4x4 problems

RA · Post by RA » Sat Jan 28, 2006 5:40 am

hey guys i took my truck in for some warranty repair on the 4 wheel drive. i noticed when i put it in 4hi and try to turn it is making some grinding noise and acts like it is locking up. the gm service department told me the front axle needs to be serviced. they said it would cost around 100$. has anyone else ran into this problem? i thought about doing it myself but i am not for sure if i should, it might be better to let them incase it does not solve the problem. what do yall think?

F9K9 · Post by **F9K9** » Sat Jan 28, 2006 6:36 am

If it is warranty work, why do you have to pay for it?

Post by **HenryJ** » Sat Jan 28, 2006 7:01 am

You might see what a quick lube shop charges to change the front differential lubricant. If it is more then you could do it yourself. Be sure to keep the receipts for proof that you did change it and used the correct lubricant.

SONOMA915 · Post by **SONOMA915** » Sat Jan 28, 2006 7:35 am

f9k9 wrote:If it is warranty work, why do you have to pay for it?

They will not warranty anything that has a scheduled service interval, espicially if you havent servicd it. Thats the way we work here. I have seen alot of engine oil sludged cars that have skipped two or three oil changes and they always ask for reciepts. Normal repair is in the $1200 range. I think its worth it to have it done, dosent cost as much as replacing the whole axle. Just save your reciept in case it still does it, then they should take care of it under warranty. Just my .02!!

RA · Post by RA » Sat Jan 28, 2006 8:55 am

how often are you suppost to change the diff. fluid, i looked in my book is says to check it every oil change but i did not see were it talked about changing it. the gm service manager told me that the fluid gm uses is no good. he said they would replace it with a different type that is alot better.

F9K9 · Post by **F9K9** » Sat Jan 28, 2006 9:48 am

SONOMA915 wrote:
f9k9 wrote:If it is warranty work, why do you have to pay for it?
They will not warranty anything that has a scheduled service interval, espicially if you havent servicd it. Thats the way we work here. I have seen alot of engine oil sludged cars that have skipped two or three oil changes and they always ask for reciepts. Normal repair is in the $1200 range. I think its worth it to have it done, dosent cost as much as replacing the whole axle. Just save your reciept in case it still does it, then they should take care of it under warranty. Just my .02!!

I misread his question............my BAD

Retep · Post by **Retep** » Sat Jan 28, 2006 6:40 pm

RA wrote:...when i put it in 4hi and try to turn it is making some grinding noise and acts like it is locking up.

Are you by chance driving in 4hi on dry pavement? That would be a big no no.

RA · Post by RA » Sat Jan 28, 2006 9:58 pm

no, i was out at the ranch when i noticed it. the 4 wheel drive was working fine a month ago. i use it at least once a month needed or not.

BADs Crew · Post by **BADs Crew** » Sun Jan 29, 2006 4:17 am

f9k9 wrote:
SONOMA915 wrote:
f9k9 wrote:If it is warranty work, why do you have to pay for it?
They will not warranty anything that has a scheduled service interval, espicially if you havent servicd it. Thats the way we work here. I have seen alot of engine oil sludged cars that have skipped two or three oil changes and they always ask for reciepts. Normal repair is in the $1200 range. I think its worth it to have it done, dosent cost as much as replacing the whole axle. Just save your reciept in case it still does it, then they should take care of it under warranty. Just my .02!!
I misread his question............my BAD

No I'm BAD , but i read it the same way you did.

BADs Crew · Post by **BADs Crew** » Sun Jan 29, 2006 4:30 am

How many miles are on your truck and what is the recommended service point on the front diff?

Post by **HenryJ** » Sun Jan 29, 2006 8:08 am

That is going to be a tough one. From what I can tell the owners manual does not set a specific interval.

It should be checked at each oil change and replaced if there are signs of contamination.
GM data says:

** Drive axle service.

Bravada: Drain and refill at first oil change. At subsequent oil changes, check fluid level and add fluid as needed. If diving in dusty areas or towing a trailer, drain fluid and refill every 25 000 km (15,000 mi).

Check fluid level and add fluid as needed. If driving in dusty areas or when towing a trailer, drain fluid and refill every 25 000 km (15,000 mi).

Locking Differential--Drain fluid and refill at first engine oil change. At subsequent oil changes, check fluid level and add fluid as needed. If driving in dusty areas or towing a trailer, drain fluid and refill every 25 000 km (15,000 mi).

More frequent lubrication may be required for heavy-duty or off-road use.

Chilton's manual says that both axles on a 4x4 should be treated the same and recommends changing the fluids at the first oil change and at 15,000 miles for dusty, dirty conditions or for a vehicle used for towing.

Heat and contamination are the enemies. Checking the condition of the fluid is the best answer. If in doubt change it.
Some will never change the fluid for the life of the vehicle. If rarely used I could see a 50 or 100k service interval. If you wheel in water it may need to be changed every other week.

The best thing to do is check the condition at each oil change.

BADs Crew · Post by **BADs Crew** » Sun Jan 29, 2006 8:53 am

I have been wanting a new rear diff cover and I plan on changing the gear oil front and rear when I install it. I know this is off subject, but is the gear oil the same front and rear or does the front one run something different ?

Post by **HenryJ** » Sun Jan 29, 2006 8:56 am

GM Data wrote:Front and Rear Axle Standard Differential Axle Lubricant (GM P/N 1052271) or SAE 80W-90 GL-5 Gear Lubricant

Rear Axle (Locking, Differential) Axle Lubricant, use only GM Part No. 12345977 (in Canada use Part No. 10953482). Do Not add friction modifier

The owners manual lists: Front and Rear Axle (Standard Differential) SAE 80W-90 Axle Lubricant (GM Part No. 1052271 or equivalent) and Rear Axle (Locking, Differential) Axle Lubricant; use only GM Part No. 1052271 Do Not add friction modifier

BADs Crew · Post by **BADs Crew** » Sun Jan 29, 2006 9:08 am

HenryJ wrote:Front and Rear Axle Standard Differential Axle Lubricant (GM P/N 1052271) or SAE 80W-90 GL-5 Gear Lubricant

Rear Axle (Locking, Differential) Axle Lubricant, use only GM Part No. 12345977 (in Canada use Part No. 10953482). Do Not add friction modifier

Do not add friction modifier in either case or its just with the Canada lubes?

Post by **HenryJ** » Sun Jan 29, 2006 9:18 am

BADs Crew wrote:Do not add friction modifier in either case or its just with the Canada lubes?

Do not add friction modifier

RA · Post by RA » Sun Jan 29, 2006 11:18 pm

i have 35,000 miles on the truck but my 3 years was last week. it seems strange that the 4hi was working fine 5 weeks ago. i never even thought about the diff. needing to be serviced and im still not convinced thats the problem. i will let yall know what happens i am taking back in the morning to talk to the service manager.

RA · Post by RA » Tue Jan 31, 2006 4:39 pm

hey guys, i got the front diff. serviced at a quick lube place they charged me 25$ vs 100$ at gm. it did seem to fix the problem. i also got some new shoes for my truck 31" bfg t/a ko's i really like them. the truck looks a ton better. i did not have to do the tb crank they fit fine no rubbing. anyways thanks for the help you guys are super.

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