putting gears in, do i need a limited slip additive

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05-20-2013, 08:40 PM

david2450

Thread Starter

Join Date: Oct 2009

Location: Kentucky

Posts: 9

putting gears in, do i need a limited slip additive

I'm putting 4.10 gears in an got some valveoline 80-90w that the Haynes manual called for, do I need to put a additive in also?

05-20-2013, 08:58 PM

Darkhorse04GT

Join Date: Oct 2012

Location: Riverview, FL

Posts: 11

Quote:

Originally Posted by david2450

I'm putting 4.10 gears in an got some valveoline 80-90w that the Haynes manual called for, do I need to put a additive in also?

If you have a limited slip, yes you need the additive. Otherwise the clutches will engage during normal turns causing the rear axle to attempt to drive straight ahead.

05-21-2013, 12:04 AM

FrostByte

5th Gear Member

Join Date: Jun 2006

Location: NY

Posts: 2,307

Some oils come width additive in it already. Read the label to be sure.

05-21-2013, 07:38 AM

cliffyk

TECH SAVANT

Join Date: Dec 2006

Location: Saint Augustine, FL

Posts: 10,938

Most synthetic gear oils are sufficiently "slippery" that f/m additive is not needed--as Frostbite said, "read the label". Too much friction modifier, or f/m added to synthetic oil, will make the LSD clutches slip too much and not lock up as they should...