SM 465 gear oil help - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Richard** · 08-01-2024, 02:52 AM

Quote:

Originally Posted by Sheepdip

I run Lucas Full Synthetic 75W-90 in both my rear end and manual gear box.

The custom D60 front axle I purchased for my truck from East Coast Gears had a tag on it that said "do not use full synthetic gear oil" Take it or leave it.

**Sheepdip** · 08-01-2024, 10:10 AM

Quote:

Originally Posted by Richard

The custom D60 front axle I purchased for my truck from East Coast Gears had a tag on it that said "do not use full synthetic gear oil" Take it or leave it.

I'm sure they had their reasons.

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