sure glad you guys have a sense of humor....
Last edited by bustedflush; Jun 21, 2007 at 09:29 PM.
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From: Mulege south Baja ca. Mx.
Originally Posted by TheSharkster
When changing the rear differential lube, how should one go about cleaning out the housing and gears before re-lubing the differential?
1989 F150 4X2 355 non LS
1989 F150 4X2 355 non LS
If it gets a little dirty while you are working on it witch they do when I am laying in the dirt and the wind is blowing 20 MPH. I use a small pump up garden sprayer with solvent in it and give it a good flush just before you put the cover on