View Full Version : Hole in Differential cover???

11-03-2010, 06:47 PM
Hey all. I was just out driving today, and at some point something put a hole in my rear differential cover. I'm not sure when, and the only reason I noticed it was the rear end was covered in gear oil when I got home. So it happened sometime within a 30 mile span between my friends house and my house.

But I didn't notice anything out of the ordinary when driving. And it still continued to drive fine. So I'm wondering what on earth could have put a hole in it? And what should I be looking for when I get the cover off to replace it? And does anyone know where I could get a new diff cover? Money and time are both kind of a key issue right now. So any and all help with be appreciated.

11-03-2010, 06:58 PM
Diff cover - we have them around in the yards here in Shreveport / Bossier City LA, so I'd check the U-Pull-Its.

Also, ask in the "Wanted" forum here.

How far up is the hole?

Things to watch for - Well, since you have to remove the rear diff bracket to remove the cover, don't try this on ramps ...put it up on jackstands or a lift.

And take the load off the tires when you do! (Jackstands under the spring perches should be OK with the normal spring perch - jackstand caveats)


11-03-2010, 07:01 PM
Thanks, any idea how much they sell for used?

And the hole is a little bit above the rear diff bracket and off to the drivers side of the car a little.

11-03-2010, 07:13 PM
The whole pumpkin is $45 at the local U-Pull-Its.

That might be a good time to change gears, BTW - take the gear chart from the articles link ( www.sccoa.com ) and find a gear set more to your liking.

Alas, I bet the gear ratio you want will be open - and the tracloks will be the wrong gears - but hey, won't hurt to look :p


11-03-2010, 08:20 PM
Assuming corrosion was not the cause, it may be that the cover fractured from stress. Not an unusual occurrence on these cars, especially if you experienced some wheel hop.

11-07-2010, 11:47 PM
well I took it all apart and found the culprit. It seems that whoever put the 3.55's in the car before I bought it didn't use the right bolts to mount the ring gear to the trac-lok unit. So about 5 of them fell out completely and atleast 1 shot out of the cover. The ones still left in stripped when i took them out so clearly they weren't of good quality.

I got an entire pumpkin for $100 from a local junk yard only problem is that it's an open diff instead of the trac-lok and some of the holes on my old one are a little screwed up from the bolts coming out of it. So my question now is, can I still use my old trac-lok since the bolt heads would still more than cover the holes even though some of them got somewhat messed up?

I'm just not trying to have a 1-tire fire SC through winter this year.

Thanks all

11-08-2010, 12:09 AM
It's a crying shame you're not down here.

$45 a pumpkin for the IRS machines, no matter what ratio or TL/open - or even aluminum/steel!

(Don't remember any 3.55 TLs, but still ... )


11-08-2010, 12:19 AM
the 3.55 was aftermarket but I didn't want it to begin with I wanted a 3.27 or maybe a 3.08 because I do quite a bit of highway driving and I have a 5-speed SC.

But I know I wish I could have found one that cheap. $100 was as low as it got around here, all the other places were between $250 and $475 for a used one.

But I'm okay with this one being an open diff and all, I just want to use my old TL in it. I'm just happy I managed to find one for a price I could afford, with a gear ratio I'd rather have and it still had abs and all that.