Gary Z

What type of pinion seal is best for the GM 10-bolt? I have a 2002 Z28 whose pinion seal leaked from day one. I have my rearend apart now to install 3.73s and I want also to eliminate the leak. Part of my problem is that I can’t see why the original seal leaked – it appears to be undamaged. The replacement seal I purchased (Federal Mogul) is a different design than the original seal. Is some particular type or brand known to be best?

TIA, Gary

Damage Inc.

iTrader: (7)

TTT for ya bro.

99huggerorangeZ

iTrader: (2)

mines leaking to but its not bad but im gonna have it taken care off when i have my rear diff flushed and install my TA cover

Cummins

iTrader: (2)

Mine leaked when i got my car also. I thought it was because it gets parked 5 months outa the year. replaced it with a seal i picked up from Napa (dunno the brand or material) and it hasnt leaked in a year.

Slowhawk

iTrader: (12)

You can help it by installing a solid crush collar.I haven't seen one that doesn't leak yet.

Jorday

The pinion seal on the Z28 leaks. My old car was a 2000 T/A, and the stock seal leaked on that also. I installed 4.10 gears in that car and replaced the pinion seal while I was at it and still leaked. I took it apart again and packed some real thick grease in and around the seal and it made it stop leaking.

JackZ28

Does the pinion seal look like a washer?

Raven

You can add my car to the leaky pinion seal group Mine has been leaking for a while, though I had no problems with it for over four years before it started to leak. I plan on getting it fixed this week though - hopefully it wil stay fixed :crossedfingers:

Mike's02Z28M6

The dealership I brought my car to said it was common and it was called, "sweating." He said it wasn't actually leaking, just sweating. After I thought about it, I've never had a drop of rear end fluid hit the pavement where my car has sat. It just seems to, sweat, I guess.

00bluehawk#111

iTrader: (1)

most leaks are caused by ---1 not lubing seal during install and----- 2 clogged vent in the rear to allow fuid to expand and air to vent when heated... hope this helps

00Streak

Mines sweating as well. but no matter the 10-bolt's days are numbered now that the 9" is in the garage.
S

VoodooWS6

Sweating? God these delears are really starting to kill me....What a crock of ****!

Mine leaks, it is normal...but sweating? come-on!

Gary Z

This is valuable information from one who obviously knows his stuff - thanks again, bluehawk.

VSGLS1

iTrader: (8)

Mine isn't leaking, but the cover was.

TaTommyWS6

Yup, mine leaked from day one, I had it replaced with my 4.10 install, and it leaks again... My installer was top notch, and it still leaks....

Ahhhh. who cares!

Tommy

00 Z-28

iTrader: (9)

I had a 2000 Z28 w/M6. Mine leaked from day one. When I got my 3.73's put in the installer (Pyle Brothers) recommeded installing a yoke kit also(has a outer seal on it), besides the new pinion seal. Never leaked afterwards.

Kenafin_02TA

The Firehawk was leaking when we bought it with 700 miles on it....oh well..already blew that rear...have another 10-bolt in there and are just waiting until we can order a 12 bolt.

The WS6 has never leaked...43,xxx miles now...oh well if it ever does cause it's eventually going to have a 12 bolt too...

Assassin

iTrader: (3)

mine leaked since day 1, replaced and leaked after that too, I even thought about cleaning the spary of oil off from underneath the car but I notice its working as a pretty good rust inhibitor so I'll let it be for now, lol

97M6Formula

iTrader: (6)

Thats why I dont mind
Im on my 4th seal now I think im just gonna give up on the whole thing kinda like my timing cover....the cars dont run right unles they leak something

y2k_ta

iTrader: (80)

Leaking seal club member here too I just top it off with more fluid every once in a while.