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Differential oil |
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Woody1968
AMC Fan Joined: Dec/10/2021 Location: Crete Illinois Status: Offline Points: 21 |
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Posted: Jan/22/2022 at 8:50pm |
Sooo I've had this 1968 AMX since 1979.
I've haven't changed the Differential Fluid. What oil do I use, standard 90 weight? Thank you, Woody1968
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6746 |
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42 years and no differential fluid change?
Take the cover off and clean out the differential. Wash it down with a can or 2 of WD40, light spray oil, non chlorinated brake cleaner ... of some sort, clean and inspect everything for wear/rust... Service specification is 90 GL4, if limited slip - additive required. Personal preference is 80W90 or 85W90. Also have found synthetics are slightly noisier then conventional in older differentials. A TSM with proper service specifications and maintenance schedule would be a good investment. |
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Woody1968
AMC Fan Joined: Dec/10/2021 Location: Crete Illinois Status: Offline Points: 21 |
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Thank you!
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4064 |
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If it's a twin grip, add a friction modifier even if the lube says it's approved for limited slip. I've had good luck with the Ford friction modifier, a 4oz bottle is about $8 online. Bob tufcj
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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mbwicz
Supporter of TheAMCForum Joined: Feb/20/2019 Location: Buffalo, NY Status: Offline Points: 1979 |
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My 1970 TSM says to use limited slip additive whenever servicing an axle, even on an open differential. So even if you aren't sure if your car has a twin grip, plan on adding the limited slip additive.
Mike
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1970 AMX, one step forward, one step back. Both steps cost time and money.
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Woody1968
AMC Fan Joined: Dec/10/2021 Location: Crete Illinois Status: Offline Points: 21 |
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Thank you!
Correction, it was changed 15 years ago when I did the back brakes. The car has always been kept inside and doesn't get a lot of miles! Going to change that this summer! I really love this Forum! Thank you All!
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