6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHhow to dignose question for you guys!
Reported or suspected cause
possible in the front diff?
Reported cause
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Reported cause · Original poster
thats why a problem is possible in the front diff?.
Leading evidence: 'possible in the front diff?' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'possible in the front diff?' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace left front bearing' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
In my case, there was a faint growl that changed tone with speed.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed
The tires checked out OK, so he placed the car on a lift, then ran the car with all four wheels spinning, like your's did.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
How do you diagnose a bad differential or transaxle. What do you look for or hear for to locate it as a problem. And also, is it true that a bad wheel bearing makes a really loud noise? All right, lets see what you all think. TIA everyone
The way I found my front diff was bad was a very small leak of oil taht ended up dispersed under the bumper...discovered while I was getting PPS9s installed. Completely covered and replaced under warranty.
Depending on where the wheel bearing is it'll either sound like bodies bouncing in your trunk (refer to a
front engine
car, mind you! ) Or it will sound like the marble rolling smoothly around the inside surface of a coffie can. Also, depends on the severity, could be loud, or not so.
-the (automotive student) kid
wross996tt, yours is 4wd correct? thats why a problem is possible in the front diff?. mine is C2. one mechanic heard with stethoscope and said it was coming from differential. another mechanic said sounded like wheel bearing. The noise started after this incident:
I turned right and misjudged the curb and whacked the right rear rim pretty good. (took a chunk of rim off actually) (I laugh about it now but I was in tears at that moment) I still run the 265/35/18 tires where the rim sticks out more than the tire. I am more inclined to believe that it is a bad wheel bearing, especially cause it is cheaper to fix than diff. I tested with the car off the ground and the engine/tires running (tested up to 45 mph) no noise from the tires at all.
are bad diffs are common thing with 99 c2's?
Thanx
I would think that testing a wheel bearing with the wheels elevated probably isn't the best way....unless you want to see if there is play. There is no weight on the bearing and may not make noise even if it is worn. Try driving it and see if the noise goes away/worsens if you turn right vs. left. This will load the bearing (inner vs. outer surfaces)
My left front bearing has been replaced. In my case, there was a faint growl that changed tone with speed. Took the tech guy for a ride, and he thought it may be tires. The tires checked out OK, so he placed the car on a lift, then ran the car with all four wheels spinning, like your's did. Localized the noise to the left front wheel with a stethoscope that looked like a directional mike stuck to his ears. If your guy with the stethoscope said the noise is coming from the diff, I'm afraid that's where your problem is.
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