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Fox output shaft seal

  • Thread starter Thread starter mattys91gt
  • Start date Start date Aug 23, 2022
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mattys91gt

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Aug 23, 2022
#1
  • Aug 23, 2022
  • #1
I have a leak from the seal that the driveshaft goes into the front of the car it's a aod 91 I got a seal today and I'm not sure if it's correct here's a picture of old and new
 

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90sickfox

Wasn't a pretty sight...and I've got big hands
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#2
  • Aug 23, 2022
  • #2
Is it a 5 speed or an automatic ? This is the seal I use for 5 speed and automatic cars.



They do make different ( universal ) ones that they say work but this national seal matches the factory design.
 
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mattys91gt

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Aug 23, 2022
#3
  • Aug 23, 2022
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it's a aod transmission automatic and is this it I have a advance auto near me
 

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90sickfox

Wasn't a pretty sight...and I've got big hands
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#4
  • Aug 23, 2022
  • #4
mattys91gt said:
it's a aod transmission automatic and is this it I have a advance auto near me
Click to expand...
That one will be easier to tap in. The one I posted is for 5 speed or AOD. The one you show looks better than the first one. I like the extra dirt boot length.
 

mattys91gt

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Aug 24, 2022
#5
  • Aug 24, 2022
  • #5
90sickfox said:
That one will be easier to tap in. The one I posted is for 5 speed or AOD. The one you show looks better than the first one. I like the extra dirt boot length.
Click to expand...
now what should I use to get it to go in I thought my Toyota oil filter cup would fit ,it might on the new one but the old one I had no luck,what size socket or tool
 

General karthief

wonder how much it would cost to ship you a pair
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#6
  • Aug 24, 2022
  • #6
mattys91gt said:
what should I use to get it to go in
Click to expand...
I don't know what do you think @Noobz347
 
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mattys91gt

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Aug 24, 2022
#7
  • Aug 24, 2022
  • #7
General karthief said:
I don't know what do you think @Noobz347
Click to expand...
I haven't got this seal yet to try but I swear the seal that came out is to a t5 and this seal is wrong on the right I could be wrong
 

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General karthief

wonder how much it would cost to ship you a pair
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#8
  • Aug 24, 2022
  • #8
mattys91gt said:
I haven't got this seal yet to try but I swear the seal that came out is to a t5 and this seal is wrong on the right I could be wrong
Click to expand...
can't tell without a part number.
 

mattys91gt

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#9
  • Aug 24, 2022
  • #9
General karthief said:
can't tell without a part number.
Click to expand...
I'll post both and looking at the box it's definitely wrong
 

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90sickfox

Wasn't a pretty sight...and I've got big hands
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#10
  • Aug 24, 2022
  • #10
7692s is the part number for the National one.

I have all types of stuff to fit these seals. A piece of PVC pipe or straight cut metal pipe. I use adapters from my balljoint install kit.

I smear some rtv around the back metal part of the seal that seats in the back of the transmission. You can lightly tap one in with a small hammer keeping pressure on the opposite side with your hand. Just tap around evenly side to side.

Make sure to put some fresh transmission fluid on the end of the driveshaft when you put it back together.
 
Last edited: Aug 24, 2022

mattys91gt

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#11
  • Aug 24, 2022
  • #11
90sickfox said:
7692s is the part number for the National one.
Click to expand...
I want to make sure I have the right seal so when you pull the drive shaft out it's the seal at the front of the motor with the output shaft sticking out
 

mattys91gt

Active Member
Feb 3, 2022
391
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Aug 24, 2022
#12
  • Aug 24, 2022
  • #12
90sickfox said:
7692s is the part number for the National one.

I have all types of stuff to fit these seals. A piece of PVC pipe or straight cut metal pipe. I use adapters from my balljoint install kit.

I smear some rtv around the back metal part of the seal that seats in the back of the transmission. You can lightly tap one in with a small hammer keeping pressure on the opposite side with your hand. Just tap around evenly side to side.

