bluegoose177

Just bought a 95% stock ls1 t/a a couple months ago. The past week I've been hearing a metallic noise underneath the car about every two seconds when coasting in 2nd and 3rd gear. Checked underneath as best as I could and noticed my rearend has a slight leak. Just need gear oil and a new seal or a new rearend?

White6SpdZ28

iTrader: (6)

Probably have to open it up to see if any of the gears are messed up. Not a difficult job. The pinon seal is prone to leaking. Mine did on my 10 bolt and I replaced the seal. Did ok for a bit then started seeping again. Upgraded to a 9in after that

bluegoose177

Ok thanks, I'll check it out

Burken01

iTrader: (88)

Yes open your rear end pumpkin, there is a magnet on the other side of the cover... You'll know if your gears are shot out if there is a bunch of metal on it.. Plus it will be visual by looking at the gear itself..

If all is well, autozone sells new gaskets.. Use a little high temp rtv sealer on the gasket they give on both sides...

garygnu

pull the filler plug and check for fluid level .some good mechanics can install a new pinion seal with the rear still in the car,if the ring gear and internal stuff looks ok.

bluegoose177

Ok, thanks. Also I've done a little research today and usually bad rear ends have a constant grinding noise, right? Mine hasn't grinded at all, It just has a slow little knock. Could it be an axle? And what's the best gear oil to use?

DirtyBirdMKE

Pull the cover
Check for meta on magnet
Inspect gears
Have someone put in a new pinion seal
put back cover with gasket and RTV

Use Redline 75/90 Gear oil (already has LSD Additive)