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Printed From: Official Baja SAE Forums
Category: General
Forum Name: Design Discussion
Forum Description: Discuss Design, Tech, Cost, and related issues
Printed Date: Dec/06/2021 at 12:56am

Topic: Oil
Posted By: KaylaSAE
Subject: Oil
Date Posted: May/23/2014 at 11:32pm
Hey guys! What kind of oil you guys run in your transaxle and why?
We're running 75W-90 and finding that its foaming up a ton.

Posted By: QQ King14
Date Posted: May/23/2014 at 11:39pm
Can you be more descriptive?

Posted By: KaylaSAE
Date Posted: May/23/2014 at 11:45pm
Basically I'm looking for what kind of transmission oil to run in the transaxle since we've been having the problem of the oil foaming up during the endurance event. I'm curious to see what other teams are running, what their problems are, and what is good about the oil they're currently using and why they're using it. :D

Posted By: QQ King14
Date Posted: May/23/2014 at 11:48pm
Well currently I run a duck feather / epoxy mixture.  The high viscosity allows for the fluid film lubrication layer to be thick enough to prevent surface contact between our gears.  It also allows for us to run our trans in high revs at all times due to the cooling capabilities of the duck feathers. :)

Posted By: Richie_Dagger
Date Posted: May/24/2014 at 1:36am
I think we run 0W Royal Purple engine oil. The thinnest stuff you can find the better. No point in wasting HP churning 75W. Don't overfill your gearbox either. Too much oil will lead to overheating and foaming. We run just enough oil to touch tangent to any one gear, and that gear will through enough oil around to lube up the whole box. In last years gearbox that probably amounted to a couple tablespoons worth, yet the oil didn't get too hot and it was still enough for it to piss out the input shaft at the top of the trans.LOL

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