Hi all,
I'm wondering if you could point me in the right direction on this?
My Chevelle has a GM 8.2 10 bolt rear, with some type of posi installed - not sure which one it has. I'd kinda like to keep it for the time being, until I'm ready to really upgrade.
Since I've had the car, it's had an issue where in tight turns (like in parking lots), the wheels will squeak. It's as if the posi is not releasing at all, and instead acts like a solid rear axle. Every once in a while, it will work like I'd expect (usually on hot summer days when the wheels probably grip a little better than usual - I can actually feel it break loose and slip, and the tires stay quiet), but almost every time, the tires will squeak on tight turns. It doesn't seem to have any other issues - no noise or anything.
From what I've read, it sounds like the issue could be that the friction modifier might either be missing, or not enough of it is present. So, I drained and refilled with a Red Line gear oil that includes it. In the one short drive I've taken, though, it doesn't seem to have changed anything - the tires still squeak in tight turns. I'm not sure if this means anything yet, because I only got the differential to where it barely feels warm.. but I was really kinda hoping that would just instantly fix it :|
My question is, does it take time for the new oil to work its way into the posi? Maybe I should just wait longer, and see if it starts working normally? If so, how long should it take?
If this oil doesn't do it, would it make sense to try adding more friction modifier? Is there something else that can go wrong with these, that causes them to be overly sticky like this?
I'm wondering if you could point me in the right direction on this?
My Chevelle has a GM 8.2 10 bolt rear, with some type of posi installed - not sure which one it has. I'd kinda like to keep it for the time being, until I'm ready to really upgrade.
Since I've had the car, it's had an issue where in tight turns (like in parking lots), the wheels will squeak. It's as if the posi is not releasing at all, and instead acts like a solid rear axle. Every once in a while, it will work like I'd expect (usually on hot summer days when the wheels probably grip a little better than usual - I can actually feel it break loose and slip, and the tires stay quiet), but almost every time, the tires will squeak on tight turns. It doesn't seem to have any other issues - no noise or anything.
From what I've read, it sounds like the issue could be that the friction modifier might either be missing, or not enough of it is present. So, I drained and refilled with a Red Line gear oil that includes it. In the one short drive I've taken, though, it doesn't seem to have changed anything - the tires still squeak in tight turns. I'm not sure if this means anything yet, because I only got the differential to where it barely feels warm.. but I was really kinda hoping that would just instantly fix it :|
My question is, does it take time for the new oil to work its way into the posi? Maybe I should just wait longer, and see if it starts working normally? If so, how long should it take?
If this oil doesn't do it, would it make sense to try adding more friction modifier? Is there something else that can go wrong with these, that causes them to be overly sticky like this?