Replaced cv shaft on pass side 97 blazer 4x4 . rattling forward ,rattlingand grinding going backwards also the wheel locks up in reverse transfer case or diff easy fix or not fix myself or not when my wife was driveing it the front pass steer would lock up on her it also would automaticlygo in to 4wheel drive
Had an issue similar to this with a customer astro van. It was the front differential that destroyed itself. We took the front driveshaft off and he drove it like that for a while. Then sold it. So, I am not sure what happened inside that front axle, but is was locked up. As long as we took off the driveshaft, the spider gears were the only thing spinning internally. So it could be driven again.
SOURCE: replace a outer cv boot
There are aftermarket boot kits you can purchase. If the tear isn’t bad. You can clean the boot with rubbing alcohol. Then cover with a small amount of RTV. Allow the RTV to cure for at least 12 hours.
SOURCE: cv joints wont come out of diff housing (95 Rodeo 4x4 diesel)WHY
You might have to remove the diff cover and remove the lock rings from inside the diff.
SOURCE: 99 Silverado 4-wheel drive not engaging
It does not seem that sufficient diagnosis was done. No, you cant give a specific diagnosis like that without tearing unit down. It's likely that they told you the most common failure and left it at that. Likely there is a problem with your unit...I think this becomes more of a trust issue than a mechanical one. A second opinion from an independent reputable shop may help but either way, you need to have it fixed. In not using it much, it makes me wonder how it got worn.
good luck
SOURCE: Ford F150 4x4 Passenger side hub
is the sound like a gear jumping noise?if so check the hub assembly and the spline inside the front differential........more than likely the hub assembly
SOURCE: 01 gmc sonoma front diff leaking near the cv shaft
faulty seals are the common culprits for this. You may want to take the axle out to have it replaced and check the extent of the damage.
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