Make sure to put some fresh transmission fluid on the end of the driveshaft when you put it back together.
Click to expand...
now should the shaft have a little bit of a wiggle or do I have more issues inside? I need to take the inspection plate off and look around and I tried a piece of pipe from my exhaust kit but did we figure out if that's the wrong seal I have
 

90sickfox

Wasn't a pretty sight...and I've got big hands
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#13
  • Aug 24, 2022
  • #13
There's a bushing inside that the yoke rides in. If that bushing is worn it'll cause the seal to leak. The only real way to check that is to slide the driveshaft yoke in and test for play. A little is ok but hard to mesure without a dial inicator. I've had nothing but bad luck with the shorter seals. That's why I use the ones I posted.
 

mattys91gt

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#14
  • Aug 24, 2022
  • #14
90sickfox said:
There's a bushing inside that the yoke rides in. If that bushing is worn it'll cause the seal to leak. The only real way to check that is to slide the driveshaft yoke in and test for play. A little is ok but hard to mesure without a dial inicator. I've had nothing but bad luck with the shorter seals. That's why I use the ones I posted.
Click to expand...
I guess it's the oil pump seal the guy called it at the store I'll bring my old one and match it up and see
 

General karthief

wonder how much it would cost to ship you a pair
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#15
  • Aug 24, 2022
  • #15
Are you fixing a leak at the bell housing or where the drive shaft enters the trans at the back of the trans?
 

mattys91gt

Active Member
Feb 3, 2022
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Plymouth Massachusetts
Aug 24, 2022
#16
  • Aug 24, 2022
  • #16
General karthief said:
Are you fixing a leak at the bell housing or where the drive shaft enters the trans at the back of the trans?
Click to expand...
at the bell housing
 

General karthief

wonder how much it would cost to ship you a pair
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#17
  • Aug 24, 2022
  • #17
If you have oil dripping from the inside of the bell housing you have to pull the trans to replace the torque converter seal.
you need to proof read your posts, others on this thread are posting about replacing the drive shaft seal which is at the back where the drive shaft yoke enters the trans.
If you are taking it to a shop to get the leak fixed let them get the seal, they can pull the seal and match the part numbers if there is any questions.
When I hung out at my friends shop and had customers bring their own parts most times it was wrong and they wanted us to wait for them to get the right parts so we (alot of times) had a repair bay tied up for hours, sometimes days, waiting for them to come back. It was annoying and costly.
 

mattys91gt

Active Member
Feb 3, 2022
391
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Plymouth Massachusetts
Aug 24, 2022
#18
  • Aug 24, 2022
  • #18
General karthief said:
If you have oil dripping from the inside of the bell housing you have to pull the trans to replace the torque converter seal.
you need to proof read your posts, others on this thread are posting about replacing the drive shaft seal which is at the back where the drive shaft yoke enters the trans.
If you are taking it to a shop to get the leak fixed let them get the seal, they can pull the seal and match the part numbers if there is any questions.
When I hung out at my friends shop and had customers bring their own parts most times it was wrong and they wanted us to wait for them to get the right parts so we (alot of times) had a repair bay tied up for hours, sometimes days, waiting for them to come back. It was annoying and costly.
Click to expand...
that's my fault I didn't know what the part was called what I'm seeing is above the transmission it's flinging fluid right where that seal is I'm stopping by the tranny shop now to see what he says and can I post videos on here or only pictures
 
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7991LXnSHO

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#19
  • Aug 24, 2022
  • #19
mattys91gt said:
I have a leak from the seal that the driveshaft goes into the front of the car it's a aod 91 I got a seal today and I'm not sure if it's correct here's a picture of old and new
Click to expand...
The driveshaft connects the transmission and the rear differential. Oops.
 

mattys91gt

Active Member
Feb 3, 2022
391
26
38
Plymouth Massachusetts
Aug 24, 2022
#20
  • Aug 24, 2022
  • #20
mattys91gt said:
that's my fault I didn't know what the part was called what I'm seeing is above the transmission it's flinging fluid right where that seal is I'm stopping by the tranny shop now to see what he says and can I post videos on here or only pictures
Click to expand...
yes I do have oil dripping at the inspection plate
7991LXnSHO said:
The driveshaft connects the transmission and the rear differential. Oops.
Click to expand...
it's my first mustang I wanted one my whole life and all my time working in autobdy shops and automotive shops I never learned how to work on older cars I try not to ask on here because I sound stupid not knowing what part is what I always try to ask a friend or the internet I'll post more pictures then ask questions,all my friends gave up on mustangs years ago so I only have a few ppl to ask
 
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