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Kirkham Motorsports

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  • 1 Post By Gaz64

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Old 11-28-2019, 10:54 AM
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Default Gear oil????

Noticed a puddle of smelly greenish blue fluid on garage floor. Took this pic to see where it was coming from. You'll see drops on the driveshaft and green paste splattered.

Tranission has been giving me fits from second to third shifts so was thinking it might be from that, greenish color told me problably gear oil, but no leaks from differential housing. Not too familiar with rear end assembly's.

Cars got a macked out 351W with blower and 9lbs of boost. My guess is probably the seal where the driveshaft inserts into differential right?

If so what now? New pinion seal.

Thanks(Thanksgiving, ha!) a bunch for any input.
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Last edited by RedHawk; 11-28-2019 at 11:55 AM..
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Old 11-28-2019, 04:02 PM
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Yes that is diff fluid leaking. You also have sling line (blood trail) from L-R on the photo.

There are quite a few Green Gear oils out there, Redline Shock proof, GM, Brad Penn, are just a few.

If memory serves the GM oil used to be blue and would change to a green when dirty.
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Old 11-28-2019, 04:23 PM
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351, 9psi, and pinion oil seal leak.

My bet is the pinion bearings are wearing, insufficient bearing preload, pinion moves under load, pinion oil seal weeps.

You should also check your diff breather system is clear.

Don't ever do a pinion seal unless you know what you are doing.

Gary
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Old 11-29-2019, 02:42 PM
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Thanks!
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