Rear Differential Gear Oil to tune handling balance - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

dpaqu · 05-03-2020, 10:55 AM

Has anyone tried using different gear oil to tune the stock torsen differential? I am wondering if it's having a subtle affect on the corner exit push I sometimes feel. Maybe I should just stop apexing late.

Yoshoobaroo · 05-03-2020, 12:53 PM

The diff is gear driven, the fluid viscosity or friction modifiers will have negligible effects on the lockup behaviour, that only really works on viscous diffs and clutch diffs.

strat61caster · 05-03-2020, 01:45 PM

Can you get more camber?

Edit: yes, the rear diff and factory suspension outgrips the front, imho more front grip is the solution, not less rear lockup.

GrabTheWheel · 05-03-2020, 03:40 PM

If you want to "tune" your diff you'll need to swap the torsen out for a clutch type LSD.

dpaqu · 05-03-2020, 11:10 PM

Ok. I read a lighter weight oil would increase the locking affect somewhat. Guess not enough to matter.

I do need more front camber. Stock ride height on factory crash bolts doesn't seem to be enough.

Yoshoobaroo · 05-04-2020, 12:18 AM

Quote:

Originally Posted by dpaqu

Ok. I read a lighter weight oil would increase the locking affect somewhat. Guess not enough to matter.

I do need more front camber. Stock ride height on factory crash bolts doesn't seem to be enough.

I heard good things about the pedders top hats

05-03-2020, 10:55 AM	#1
dpaqu Member Join Date: Aug 2018 Drives: 2018 Gt86 Location: MD Posts: 41 Thanks: 9 Thanked 4 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Rear Differential Gear Oil to tune handling balance Has anyone tried using different gear oil to tune the stock torsen differential? I am wondering if it's having a subtle affect on the corner exit push I sometimes feel. Maybe I should just stop apexing late.

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05-03-2020, 03:40 PM	#4
GrabTheWheel Senior Member Join Date: Feb 2018 Drives: 16' BRZ Location: California Posts: 362 Thanks: 76 Thanked 162 Times in 91 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	If you want to "tune" your diff you'll need to swap the torsen out for a clutch type LSD.

05-03-2020, 11:10 PM	#5
dpaqu Member Join Date: Aug 2018 Drives: 2018 Gt86 Location: MD Posts: 41 Thanks: 9 Thanked 4 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Ok. I read a lighter weight oil would increase the locking affect somewhat. Guess not enough to matter. I do need more front camber. Stock ride height on factory crash bolts doesn't seem to be enough.

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