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View Full Version : Cold weather owners read this......


hoot
02-10-2003, 21:46
IMPORTANT: This information is intended for vehicles sold in very cold weather climates, especially those in Alaska and certain regions of Canada.

An upcoming bulletin addresses the use of synthetic front axle lubricant for 4wd C/K trucks with 9.25-inch front axle assemblies sold in cold weather climates.

http://service.gm.com/gmtechlink/images/issues/cnt_mo/TLFeb03e.html#story13
AbqGeorge
02-10-2003, 22:07
Hmmmm, "grape juice" all around, eh? ;)
Why not.
schnier
02-11-2003, 06:51
Well it seems that when I changed mine two years ago, I did put synthetic in the front and back. Guess that means I am covered.
IndigoDually
02-11-2003, 09:20
I changed mine to Amsoil last fall. I guess I'm ahead of the curve too. :D
I was surprised how little oil the front diff holds. I wasn't expecting less than 3 qts. (IIRC)

John
mowser
02-11-2003, 11:02
I noticed that it also said to change the vent hose connector, if the hose connector is black to a white hose connector (part# 12479296)..... Since the black one is not compatible with synthetic lubricants.
ccds
02-11-2003, 20:32
hoot:

thanks for the good info

smile.gif
hoot
02-11-2003, 21:11
You're welcome.

Good info is what we are all here for!
c5dura
02-12-2003, 09:29
Quote:

---
I noticed that it also said to change the vent hose connector, if the hose connector is black to a white hose connector (part# 12479296)..... Since the black one is not compatible with synthetic lubricants.
---

Hmm, I siliconed my black one onto the diff housing after removing the o-ring. It was leaking really bad before since it would 'jump a thread' when screwing it on moderately tight.

Is the 'white' one a better design that won't leak? I wish someone would make a metal cover instead of this cheap plastic crap...
BobW
04-14-2003, 17:40
Does anyone know the TSB Number that accompanies this front axle lube change. I'm going to hit my dealer up for it but having the TSB would help.
Thanks!
DieselBunny
04-15-2003, 01:42
The notice came out in the March edition of Techline .... I too went after my dealer .... The Dealer would'nt do it on a local level ...said he'd have to call the regonal service manager to get the go ahead.

Just a footnote to add though .... they change all the new trucks over to synthetic before delivery.

I just went a did it myself and yep, the new vent connector is still plastic. ... I just used a bit of locktite plastic thred sealant ... works great and you can still take out the vent of you had to.


--->Kevin