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Is it leaking at all out the front? If you wanted to make sure it doesn't later on, now is the time to do it. You can have or do it your self if you have access to a lathe, turn a small insert ream the pin hole that elongates in the from of the case, press it in sealed and that quite normal leak is gone for good. Any Muncie builder should be able to do that for you. Since that far in go ahead and refresh it with new consumables.
I just recently (about 4 weeks ago) rebuilt my M21 Muncie using Paul's parts.
Had a leak from the front and back. I used Paul's book and followed all his suggestions on his youtube channel as well. Very helpful and made the whole process really painless.
I ended up putting on his new Midplate (has a bolt to lock the countershaft to the midplate). I also went and used his zero rock sliders and hubs. All new bearings and bushings. I noticed a huge difference in shifter feel. Its more rigid and sharp. I now have no leaks at all (including the front). Make sure you use permatex anaerobic gasket maker (a must if you want your gaskets to actually stop leaks).
Heres a pic of the shifter rods installed in the lower holes. The rods were painted before adjusting from the upper hole to the lower close ratio holes
Last edited by Rescue Rogers; Feb 28, 2018 at 07:13 PM.
Thanks to 2mnvets and the theandies and Crusader and Indian,
I think I will tackle this rebuild myself so I have just ordered Pauls book. Once I get everything apart, I will likely have a few more questions but first I need to pick up a press and more importantly try to find room for it in my limited space shop.
As for the shifter, that I will pull apart as I am having a hard time understanding the parts being referred to but like most things it will make sense when it comes apart and I have the rebuild kit in hand.
There is another place to get parts and info and that is a company called Auto Gear. Paul gets a lot of his parts from this place.
I believe they are all related. Auto Gear, with Paul's input, redesigned a number of the components and eliminated a lot of the Muncie shortfalls. They make every part so you can assemble a whole transmission. That transmission is called a Syracuse transmission. I believe Paul may modify some of these parts to further improve performance. The one that comes to mind is he dimensionally matches the sliders so to improve shift capabilities.
I assembled a Syracuse from the parts and it is a really nice piece. Haven't finished the car yet so I can't tell you how it works.
One of the shorfalls of the Muncie is the first gear bushing. Depending upon how you drive and what you use the car for, the transmission will seize on this bushing. This happened to me. The fix is a roller bearing instead of the bushing. There is also a redesigned bushing, if you don't push the car too hard. I have all the special parts from Auto Gear: Cage bearings instead of needle bearings, lightened main shaft, quick shift sliders, etc.The transmission works great.
I use my own components for for rebuild kits. Just for the record I manufacture a great deal of my own parts. I am also involved in the reproduction of ST10 parts
There are a few great videos on 5speeds.com. He shows you how to rebuild a Muncie with shop tools. It easier if you have a press but these videos are good. I have rebuilt a stock shifter a couple times. Yes, you will get less slop but it still ain't great. I finally had to go to a Hurst.
There are a bunch of free videos on my youtube channel
