2002 Bravada Front Diff Case Busted.

[matt_o_70]

I have been experiencing similar situation (have only owned the bravada a few months) - did the fluid changes and drove but could still feel the added drag of the transfer case engaging the front driveline at all times.

I recently Pulled the "4WD" fuse on my 2000 and Instantly noticed that it drives 100% better exactly as I would expect for 2wd - I suggest you give it a try. It at least suggests that the transfer case motor is working (not stuck).

Now I need to find a service manual to better test the AWD system. I do not have any trouble lights on. So now the question is why is the transfer case being engaged. typically an AWD system is engaged when the sensors detect a difference in wheel speed or front/rear drive shaft speed.

I am hoping someone who has GM experience with these cars can chime in with some diagnostic insight.

be sure to check the basics first, tire pressure, and tire size/wear. a problem with one tire can cause a difference in front rear axle rotation due to the reduced rolling diameter of the tire with low pressure. Are all 4 of your tires the same condition?

[SandyCamel]

I have the 2003 Bravada AWD and I have been experiencing the same transfer gear case, differential, control motor, computer problem, or whatever the cause that creates the chatter, shaking, braking like symptoms whenever turning. The first incident the dealship said the transfer gear case oil needed changed. We did that. That eliminated the problem for a short while. I relocated to another area, and the problem started again. I took it to a different dealer, and they changed the oil. Yeah, it is a very special oil and they charge $175 for that service. Well, the symptoms started again. It just turned 40,000 miles-- and I have had it serviced by the book... I'll take it back to a dealership tomorrow to talk about permanent repair under warranty. I had bought an extended warranty. But, I suspect I'll encounter problems... like it is expired or the extended warranty does not cover this component. The point being, this site with everyone's comments, gives me some ammunition to take on a possible battle. I'll let you know the outcome.

[skdpsmith]

Front Differential still okay - still no leaks BUT the binding is back. I changed the transfer case fluid twice just like the procedure said and it was okay for about a month but its back again.

[Chris Stewart]

Are all 4 tires the same size and the front tires about 2psi more air than the rear?
Have you tried unplugging the ATC fuse just for a test?

[skdpsmith]

All Four tires the same. Air pressure the same. I haven't tried the pulling the fuse yet.

[DatsunRider510]

Guys...found this post...a bit old, but highly relevant to me. I have a 2002 olds Bravada (newest model, first ones off the assembly line). We were on vacation in SC (650 miles from home), and the front differential started making a horrible grinding noise. Gets especially bad when braking or slowing down. I've never seen a leak in the case, but is there a recall on anything in the front diff? Has anyone had this sort of issue? I suppose that it's possible there is a crack, and the leak has been really slow, leading to an empty case now. The car does spend a good deal of time away from the garage, and there is that big crossmember under it.

Also, as far as the transfer case issues, I switched to a race-grade Red Line auto tranmission fluid in the casing. I'll have to look at which fluid specifically, but I haven't had any binding or other issues with it in 50,000 miles. Screw that GM stuff.

[reddog2110]

I have a 2000 bravada with the transfer case chatter. I just found out by taking my local GM service guy for a ride.

Symptoms: While moving forward and backwards at very low idle (parking) while turning, a vibration or shake in the drive train is present. Does not happen at regular/fast idle at all.

Unfortunately, he said my extended warranty probably will not cover whats wrong. He said the transfer case plug is probably corroded and needs to be cleaned and or replaced.

I'm going to unplug my ATC fuse for now and try and locate the plug he is talking about. Any feedback as to where this plug may be located specifcally would be helpful.

Thanks, Cliff

[DAMNBRAVADAS]

Hello Everyone

My posted is mainly directed for old_master I have a 02 olds bravada.Back sometime last year in 2011 my service AWD light started coming on.Well needless to say I took it to my local dealer and was told my differentail was totally shot I paid nearly $2000 to have it repaired in June 2012 and since then not only does the AWD light still go on and off but now the service ENGINE light is on as well. When I drive my car it feels like it's stalling or like it doesn't want to change gears or like it's skipping or jurking when changing gears. Do you know what might be causing these issues? You seem to have alot of knowledge on the BRAVADAS please help me if you can. Also are you any where near northren california?

[Chris Stewart]

You can have the codes checked at most chain type auto parts stores free.
Post them for more clues to your problems.

[ericn1300]

Welcome to Automotive Forums. This thread is 4 years old now and seemingly unrelated to your problems, you might get better results if you start a new thread with a better description of your problems in the title.

[Protech Mobile]

Customer calls me up and says his bravada is stuck in the middle of the road out front of his house and wont move. Told him get a floor jack and move it back into the garage. Got out there and found both front axle boots clamps came apart and grease leaked out. So I started to remove the shafts to replace them. It was going well but the left side came out with a little resistance so it took a few more hits with the hammer. I hit the shaft and out popped the axle, so i crawled to that side of the vehicle and found the inside bearing was attached to the axle shaft and it had scored up the inside of the case pretty bad. Got out my flashlight and looked inside the axle shaft hole and it looked pretty dry and kind of rusty. Went around to the right side and i could see that grease had been lubricating that side but it wasnt runny like fluid should be. I put a drain pan under the front differential and removed the plug.....NO FLUID CAME OUT!! BONE DRY. LOOKED FURTHER INTO THE LEFT SIDE AXLE SHAFT HOUSING AND IT WAS ALL RUSTED ON THAT SIDE.
Anyone seen this yet? Customers says he has had the truck for a little over 4 years and never changed that fluid.
This doesnt look like a fun job to do on the ground. Is it true that the whole under cradle comes down and control arms too??
It appears the steering gear comes out but the nuts on the inside of the tunnel that the mounting bolts go through for the steering gear....all seized and a normal length socket wont fit over the long length of the bolt. This is one long bolt.
After the cradle is removed, should this be aligned also? I have not pulled one of these all wheel drive front diff. units off a vehicle yet since 2000.
My alldata doesnt say anything about alignment.

[Chris Stewart]

Sorry, I'm not familiar and have no 2002 FSM.

Anyone else familiar?