rear end leaking

9430250 · Aug 2, 2005

well to make a long story short, my "pumpkin" was used to jack up my car and the result is a leak. Not my doing, but it looks like I will be repairing it. What kind of money am I looking at spending. Here's a pic of the damage, not much, but it is leaking. Any help would be great.

iwannarace67 · Aug 2, 2005

Yeah I had the same thing happen. Go to your local parts store buy some gear oil, friction modifier and some black RTV, I used Toyota FIPG but I'm a differant case. Take the cover off, use a long 3/8 extension and small ball-peen hammer to flatten out the bent part. Then clean the surfaces, use a lil carb clean and a razor on the diff housing, a wire wheel will work best on the cover. Apply a generous amount of RTV to cover, reinstall and then give it lil time to set (some people don't do this, I do). Then refill with gear oil and 4oz of friction modifier and your done. Really not much, might take a lil over an hour if you've never done it before.

9430250 · Aug 2, 2005

thanks that what I needed to know. Damn tire dealer did it then refused to admit it. Last business they get from me.

forpit2000gt · Aug 2, 2005

should be under $30.00 to do. make sure to get the friction modifier, I usually get it from Ford but auto parts store will have something as well. Maybe upgrade to synthetic if you want.

twogts4us · Aug 2, 2005

For $28.95, you can get the FMS chrome cover - http://store.summitracing.com/default.asp?target=sitemap2.asp&N=400158

hotdog71 · Aug 3, 2005

well that sucks,
but you would do well to change it for a stronger one like FRPP pumpkin or some other make. They run something like $200 and it only take 30 mins to fit.
Just to make the rear end more solid.

9430250 · Aug 3, 2005

hotdog71 said:
well that sucks,
but you would do well to change it for a stronger one like FRPP pumpkin or some other make. They run something like $200 and it only take 30 mins to fit.
Just to make the rear end more solid.

Link? is it the one that used to say Ford SVO on the back?

Kilgore Trout · Aug 3, 2005

Do not use gear oil go to the Ford Parts counter and get the correct 75W-140 synth and just get the friction modifier there as well...

Torinalth · Aug 3, 2005

if you get a new cover i would get the mac BBK, or the SVO... will cost a bit more, but if you are going to replcae, might as well get something that is better.

its really easy to work on, but filling it can be a massive pain. get a syringe or a pump to get the oil into the pumpkin.

Torinalth

forpit2000gt · Aug 3, 2005

Kilgore Trout said:
Do not use gear oil go to the Ford Parts counter and get the correct 75W-140 synth and just get the friction modifier there as well...

I personally run Mobile One synth., why not run gear oil? I have put it in 20 plus rearends with no problems, I do use the ford friction modifier but have also used the Auto Zone brand or whatever brand they sell in the tube.

MT1083 · Aug 3, 2005

You can get the FRPP cover for about $160 through a dealer I know of in MN. Randy Stinchcomb on here also might carry them at a good price.

Kilgore Trout · Aug 3, 2005

forpit2000gt said:
I personally run Mobile One synth., why not run gear oil? I have put it in 20 plus rearends with no problems, I do use the ford friction modifier but have also used the Auto Zone brand or whatever brand they sell in the tube.

There is a tag on the 99+ diffs that specifically says "Use 75W-140 Synth Only". That is what I based my recommendation on...

rjstaaf · Aug 3, 2005

Kilgore Trout said:
There is a tag on the 99+ diffs that specifically says "Use 75W-140 Synth Only". That is what I based my recommendation on...

forpit2000gt said:
I personally run Mobile One synth., why not run gear oil? I have put it in 20 plus rearends with no problems, I do use the ford friction modifier but have also used the Auto Zone brand or whatever brand they sell in the tube.

Pssst hey Kilgore Trout and forpit2000gt, you guys are talking about the same thing It is just semantics, Mobil calls it Gear Lube.

Mobil 1 Synthetic Gear Lube LS 75W-140

http://www.mobiloil.com/USA-English...il_1_Fully_Synthetic_Gear_Lube_75W-140LS.aspx

I change mine every year and Mobil 1 75W-140 is hard to find around here so I just run Motorcraft High Performance 75W-140 and friction modifier in mine. It is 100% fully synthetic.

SAE 75W-140 High Performance Rear Axle Lubricant

http://www.fcsdchemicalsandlubrican...cant&category=Transmission, Axle and Steering

Don't forget the Additive Friction Modifier

http://www.fcsdchemicalsandlubrican...fier&category=Transmission, Axle and Steering

rjstaaf · Aug 3, 2005

Here is one of the best articles I have seen on changing the rear diff fluid.

http://www.bullittarchive.com/html/modules/articles/article.php?id=71

I wouldn't mess with the aftermarket covers unless you are putting down enough power to need one. With a little bit of elbow grease and metal polish you can get more than enough bling out of the stock cover

forpit2000gt · Aug 3, 2005

I understand about the synthertic thing, but still had put together many 8.8 without synth. An 8.8 diff. has been pretty interchangable with internal parts for a long time and didn't always have synth. lube recommended. There are a bunch outh there with Coastal brand and others that have been and will be fine. Does anyone know why Ford started recommneding synth. Bearing wear , heat??? Also, a lot of rears from the Factory are at least 1 quart lower than what you put back in to the fill hole.

timeless2 · Aug 3, 2005

for a rear end leak ==> Depends adult undergarments...

forpit2000gt · Aug 3, 2005

git-it-83 said:
for a rear end leak ==> Depends adult undergarments...

Thats a good idea for the long waits in the staging lanes..

mity2 · Aug 3, 2005

twogts4us said:
For $28.95, you can get the FMS chrome cover - http://store.summitracing.com/default.asp?target=sitemap2.asp&N=400158

I've done same thing. I thought it was going to leak, and i went out and got Ford OEM cover for 35 bucks, only to see Chrome FRRP cover cheaper at the Carlisle

9430250 · Aug 3, 2005

rjstaaf said:
Here is one of the best articles I have seen on changing the rear diff fluid.

http://www.bullittarchive.com/html/modules/articles/article.php?id=71

I wouldn't mess with the aftermarket covers unless you are putting down enough power to need one. With a little bit of elbow grease and metal polish you can get more than enough bling out of the stock cover

thanks that is exactly what I need. I knew I could count on you guys!

hotdog71 · Aug 3, 2005

From page 128 FRPP cat.

AXLE GIRDLE
M-4033-G1 8.8" Ford
• Lightweight 356T6 aluminum casting
replaces rear cover on 8.8"
• Load bolts provide additional support
for differential bearing caps
• Increase ring and pinion gear life
• Stud kit M-4034-A recommended
for 8.8" and Dana 60
NOTE: Check exterior clearance
to chassis/suspension.

rear end leaking

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