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trans. rear seal?

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Old May 27, 2009 | 10:45 PM
  #1  
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papajoemrt
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trans. rear seal?

2002 f150 screw fx4 5.4
(not sure about the trans sorry)

there is a noticeable leak in the rear of the transmission. From what I can see it is coming out where the drive shaft yolk meets the output shaft of the trans. I also suspect that there may be a leak in the trans to transfer case area.

any help with this please? heard this one could be a bit of tough one to replace.
 
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Old Jun 1, 2009 | 11:58 PM
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Well, the leak where the drive shaft goes into the t-case is easy. Just pull the drive shaft out, you will need a 12mm 12point socket and is easiest with a swivel. Just use a large screwdriver or a seal puller to pull out the seal coming out of the tail housing and carefully tap in a new one. For your other leak, the t-case will have to come out and there is a this paper-like seal that is in between there that needs to be replaced. While you are under there, you have a good excuse to replace the t-case fluid as well as the transmission fluid depending on how long it has been. Let us know how it turns out and good luck!!
 
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Old Jun 1, 2009 | 11:59 PM
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By the way, your trans is a 4r70w.
 
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Old Jun 2, 2009 | 10:38 PM
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thanks. the leak isn't that bad i just notice that the rear of the trans has a wet look and so does the tcase. i just changed the transfer case fluid and the trans fluid has been about a year since we put in a transgo shift kit. it doesn't leave a drop on the cement but i'm sure that it is bound to go soon just like my ball joints just did.


thanks for your reply.
 
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Old Jun 3, 2009 | 09:33 AM
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You either have the 4r100 or the 4r70w.
 
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Old Jun 3, 2009 | 04:33 PM
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thanks i'll look to see for sure.

what's the difference in the transmissions anyway besides the number?
 
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Old Jun 3, 2009 | 06:35 PM
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Well the E4OD is quite a bit larger than the 4R70W, it was also used behind the 7.3 Powerstrokes. Also the 4R100 is basically the same as the E4OD, I believe after 99 or 2000 they changed the name to 4R100.

The 4R70w oil pan is basically square and the E4OD/4R100 looks like this

http://store.summitracing.com/partde...5&autoview=sku
 
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Old Jun 4, 2009 | 11:42 PM
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ok thanks, i have to get an alignment after spending the whole day doing ball joints (first side a good 7 hours) the other (3 hours).

going to fords to have it done have them check the trans because they flushed the tranny last time and i checked it cold and the fluid is all the way up to the top of the do not add part, which i think was a sign of why it's seeping out the back.
 
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