4 speed muncie ext . bushing

[Dennis D.]

Re: 4 speed muncie ext . bushing

Chuck

Are you saying I need to remove these things to change out the bushing, or is that the additional work to pull the trans. I would try to do it in the car, need a little help with the how-to.

I figure when the cars comes apart in the winter, the trans is going for a rebuild, and I can use it for the rest of the fall season.

[Chuck R.]

Re: 4 speed muncie ext . bushing

That's to pull the tranny Dennis.

I agree with my esteemed fellow contributors that the BEST way to do this repair is to pull the tranny because of the finness work involved.

Your going to have to punch out the reverse fork slector shaft pin to pull it back far enough to pull the housing free but then other variables will come into play with such things like thrust washers and such.

Not a good thing to be dealing with while your on your back or even if it's on a lift.

Not to mention the 80 weight that never seems to stop oozing and dripping out.

I have a great re-build tape that I got from Paul Cangialosi of Medatronics Inc. with my tranny re-build kit that I'll be happy to loan you if you like.

He go's through the re-build process using simple hand tools and points out just what you would need to be aware of.

I know it's frustrating when such a seemingly simple issue takes a tear down to correct it. The risk is damaging the housing if you try to "Rambo" it.

I guess it's your call how you want to proceed.

Let me know if you want to borrow the tape,

Chuck

[Dennis D.]

Re: 4 speed muncie ext . bushing

Thanks Chuck

Pulled the trans today. Your right, it's not that hard to get out. Done it too often. I called my trans guy to walk me through the extension removal. Everthing looks good in there. Just going to change the bushing.

In the winter it will come out again, and I may try the rebuild. A few people have told me about that tape. I'll invest in one if I decide to do it myself. Thanks for your offer to lone it to me.

If all else fails, its off to Ed Hartnett for a rebuild.

[Gordon Peterson #4961]

Hey Guys!! Mike Stapp Was Right!!

Snap-on DOES INDEED make a tool that pops the extension bushing out of a Muncie. An old mechanic turned me onto this tool last year. It took me less than ten minutes to pop the old bushing out and tap the new bushing in (using another Snap-on tool) while under the car with the tranny in place. The only thing un-done was the driveshaft. Heck, it took me longer to replace the darned seal that fought me for nearly 20 minutes.

The Snap-on tool reaches in through the bushing and locks onto the inner edge in six places. Then it draws the bushing out by screwing against the end of the mainshaft. Slick as sh...!

Extractor tool - S 8672D
Insertion tool - S 8673C1

Worth their weight in gold. I didn't have to pull that darned tranny again!

Pete

[Dick W.]

Re: Hey Guys!! Mike Stapp Was Right!!

The only think that I can find in the Snap On catalog is the ATS 2200. Is this the same item??

[Tom P.]

Re: Hey Guys!! Mike Stapp Was Right!!

OK guys, I got so tired of reading all of the above and I went out in the shop and got my extension housing bushing removal/installation tool. It is an ATEC Trans-Tool, T-0160-A. The phone number on the box is 1-800-531-5978. As mentioned, it works by reaching in between the bushing and tail shaft, griping the bushing from inside and pulling it out the rear by screwing the tool up against the tailshaft.
Now, here is an old trick that my uncle taught me (he was a factory trained Chev mechanic) MANY years ago. Place a piece of pipe (may have to machine it down so that it is a tiny bit smaller than the OD of the bushing) against the old bushing and drive it INTO the tranny. Then drive in a new bushing and install a new seal. Yes, that means the old bushing is turning loose on the tail shaft inside the extension housing. Won't hurt a thing in there.

[Joe L.]

Re: Hey Guys!! Mike Stapp Was Right!!

Tom, Mike and Gordon-----

As I checked a Muncie extension housing, I note that there is a longitudinal "keyway" in the bushing orifice. I had never really noticed this previously. I suppose that it would be possible to insert some sort of tool through this "keyway" and pull the bushing out. It might even be that this is what the "keyway" is intended for. However, GM never specified a field R&R procedure for the extension housing bushing with the transmission installed in the car and no GM service tools were ever available as far as I can tell.

It would definitely be possible to drive the bushing into the transmission and then install a new one in the "vacated" orifice. Personally, I'd be very reluctant to do it this way. It's sort of a "bubba" type thing. I don't think that the displaced bushing would necessarily cause any mechanical problem, but I would be concerned that it might cause a noise problem.

[Gordon Peterson #4961]

Snap-on Tool Discontinued!? and more...

Oh no!! I'm GLAD I bought mine when I did (this time last year). Because it appears that they may no longer sell it! What a shame.

Joe, the tool has six fingers that fit between the ID of the bushing and the tranny's tailshaft. Remember that this bushing does not touch the shaft. It contacts the OD of the yoke that slides onto the shaft - so there is >considerable

[Gordon Peterson #4961]

(post correction - ignore previous)

(lost half my posting - I'll try it again and preview it this time)

Oh no!! I'm GLAD I bought mine when I did (this time last year). Because it appears that they may no longer sell it! What a shame.

Joe, the tool has six fingers that fit between the ID of the bushing and the tranny's tailshaft. Remember that this bushing does not touch the shaft. It contacts the OD of the yoke that slides onto the shaft - so there is considerable clearance here (the thickness of the yoke), more than enough to insert this tool along the shaft and through the ID of the bushing.

The tool also features a "lock" so that once the tool is engaged on the bushing, it won't dis-engage until you unlock it. Nicely designed tool.

Pete

[Chuck R.]

Re: 4 speed muncie ext . bushing

10-4 Good Buddy

Take care

Chuck

[Gordon Peterson #4961]

Root of Misunderstanding

I was unclear earlier. When I said that the only thing undone was the driveshaft, in my feeble brain, that meant that the yoke was OUT as well. Hence the clearance to insert the tool.

[Chuck R.]

Re: Sure must be nice

To have those "use once in ten years" tools on the shelf ready for the next tail stock bushing job.

I'm just jealous

Chuck

[Gordon Peterson #4961]

Picture of Tools

I can't post a picture today, I guess. Okay, follow this link:


Extractor tool on the left, insertion tool on the right. The knurled knob controls a sliding lock (currently engaged). It's a sliding tube behind the fingers that keeps them from retracting after they have grabbed the bushing. On the butt end is a large bolt that turns against the end of the shaft to withdraw the bushing.

Anyone in central MA that needs a Muncie (or T10??) bushing changed, drop me a line.

Pete

[Gordon Peterson #4961]

AHA - found my problem *NM*

[Dennis D.]

Re: Isn't ebay great

I already took the trans out. But I did find ths tool on ebay. I'll only use it once at best, so I'll pass.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=4573244995&sspagename=STRK%3AMEWA%3AIT