LS Talk All things based on the GM LS platform engine

          
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  #21  
Old 03-15-2026, 10:25 AM
mgarblik mgarblik is offline
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The mixture of old school transmission and new tech engine is interesting and not very common. The need for an overdrive is pretty minimal with a LS3 engine. Gas mileage will suffer a little but those engines can certainly run at 3000-3500 RPM all day. How do you like the hydraulic TO bearing? That would certainly simplify things as far as installation. It's the brute torque of a Pontiac V8 that really tears up light weight aluminum case transmissions like a Muncie. That problem is eliminated with an LS engine. I love the simplicity of a Muncie/Borg Warner trans. So easy to overhaul if there is ever an issue. Although I would love to have a TKX in my Catalina for example, the 4K+ cost has keep me in the Muncie world. Congratulation on a really neat installation.

  #22  
Old 03-15-2026, 11:25 AM
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Originally Posted by mgarblik View Post
The mixture of old school transmission and new tech engine is interesting and not very common. The need for an overdrive is pretty minimal with a LS3 engine. Gas mileage will suffer a little but those engines can certainly run at 3000-3500 RPM all day. How do you like the hydraulic TO bearing? That would certainly simplify things as far as installation. It's the brute torque of a Pontiac V8 that really tears up light weight aluminum case transmissions like a Muncie. That problem is eliminated with an LS engine. I love the simplicity of a Muncie/Borg Warner trans. So easy to overhaul if there is ever an issue. Although I would love to have a TKX in my Catalina for example, the 4K+ cost has keep me in the Muncie world. Congratulation on a really neat installation.
I have 3.23 gears. So, need for O.D. is questionable. I couldn't justify the extra cost. Especially when I had a known/good Muncie sitting on the shelf. I haven't actually used the throwout bearing yet. All parts seem top notch. Installing the master cylinder correctly was a much bigger job than anticipated. I have it on the money. This Muncie stood up to many years behind a low 12 second 455 combo. I'm sure it's up to task here. I was also encouraged by knowing that a TKX will bolt right up to this bell housing. Would just need a clutch disc change. Not sure about throwout bearing. Might pull the O.D. trigger down the road (pun intended .

  #23  
Old 03-15-2026, 08:24 PM
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Got the bell housing lined out. Got it on the first try! Couldn't believe it. The face runout was only .003". Got the concentricity within .0015".



I read many time that you need an extended pilot bearing with an LS and Muncie. Not on this one for sure. I think it would hit an extended.



I had bought one just in case. Oh well. On the shelf it goes.



Console repaint turned out good. I didn't know, until this project, that I don't have a correct '64 console. Oh well.

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  #24  
Old 03-16-2026, 09:26 AM
gtospieg gtospieg is offline
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Nice job...your transmission will thank you with smooth shifts and a longer life.

  #25  
Old 03-16-2026, 09:33 AM
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Originally Posted by gtospieg View Post
Nice job...your transmission will thank you with smooth shifts and a longer life.
Thanks!

This is the first time I've delved into assessing a bell housing. In my younger days, it wouldn't have even occurred to me. We just threw stuff together. Lol! I was pleasantly surprised that I was able to swap the dowels out in the car. Also drill set screw holes to retain them. Thank God for my Makita right angle drill! Love that thing!!! I found a great video about removing them with a C-clamp and two sockets. Great idea. Not enough room in the vehicle. Had to use a socket and a mini sledge to drive them out. Didn't even have to remove the headers.

  #26  
Old 03-16-2026, 02:48 PM
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unruhjonny unruhjonny is online now
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the sharpy will fade pretty darn quick;
you can get a paint pen from the likes of Hobby Lobby - I would suggesting using a paint pen.

I also don't mind the yellowed white knobs - it's patina for vintage aftermarket parts.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #27  
Old 03-16-2026, 02:54 PM
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Originally Posted by unruhjonny View Post
the sharpy will fade pretty darn quick;
you can get a paint pen from the likes of Hobby Lobby - I would suggesting using a paint pen.

I also don't mind the yellowed white knobs - it's patina for vintage aftermarket parts.
No long term need for the Sharpie marks. They are for setup reference only. I've already removed them with lacquer thinner and a rag.

I'm a little snobby on the shift knob appearance. lol

  #28  
Old 03-16-2026, 03:03 PM
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There's a large mounting boss on the driver's side of the bell housing. I think it's for mounting a Chevy pivot ball. Maybe Tri-5's? It makes it a real B!@#* to get on the bolt above. So, I removed most of the superfluous appendage. I coulda made it look a lot better with a 2-flute end mill. I just wanted to hog it off quickly. Not like it's going to be seen.



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  #29  
Old 03-16-2026, 06:38 PM
gtospieg gtospieg is offline
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Back in the day and even now bellhousing alignment isn't all that important for the Muncie. The reason it's so important now is because the newer 5 speed transmissions have a different type of front bearing that is far more sensitive. than the old style, to proper alignment. When I installed my 5 speed the manufacturer wanted .003 or better or there would be no warranty. It looks like you have a new bellhousing, that had to help with the tolerances for parallel.

  #30  
Old 03-17-2026, 04:18 PM
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Quote:
Originally Posted by gtospieg View Post
Back in the day and even now bellhousing alignment isn't all that important for the Muncie. The reason it's so important now is because the newer 5 speed transmissions have a different type of front bearing that is far more sensitive. than the old style, to proper alignment. When I installed my 5 speed the manufacturer wanted .003 or better or there would be no warranty. It looks like you have a new bellhousing, that had to help with the tolerances for parallel.
Interesting. I don't really know. Just know that it can't be aligned too well. Ha!

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