I have a 2007 Chev. Tahoe with 54,000 miles. I have recently had a grinding in the frontend and took it to my local dealership. Dealership said water was in the front differential and needs to be replaced or rebuilt (approximately $2400). Dealership said only way this could have happened is for the vehicle to have been in two to three feet of water and are refusing to apply the warranty for the repairs. I am the only one who has driven the vehicle and it has never been in six inches of water, let alone two to three feet. Ever heard of similar issue?
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Re: Water in front differential
The dealership is trying to get out pf paying for the problem. I'm not going to say this is a common problem but it does seem to happen a lot. The axle seals leak quite frequently also the pinion seal leaks.There might be also be a problem with the vent, the hose could have came loose or hole in it. There is also an oring seal around the filler hole that may not have been installed properly.
If the dealership fails to help you call the GM customer assistance center and lodge a complaint. Chevrolet Customer Assistance Center 1-800-222-1020
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The guage could be bad and losing connection triggering the message. My dads Tahoe reads low oil pressure but the sensor connection or stepper motor that moves the guage could and have had a history of being faulty.
actually, it's most likely a differential problem. if the pinion or worm gear id missing a spur, it will vibrate and grind until enough oil covers them to stop the friction...usually after 10 min or so. what they will do is use a micro lubricant that seeps into the metal to keep it lubed up even when the oil has settled to the bottom of the case, this will at least quiet the grinding for those 10 min or so until the inevitable happens and the gear shatters because of vibration, wear, etc.
if its in the front, youll still be able to drive, but only in 2WD and you will hear a loud grinding/rattling, very unpleasent sound, from the front end. have them open up the case and look at the gears instead of assuming, its 10 bolts for gods sake so they need to do their job and WORK! dont let them toss you aside, tell them what you want...sometimes thats what it takes.
Are you under warranty? Make it the dealers problem if its eligible.
If the front hubs are grinding regardless of being in 2wheel or 4wheel drive it can be the hub bearings which turn regardless. If it grinds only when in 4x4 then the wheel shafts or differential or front driveshaft or transfer case is making the noise because all of these parts move when in 4wheel drive.
oil and air filter every 3 mo or 3000 miles which ever comes first the timing belt needs to be checked really soon and you might consider taking it to the dealer for a transmission flush filter and fill. the dealer can set you up with the best intervals to do the major maintenance.
The only thing i can think of is to do the wheel alighnment and remember you can adjust the weels,not only for them to run straight but also to stand up straight.
Stand in front of your car and look at the weel thats making the problem, does it stand like this | or like this /