Differential fluid change intervals?
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Drifting
Joined: May 2006
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From: Minnesota
Differential fluid change intervals?
I have a 2000 with 35k and am thinking about doing a full flush this fall. Coolant, tranny, oil and differential. Regarding the differential is this even needed past the "nice to have" thing? The service manual makes it look so easy that for $25 I might as well do it. I subscribe to the ounce of prevention club.
Another question is fluid type. I have heard some good things about Amsoil from another thread but I am unsure if I still need to add the limited slip additive with it. I also am considering the Royal Purple stuff... For reference if anyone needs the info SM states you need 1.6 qts of lube to do a flush. Or was that 1.7
Another question is fluid type. I have heard some good things about Amsoil from another thread but I am unsure if I still need to add the limited slip additive with it. I also am considering the Royal Purple stuff... For reference if anyone needs the info SM states you need 1.6 qts of lube to do a flush. Or was that 1.7
Race Director
Joined: Jul 2004
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From: Lake Havasu City, AZ
Since you profess being a member of the club.....An ounce of prevention never hurts, nor does 4 oz of GM limited slip additive.(regardless of which brand 75W90 synthetic gear oil you buy)
I stuck with Mobil1 on my rear diff oil change.
I stuck with Mobil1 on my rear diff oil change.
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Guess it can't hurt to change all the fluids. That way you know that they are fresh.
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From: King George VA
Originally Posted by j84buick
Another question is fluid type. I have heard some good things about Amsoil from another thread but I am unsure if I still need to add the limited slip additive with it. I also am considering the Royal Purple stuff... For reference if anyone needs the info SM states you need 1.6 qts of lube to do a flush. Or was that 1.7
The AMSOIL Severe Gear Extreme Pressure Synthetic 75w90 comes with the friction modifier already in it and adding extra modifier is not normally needed. I've been using this fluid for several seasons and my diff has never chattered so I've never added extra modifier.
I believe the downside to adding to much modifier is that the diff clutch plates will slip excessively, meaning you have lost some of the diff's limited slip ability.
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AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
