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Tips to remove rear transmission seal
#1
Hello,

Tonight I was trying to remove the rear transmission seal on my dads 71 coupe c4 transmission. I spent a long time trying to get it to come off but It wouldn't budge.
Does anybody have any tips or tricks to get the seal off? The transmission is still in the car.

Thanks For Your Help!!



SUPER - MUSTANG


My Garage:

1978 Ford F-250 - 460-4v
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#2
Not sure exactly what the problem is but here is a video of how to replace it. Part shops will usually lend you the tool to remove the seal with. At 3:30 into the video it shows how they removed it. Wasn't a C4 but they are all removed the same way. Hope this helps.
http://www.youtube.com/watch?v=O8zYcBpP9xU

-john
(jbojo)
351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

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#3
Super-Mustang;184281 Wrote:Hello,

Tonight I was trying to remove the rear transmission seal on my dads 71 coupe c4 transmission. I spent a long time trying to get it to come off but It wouldn't budge.
Does anybody have any tips or tricks to get the seal off? The transmission is still in the car.

Thanks For Your Help!!

Good question, that's on my "to do" list on my C4.



Mike AKA Ole Pony & Rare Pony

Our current Mustang garage/driveway
1973 Mustang Convert - Bought in 1974 - Still have it!
2004 Mach 1 Oxford White Auto, Bought Sept 06


[Image: 20180127_082009.jpg]

upload a photo on internet




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#4
(06-15-2014, 09:45 PM)jbojo Wrote: Not sure exactly what the problem is but here is a video of how to replace it. Part shops will usually lend you the tool to remove the seal with. At 3:30 into the video it shows how they removed it. Wasn't a C4 but they are all removed the same way. Hope this helps.
http://www.youtube.com/watch?v=O8zYcBpP9xU

The problem is that the seal will not come out no matter how hard I tried. I'm going to see about getting one of those tools mentioned in the video. Then maybe the seal will come out.



SUPER - MUSTANG


My Garage:

1978 Ford F-250 - 460-4v
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#5
I have used a straight screwdiver and hammer many times. Just be VERY careful not to gouge the transmission housing where the seal sits. If its really stuck Just keep punching holes through it with the screw driver and it will eventually come out. Might need some needle nose pliers or something to pick it out. it might come out in a few pieces but it will come out. A little barbaric but it works. No need for a fancy tool LOL! If you do accidently gouge the case a little, put some silicone on the new outer edge of the seal when you tap it in. Make sure you start it straight and use a socket that matches the diameter of the seal to tap it in.

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
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#6
A small slide hammer with a hook on it, move around the seal until it comes out.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#7
Many years ago I used an awl to punch a hole in the seal, then inserted a sheet metal screw, when it bottoms out it pushes the seal up the thread and out of the transmission. I now have the tool.
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