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I destroyed transmission input seal trying to remove, now what?
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oscarsnapkin
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PostPosted: Tue Feb 23, 2021 8:29 am    Post subject: I destroyed transmission input seal trying to remove, now what? Reply with quote

Chalk it up to a case of ďwhile I have this apart I might as well change this...Ē So I have my transmission sitting on a bench because I wanted to clean up and grease the clutch operating shaft while I have the engine out. I figured, while Iím in here, I might as well change the trans. input shaft seal. I tapped the seal puller into the seal, and I had a nice tight grip on it. I had to pull as hard as I could and it didnít budge. All I did was tear the seal apart. I tried getting at it from a few different angles, but it is too difficult to access. I even put a ding in the transmission surface near the seal, but it is outside of where the seal sits, so it shouldnít be a problem as long as I smooth it out before Ďhopefullyí pressing in a new one. The puller below is similar to what I used. I tried tearing it out with needle nose vise grips and a small screwdriver, but I donít think Iím getting anywhere and Iím worried about causing more damage. Any thoughts? Is there a different type of puller that might work better? I was thinking about trying to use a needle bearing puller on a slide hammer, but I think the puller might be too big. I wish I would have left the stupid thing alone.
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Cusser
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PostPosted: Tue Feb 23, 2021 8:35 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Screw in three screws
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Use a Vise-Grip pliers, pull on the three screws, working from on screw to the other
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raydog
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PostPosted: Tue Feb 23, 2021 9:13 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

There's no turning back now. Do what Cusser said, or start picking away or cut at the rubber part of the seal and remove the bits to better see the metal housing. You can also use a sacrificial screwdriver. Heat up the tip and form a hook on the end of it . Get it in behind the seal, hook on to it and pull around the perimeter.
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MrGoodtunes
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PostPosted: Tue Feb 23, 2021 10:01 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

oscarsnapkin wrote:
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There's an awful lot of crunge all around the outside circumfrence of the old seal, and it's sort of welding (or at least sort of holding) seal in place. Use a knife to scrape that crap outa there, maybe even push the pointed end of your strong thin knife between seal and inside of cylindrical housing it's in. And don't be afraid to tap the seal a wee bit inward to help break it loose, so it's ready to move back in place and then out.
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Cusser
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PostPosted: Tue Feb 23, 2021 10:20 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Hook tool might help; such as Harbor Freight. I find these quite handy.
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Meiang Premium Member
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PostPosted: Tue Feb 23, 2021 10:21 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

You can use a camshaft/crankshaft seal puller attached to a drilled washer (this slides over the output shaft) and then use a bearing puller attached to the washer to extract the seal.
A good tip is to slide some acetate sheeting between the seal and the shaft to protect the shaft from any damage form the pullers.

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miller0358
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PostPosted: Tue Feb 23, 2021 4:24 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

I always had good luck with using just the screws
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infiniteLoop
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PostPosted: Tue Feb 23, 2021 4:40 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

What about using a soldering iron like a windshield remover tool? Go around the circumference at one spot so you can peel the rest out. Also , a heated end of a screwdriver would work if it was filed down not to damage the bore.
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goober
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PostPosted: Tue Feb 23, 2021 5:22 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

If all else fails it might be easier to remove the side cover, differential and unscrew the input shaft to get it out of the way.
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Zundfolge1432 Premium Member
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PostPosted: Tue Feb 23, 2021 6:05 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

goober wrote:
If all else fails it might be easier to remove the side cover, differential and unscrew the input shaft to get it out of the way.


Reminds me of a song I heard once about going through someoneís butthole to pull a molar.


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This is actually a cotter pin or key puller, itís strong. The object here is to insert this about a half inch and get behind the seal and pull. You might try at 6 oíclock then 12 oíclock. Sometimes after years they get stuck but this tool never fails.

