70 muncie removal help

[Dennis D.]

Snowed in in the northeast. Perfect time for that clutch R&R.

Everythings out, but the 4 trans to bellh. bolts. I didn't remove the exhaust because I had it welded at the trans mount joint. Will the trans come out with the exhaust still there? Almost brand new and trying to avoid cutting it.

If I have to, where's the best place to cut and hopefully reuse? Thought at the long pipe just rearward where it comes through the frame crossmember.

Or,(1)cut it out and spring for another.

(2) Since I'm supporting the engine with my hoist, just pull the

engine/ trans together and add to the winter "while I'm at its"

(still beats shovelling snow)

[Joe L.]

Re: 70 muncie removal help

Dennis------

I don't think that it's possible to remove the transmission with the exhaust installed in the normal position. The rear exhaust has to be removed or disconnected and "pulled back". I can't suggest where to cut it.

I do not recommend the welding of the forward and rear exhaust pipes at the cross-member joint. It was never done this way in PRODUCTION and for very good reason. You found out the reason. It's true that a welded joint is better and safer than a clamped joint. However, this joint is usually never a leakage problem if it's properly clamped. It's ok to weld the rear joint (between rear pipe and muffler). This joint was originally welded, although the PRODUCTION configuration was different than the SERVICE configuration.

[Joe L.]

Re: 70 muncie removal help

Dennis------

I don't think that it's possible to remove the transmission with the exhaust installed in the normal position. The rear exhaust has to be removed or disconnected and "pulled back". I can't suggest where to cut it.

I do not recommend the welding of the forward and rear exhaust pipes at the cross-member joint. It was never done this way in PRODUCTION and for very good reason. You found out the reason. It's true that a welded joint is better and safer than a clamped joint. However, this joint is usually never a leakage problem if it's properly clamped. It's ok to weld the rear joint (between rear pipe and muffler). This joint was originally welded, although the PRODUCTION configuration was different than the SERVICE configuration.

[Dennis D.]

Re: 70 muncie (next problem)

Thanks Joe. BTW did manage to get the trans out with just loosening the exhaust. It was more of a struggle to get the bellhousing through the space between the 2 front pipes.

The next problem: I had a chatter, and highway vibration, which is why I started this project. When I got everything out the disc, pressure plate, throwout, were OK. I was surprised when the pilot bushing came falling out! The trans input seems ok, Is it damaging to anything when the bushing spins?

[Dennis D.]

Re: 70 muncie (next problem)

Thanks Joe. BTW did manage to get the trans out with just loosening the exhaust. It was more of a struggle to get the bellhousing through the space between the 2 front pipes.

The next problem: I had a chatter, and highway vibration, which is why I started this project. When I got everything out the disc, pressure plate, throwout, were OK. I was surprised when the pilot bushing came falling out! The trans input seems ok, Is it damaging to anything when the bushing spins?

[Mike M.]

Re: 70 muncie (next problem)

i'd disassemble the Muncie and check the needle bearings inserted in the input shaft(main shaft snout rides on these bearings). would also check the input shaft bearing. both of these areas would be stressed when pilot bushing isn't "piloting".ROOT FOR PENNSYLVANIA'S FINEST -----steelers. mike

[Mike M.]

Re: 70 muncie (next problem)

i'd disassemble the Muncie and check the needle bearings inserted in the input shaft(main shaft snout rides on these bearings). would also check the input shaft bearing. both of these areas would be stressed when pilot bushing isn't "piloting".ROOT FOR PENNSYLVANIA'S FINEST -----steelers. mike

[Dennis D.]

Re: 70 muncie (next problem)

thanks mike

Since the pilot bushing was loose enough to fall out, I'm asuming the bronze bushing wore and not the bored end of the L-46 forged crank.

Any speculation on the cause of the failed bushing?

[Dennis D.]

Re: 70 muncie (next problem)

thanks mike

Since the pilot bushing was loose enough to fall out, I'm asuming the bronze bushing wore and not the bored end of the L-46 forged crank.

Any speculation on the cause of the failed bushing?

[Mike M.]

Re: 70 muncie (next problem)

probably due to an inexperienced installer by the name of big bubba. doubt the crank is damaged.mike

[Mike M.]

Re: 70 muncie (next problem)

probably due to an inexperienced installer by the name of big bubba. doubt the crank is damaged.mike