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Unread 05-23-2013, 09:59 AM   #1
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1983 CJ7 
Join Date: Jul 2012
Location: Ocean Springs, MS, MS
Posts: 203
Which oil for Detroit Tru-Tracs?

Changing oil today since axle rebuild (500 mi). The Eaton Rep told me to use non-synthetic but the my mechanic used a 75w90 full synthetic when he filled her up last. It has no whines or noises of any kind this far so I'm kind e inclined to use the better oil. What do you guys think?

'83 CJ-7_258 I-6_T-4_D300_AMC20/D30_Bone Stock

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Unread 05-23-2013, 10:29 AM   #2
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1982 CJ7 
Join Date: Apr 2011
Location: Lewistown, PA
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I used some Lucas gear oil in mine, I believe it was 75w90. I'll put that in with my Detroit Locker as well.
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Unread 05-23-2013, 01:45 PM   #3
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My Detroit's call for the oil originally used in that particular axle or service manual. I use 85w but I think synthetic would be fine maybe better.
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