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Front seal on T-5 - Fixing it right the 1st time

  • Thread starter Thread starter Darkwriter77
  • Start date Start date Sep 23, 2005

Darkwriter77

Resident Ranting Negative Nancy
5 Year Member
Jul 1, 2005
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281
134
Apache Junction, AZ
Sep 23, 2005
#1
  • Sep 23, 2005
  • #1
Okay, so I'm sitting here, staring at this pile of fresh goodies that's waiting to go in the Horsey: King Cobra clutch kit ($169 from UPR), new Fenco flywheel ($70 Autozone), a couple cans o' brake cleaner ($8), and three quarts of MaxLife DexIII (I forget how much). Only thing I need to get still is the one part that was the cause of this whole clutch swap in the first place: the front tranny seal.

The front seal - I think input shaft seal is the technical name - has been leaking tranny fluid and flinging it all around inside the bellhousing, and thereby soaking the clutch. Now that the clutch has become so glazed from this crap, it freewheels if I give it much more than 50% throttle. What irritates the snot out of me is that I've had this exact same problem with that piece of crap Honda CRX that I drove around last year for a beater car, and I went through no less than THREE clutches, input shaft seals, AND rear main seals before I finally unloaded that turdpile onto some poor schmuck for $2000. I even swapped in a totally separate tranny into that thing, and it STILL wound up leaking again! I am soooooo not wanting to repeat history by having to re-do the clutch on this car, too, for the same reasons; I'd sooner revert back to an AOD than have to deal with changing the clutch out repeatedly because of a stupid $5 seal.

Now, I know that Chicago Rawhide, Fel-Pro, and some others make a "Sleeve n' Seal" kit for these things. Not sure exactly, though, if that's what I'm going to need here, or if I should chance it with a regular seal. The way I understand it, the seal kit has this sleeve that wraps around the shaft and helps it seal up better against the seal, since the shaft presumably has been worn down in that spot or something. Do I need to have the shaft milled down to use this, sort of like going .010" under on a rod or crank bearing, or do I just poke it on there as-is?

Also, being that this tranny is from an AOD to T-5 swap that was done about a year or so ago, what exactly would cause the front seal to go out this soon? Input shaft bearing going out? Driver abuse? (The previous owner was an 18-year-old twit that beat the snot out of the poor car daily.) High miles in general? Bad installation? Maybe never been changed out in the first place?

I'm hoping that changing the seal out, once I've already got the tranny dropped and dragged out, is just a matter of popping it off with a screwdriver or seal hook, and then carefully tapping the new one in.

Sorry for the lengthy post. Any advice is greatly appreciated.
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
2,468
86
99
Western Mass
Sep 23, 2005
#2
  • Sep 23, 2005
  • #2
You did not mention it in your list of parts and since this was an AOD...You did remember you had to install a Pilot Bearing in the crankshaft...Right???

Anyway, you remove the front bearing retainer and you will first find an oil seal you can replace. Don't lose the shim or bearing behind it! (unless of course you have your own dial indicator)
 

Darkwriter77

Resident Ranting Negative Nancy
5 Year Member
Jul 1, 2005
314
281
134
Apache Junction, AZ
Sep 24, 2005
#3
  • Sep 24, 2005
  • #3
The AOD - T-5 swap was done two owners ago (the owner before the kid I bought it from), so I can't say for sure what they did as far as the pilot bearing goes.

So, essentially I just pry out that retainer, and the seal just pops out? I don't have any diagrams of any sort in my Chilton on anything beyond changing out the entire transmission as one piece...
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
2,468
86
99
Western Mass
Sep 24, 2005
#4
  • Sep 24, 2005
  • #4
First go to this link and download free of charge the T5 service manual:

http://www.tremec.com/English/onlineorder/product.asp#Service Manuals

Next go get yourself a new pilot bearing such as Ford Racing's part number:

M-7600-A so your input shaft will have the proper support in the front.
 

Darkwriter77

Resident Ranting Negative Nancy
5 Year Member
Jul 1, 2005
314
281
134
Apache Junction, AZ
Sep 24, 2005
#5
  • Sep 24, 2005
  • #5
Excellent! The service manual will be a huge help. Many thanks!

As for the pilot bearing, is the one that comes with the KC clutch kit inadequate? I bought a separate one before I got the kit, since none of the online listings specified that it came with one, so I figured it'd be best to have it on hand just in case...

EDIT: Oh yeah, and I'm probably going to go ahead and do the rear main seal, too, while everything's off of there. Any major advantages to going with a Fel-Pro Teflon seal, versus the $10 rubber Fel-Pro seal?
 
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