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Output shaft seal solution 4F27E

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4f27e focus
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1.4K views 6 replies 5 participants last post by  poyofocus  
#1 ·
Some of you may know how frustrating it is to install the output shaft seal/CV axle seal on the 4F27E Automatic transmission if you don't have the right tool. You may also have ruined a seal or two like I did using the wrong tool. The problem is that the right tool (OTC 307-572) is scarce and excessively priced if you find it. So I designed one that works just as good and 3d printable. You use it just like the OTC tool but you hammer the flat back instead of using a driver handle.
Let me know if you have a 3d printer and would like the file or if you'd like one printed. I can give you a deal you can't refuse 😜.
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#2 ·
Just finished the Driver's side. The seal driver kit I bought for this didn't work, save your money, IMHO. The PVC connector that fit the rim worked about the same. One side of the seal would always get deeper and I couldn't get it back straight.
A post here suggested using the old inner tripod to push it in. That worked pretty good, still, one side got a little deeper. I used a large tipped screwdriver to tap it straight and finish the seating. I always think of Primitive Pete when I go beating with a screwdriver. It's in and not leaking.
The screwdriver on my prior methods may have worked, too.
The old inner tripod would have worked better had the old inner tripod not been tossed. I used the new transaxle. Be careful to not let the transaxle get extended. If the axle comes out of the inner tripod, the boot has to come off to get it back together. The 3 rollers have to be pushed out, not in, for it to go back into the tripod. The shaft for the rollers is long enough for the rollers to move away from the axle. Getting it back together was fairly easy.

How do you get the seal out? I tore 2 of them completely apart to get them out (no pullers handy). The 2nd was a new seal that didn't make it through the prior installation methods.

Good job on your tool, it sure looks good.

Adios,
Big Tex,
 
#3 ·
Just finished the Driver's side. The seal driver kit I bought for this didn't work, save your money, IMHO. The PVC connector that fit the rim worked about the same. One side of the seal would always get deeper and I couldn't get it back straight.
A post here suggested using the old inner tripod to push it in. That worked pretty good, still, one side got a little deeper. I used a large tipped screwdriver to tap it straight and finish the seating. I always think of Primitive Pete when I go beating with a screwdriver. It's in and not leaking.
The screwdriver on my prior methods may have worked, too.
The old inner tripod would have worked better had the old inner tripod not been tossed. I used the new transaxle. Be careful to not let the transaxle get extended. If the axle comes out of the inner tripod, the boot has to come off to get it back together. The 3 rollers have to be pushed out, not in, for it to go back into the tripod. The shaft for the rollers is long enough for the rollers to move away from the axle. Getting it back together was fairly easy.

How do you get the seal out? I tore 2 of them completely apart to get them out (no pullers handy). The 2nd was a new seal that didn't make it through the prior installation methods.

Good job on your tool, it sure looks good.

Adios,
Big Tex,
The trick when using the tool is to line up the seal by spinning a little bit on the transmission then give it a couple of big whacks. If you are soft with the bonks, it will not go in straight.

As far as taking it out, I haven't figured out a way to do it without tearing it up.