Which gear oil weight should I be using?

bhicks

NAXJA Forum User

Location

Forest Falls, CA

• Jun 17, 2010

• #1

I'm not really sure if this belongs in "modified" or "OEM". I just did some rear axle work on my dana 44 with a detroit locker. When I went to refill the gear oil I realized I bought 80 90 weight and not the usual 85 140 weight. After a moment of thought I realized I'm not even sure which weight I should be using. Any thoughts?

 

rweaver138

NAXJA Forum User

Location

Brooklyn, CT

• Jun 17, 2010

• #2

75 w90 or for "towing or severe use" 75/80 w140

 

srmitchell

NAXJA Forum User

Location

Mckinleyville (Humboldt) CA

• Jun 17, 2010

• #3

Correct me if Im wrong, but isn't the w140 the viscosity only in cold weather?

I wouldn't worry about it.

I use 75/90 mobil I think.

 

T

troys 96 xj

NAXJA Forum User

Location

Ohio

• Jun 17, 2010

• #4

I use 75-90W

 

M

MaxxXJ

NAXJA Forum User

Location

Bakersfield CA

• Jun 17, 2010

• #5

i use rotella 80/90 weight.

 

kastein

NAXJA Member

NAXJA Member

Location

Rainy side of Washington

• Jun 17, 2010

• #6

I use whatever is cheap and on the shelf at autozone when I show up. Usually the Coastal with the green-themed label... absolutely no idea which viscosity it is :looney:

 

A

austinaubinoe

NAXJA Forum User

Location

Montgomery County, MD

• Jun 17, 2010

• #7

5 gallon drum of Coastal from autozone. So cheap you will never hesitate to change your diff fluid!

 

jeeperjohn

NAXJA Forum User

Location

Temecula, CA

• Jun 17, 2010

• #8

You don't want 140 weight, it is not necessary for the detroit and it will increase your fuel consumption slightly.

 

bhicks

NAXJA Forum User

Location

Forest Falls, CA

• Jun 18, 2010

• #9

Thanks for the replies guys. It would seem that I will stick with the 80 90. I was really just looking for a piece of mind and you guys just gave that to me.