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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#28288 07/08/2002 3:07 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I'm running 20W-50 detergent in my 235. You can use the detergent oil if you change it regularly.
For gear lube, use either straight 90 or a multi-vis in the 90 range. It won't hurt to change the gear lube in the tranny and rear end.
Also, clean the breather on the differential housing. It's on the driver's side on top and is threaded. If the breather is plugged, expanding vapor can blow out an oil seal.
Fred
52 3600
69 C-10
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