Viscosity Chart - Motor Oil vs. Gear Lube

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Apr 12, 2009 | 10:04 AM

#11

jp13

Tourer

Joined: Apr 2007

Posts: 361

Likes: 1

From: upstate ny way upstate

I checked at advanced auto today, they do not carry any. I will check auto zone next.

Apr 18, 2009 | 08:21 PM

#12

jimmers1817

Ultimate HDF Member

Joined: Nov 2007

Posts: 6,975

Likes: 12

From: NJ

That gear lube study caught my attention. Particularly this line:

"Using gear lube
that is too thick, however, has disadvantages. Thicker oils are more difficult to circulate, particularly in cold temperatures,

and wear protection can be sacrificed".

I switched to 75-140 some time ago and it has improved my tranny performance but now I'm wondering if it being heavier than the 20-50 recommended is increasing the tranny wear.

Any thoughts?

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Apr 19, 2009 | 01:18 PM

#13

Jessie

Cruiser

Joined: Mar 2008

Posts: 231

Likes: 0

From: Clermont, Fla

lucas

I use lucas syn with stabilizer in all 3 hole's and love it !!!

Apr 19, 2009 | 04:03 PM

#14

pococj

Seasoned HDF Member

Joined: Dec 2004

Posts: 11,068

Likes: 1,473

From: Texas! Ya mean there's someplace else?

Quote:

Originally Posted by jimmers1817

That gear lube study caught my attention. Particularly this line:

"Using gear lube
that is too thick, however, has disadvantages. Thicker oils are more difficult to circulate, particularly in cold temperatures,

Not to worry; the 75w-140 roughly corresponds to between 10w-60+ through 20w-60+. Cold weather you are at or below the 20w-50 viscosity.

Apr 20, 2009 | 09:33 PM

#15

oct1949

Club Member

Joined: May 2007

Posts: 145,895

Likes: 821

From: 40 miles Northeast of Indy..

Just went with Belray 80-140 gear lube in tranny and like it a lot better than the Syn3, then Fromula+. all three were suggested by dealer.
now have syn3 in motor. formula+ primary, belray in tranny...