Rearend Fluid

Reply Subscribe

Thread Tools

Search this Thread

Nov 22, 2003 | 01:01 PM

LoWeLL216

Thread Starter

TECH Apprentice

iTrader: (1)

Joined: Oct 2003

Posts: 328

Likes: 0

From: San Diego, CA

Rearend Fluid

Hi guys,
I'm sure there will be a million answers to this, but what is the best fluid to use in a 10 bolt rearend with GM 4.10's. I'm new to this and don't really know what the differences are. Thanks!

Nov 22, 2003 | 02:50 PM

Slow ET

Teching In

iTrader: (1)

Joined: Jan 2002

Posts: 37

Likes: 1

From: Ft. Lauderdale

Redline 75w90 is good

Nov 24, 2003 | 10:45 AM

X-RACER

Teching In

Joined: Nov 2003

Posts: 26

Likes: 0

I allways used Mobile 1 and had good results. Also, do not forget the GM limited slip additive.

Nov 25, 2003 | 09:50 AM

SteveC

TECH Resident

Joined: Jan 2002

Posts: 877

Likes: 55

From: Poway, Ca. where GOD and the sun always shines

I use 85W-140 dino oil, with the GM additive.

SteveC

Nov 25, 2003 | 08:34 PM

Slowhawk

LS1Tech Sponsor

iTrader: (12)

Joined: Nov 2001

Posts: 14,865

Likes: 6

From: Bridgewater,Ma

I use 85w-140 dino oil in all the 10 bolt's I work on.GM additive for Auburns(you can use it with torsons).

The thicker oil can help quiet down 4.10 gear whine too.

Nov 25, 2003 | 09:01 PM

Orange Krush

TECH Addict

Joined: Dec 2001

Posts: 2,850

Likes: 0

From: Plainville,MA

Quote:

Originally Posted by LoWeLL216

what is the best fluid to use in a 10 bolt rearend with GM 4.10's?

In my original 3:23 geared 10 bolt I swapped out the factory fluid and replaced it with

Lucas oil. http://www.lucasoil.com/Products_List.cfm

I used 1 pint of their 85/140 and 1 pint of their stabilizer, that rear end went onto 500+ 1320 passes and over 150+ dyno pulls!

It never failed!

As a matter of fact that rearend was pulled apart recently by my gear installer and he was in shock @ how new looking all the internals were, including the Zexel Torsen posi unit!

The rearend I replaced it with was a highly abused