Hereís a better pic
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So the name of the game here is get behind the seal rather than pick at the surface and having a hook type tool will aid you in doing this.
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Hereís the old seal you can see where the hook got a bite on it.

Use a German Elring seal and lube the seal and shaft when going back in. Even a little lube around the perimeter. Never try to seal a dry hole😀
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platatomi
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PostPosted: Tue Feb 23, 2021 8:50 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

The seal has an outer metal ring behind that rubber surface. What ended up working for me after it was torn up was hooking the spike from the seal puller up under and behind that ring at around the 12 o'clock position on the seal. It popped out the first pull.
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PostPosted: Wed Feb 24, 2021 12:48 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Excellent sign that one off😀
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AutoMechanic
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PostPosted: Wed Feb 24, 2021 2:15 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Either the screw or pick method would be best. I would get some other picks than the Harbor Freight ones though those are like butter they break very easily.
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oscarsnapkin
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PostPosted: Thu Feb 25, 2021 3:05 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Thanks for all the tips. Iím gonna have to put it on hold for a bit to I figure something out. This sucker is stuck. I tried a cotter pin puller as suggested, and all it wound up doing was bending the tool. Screw technique didnít work either, screws just pulled out when I really tugged on them. Iíve been cleaning all the rubber out with a small pick to expose more of the metal. I think my best bet is going to be something that attaches to a slide hammer. My pilot bearing puller is just a tiny bit too big and Iím worried itíll damage the shaft. The car is nowhere near running so I have plenty of time. Iíll update when I have success (or catastrophic failure) in case some other poor soul has the same problem down the road. This is what it did to my cotter pin puller.

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This air chisel attachment looks awesome, but I canít justify $92. Thanks again for the great info.



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Dark Earth
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PostPosted: Thu Feb 25, 2021 3:45 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

I think somebody glued that thing in with some really tough stuff. If it were me, I'd drill out the front face of the seal so you're only left with the part that's glued in. At that point, you'll be able to drive something skinny in between whats left of the seal and the trans case. Whats left of the seal will bend easier with the front material removed. Then it will be a matter of peeling it out. The only danger is damaging the trans case, so you have to be careful. Whoever glued this in left a ticking time bomb.
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PostPosted: Thu Feb 25, 2021 4:37 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

If you can force the seal outer ring all the way in and have room ,than you can crush it down with pliers and remove it.

Or maybe you could make your own mini bushing cutter.
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AutoMechanic
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PostPosted: Fri Feb 26, 2021 7:48 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Wow sorry those methods didnít work. Hopefully you can get it all the way out. Smile
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74 Thing
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PostPosted: Fri Feb 26, 2021 10:56 pm    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

Screw with a slide hammer?
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Blue69Baja
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PostPosted: Sat Feb 27, 2021 10:55 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

No matter what you do you have to be careful not to scratch the outer contact surface of the seal. If you scratch the aluminum seal contact surface.
The screws have always worked for me and my bud!
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oscarsnapkin
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PostPosted: Wed Mar 17, 2021 7:21 am    Post subject: Re: I destroyed transmission input seal trying to remove, now what? Reply with quote

raydog wrote:
There's no turning back now. Do what Cusser said, or start picking away or cut at the rubber part of the seal and remove the bits to better see the metal housing. You can also use a sacrificial screwdriver. Heat up the tip and form a hook on the end of it . Get it in behind the seal, hook on to it and pull around the perimeter.

I owe you a beer my friend. After spending tons of time trying to dissect this seal and trying to split it to get it out, I gave the screwdriver technique a try. I had it out in about 10 minutes. I bought a cheap Hatbor Freight flat head, heated it up and made a hook at the end. With the help of Vise Grips and a hammer it was out. I did bang up the bore a bit when I initially used the seal puller, but it seems to be near the outside edge, not where the seal sits, so I should be OK. Iím assuming I should put some Permatex or something similar on the new seal just to be safe. Any recommendations? Thanks a million.

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