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changing pinion seal, what size socket?

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Old 04-29-2014, 08:02 PM   #1
moosestang
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Default changing pinion seal, what size socket?

i tried goggling it and I see two different answers? Is it 1 1/8 inch or 1 1/16?
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Old 04-29-2014, 08:57 PM   #2
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Quote:
Originally Posted by moosestang View Post
i tried goggling it and I see two different answers? Is it 1 1/8 inch or 1 1/16?
I'm not sure which it is ..... yet ..... but it looks like I will know pretty soon.

My '08 is leaking just a hair there as well, seems to be a common malady some how? I have a '01 Mercury GM and '92 and '95 Thunderbirds all with 8.8 rears and not a drop but this '08 Mustangs is leaking.


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Old 04-30-2014, 06:26 AM   #3
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It's looking like 27mm or 1 1/16 is correct. I might have both, I know I have 1 1/8.
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Old 04-30-2014, 07:59 AM   #4
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it's a big ****... had to get one from the hobby shop when I put the Alum D/S flange on lol
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Old 04-30-2014, 02:01 PM   #5
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Well I had to spend the first half of the day at the dentist, so it looks like Friday I will start on it. I probably need to remove my mid mufflers to give me enough leverage room to get the pinion nut off, so this will give me all day Saturday to finish up.

Got a 27mm socket from lowes for $7. bottle of white out from CVS for $2.99 to mark everything. I'm going to count turns and put the nut back on just how it came off.

I had to get the pinion seal from ford, discount auto told me it was dealer only.

My leak was most likely cause by my clogged vent. The vent would puke oil and my dirt road would stick to it like glue. I'm going to pull the vent and see if I can't rip the top cap off and install a length of hose.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Last edited by moosestang; 04-30-2014 at 02:22 PM.
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Old 04-30-2014, 03:21 PM   #6
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Impact gun makes the removal MUCH MUCH easier
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Old 04-30-2014, 05:21 PM   #7
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Quote:
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Impact gun makes the removal MUCH MUCH easier
If I had one, then I might use it. still wouldn't want to use it to tighten it back. It'd be to easy to go past the original spot.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 04-30-2014, 09:19 PM   #8
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Quote:
Originally Posted by moosestang View Post
Well I had to spend the first half of the day at the dentist, so it looks like Friday I will start on it. I probably need to remove my mid mufflers to give me enough leverage room to get the pinion nut off, so this will give me all day Saturday to finish up.

Got a 27mm socket from lowes for $7. bottle of white out from CVS for $2.99 to mark everything. I'm going to count turns and put the nut back on just how it came off.

I had to get the pinion seal from ford, discount auto told me it was dealer only.

My leak was most likely cause by my clogged vent. The vent would puke oil and my dirt road would stick to it like glue. I'm going to pull the vent and see if I can't rip the top cap off and install a length of hose.
Which advance did you go to? I work at one in Gainesville and I know for sure we have them because I just recently looked up how much one is at work because my 05 GT leaks a little from the pinion seal too.
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Old 05-01-2014, 02:37 AM   #9
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Quick question? I just had my pinyon seal replaced last month, maybe due to lowering and or the vent clogged, I also lived on a dirt road till a few weeks ago. Can you get to the vent from the outside of the axle, or have to come though the inside of the pumpkin axle housing? I know (if I remember correctly) it's a bout a foot over from the center diff on the passenger side. But I haven't been under there to inspect in a while or look at it closely, I want to clean this thing out ASAP! And also, if you haven't figured out the socket size I would just go to sears or ace hardware ect... And buy a few sizes and just return the ones you don't need, or return all of them when you done haha
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Old 05-01-2014, 02:21 PM   #10
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Quote:
Originally Posted by drewsky View Post
Quick question? I just had my pinyon seal replaced last month, maybe due to lowering and or the vent clogged, I also lived on a dirt road till a few weeks ago. Can you get to the vent from the outside of the axle, or have to come though the inside of the pumpkin axle housing? I know (if I remember correctly) it's a bout a foot over from the center diff on the passenger side. But I haven't been under there to inspect in a while or look at it closely, I want to clean this thing out ASAP! And also, if you haven't figured out the socket size I would just go to sears or ace hardware ect... And buy a few sizes and just return the ones you don't need, or return all of them when you done haha
It just unscrews from the top of the axle tube. I think it's a 13mm wrench, maybe smaller. I took mine out before to make sure I could blow through it.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 05-01-2014, 02:23 PM   #11
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Quote:
Originally Posted by Carcrazycorey1 View Post
Which advance did you go to? I work at one in Gainesville and I know for sure we have them because I just recently looked up how much one is at work because my 05 GT leaks a little from the pinion seal too.
The one in Alachua, I moved to Alachua about 6 months ago. No sweat, the Ford one might be better, who knows.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 05-01-2014, 09:17 PM   #12
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We stock it at our Advance, both in National and Driveworks lines. I bought the National #3604 seal myself couple weeks ago. It's very common, used in a ton of Fords.
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Old 05-02-2014, 06:29 PM   #13
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It's 1 1/16th! turns out I had the socket the whole time, so now I have a 27mm for nothing. 27mm will work, but it's a tad loose compared to 1 1/16th.

I got it up in the air and drive shaft off. Everything is marked and I'll be turning the nut tomorrow morning. I'll make a little video, probably be some curse words.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 05-03-2014, 06:23 PM   #14
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Nut came off easier than I thought, so did the pinion flange. getting the seal out took some doing, but slowly working around it with a flat blade screw driver did the trick. The seal looked to be in good shape.

I made a video of some of the steps, but this is hardly a how too.

https://www.youtube.com/watch?v=tqZ0...ature=youtu.be
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 05-04-2014, 04:05 PM   #15
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New seal is working well. Pulled the stock vent fitting today and got a nice little poof of pressure come out the axle. For those that haven't seen it, this is what it looks like on a 06.

Click the image to open in full size.

this is what it looks like without the cap.

Click the image to open in full size.

Under that cap was a piece of rubber. Since the stock vent puked oil anyway and obviously it allows pressure to build, i decided to run a 2 foot length of 3/8 nylon tubing and zip tied it to the gas tank vent tubes under the trunk.

Click the image to open in full size.

this is what it looks like with the axle at ride height, I installed it with the axle hanging down.
Click the image to open in full size.

Click the image to open in full size.

I can't imagine it will build up pressure now, that's a large opening in that fitting. I swear i have less gear whine after changing the pinion seal.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 05-04-2014, 07:18 PM   #16
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I didn't think about that vent cap being like that.

I know my other Fords don't leak at the pinion seal, only this '08 Mustang. I know a couple have the rubber tubes, specifically my '77 F150, the '07 F150, and the '01 Mercury GM. Not sure about the two T-birds, they have fixed center sections and CV axles being independent rears.

I think I may give it a good cleaning and try this vent mod and see how that goes. I can do the seal later if it shows signs of leakage then, currently it never leaves any drops under the car, I just see where it slung a little when I am underneath .... like would maybe happen if a vent was not venting and pressure built up.
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Old 05-04-2014, 07:47 PM   #17
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Looks good moose. I had mine done about a year ago. Pinion seal is a common failure on our cars i think
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Old 05-05-2014, 03:42 PM   #18
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I'm happy to report no more oil puking problems from the vent tube! I wish I had done that years ago.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

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Old 05-05-2014, 03:42 PM
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