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#73503 02/18/2007 7:03 PM
Joined: Nov 2006
Posts: 108
H
Wrench Fetcher
Wrench Fetcher
H Offline
Joined: Nov 2006
Posts: 108
My Muncie 420 leaks pretty bad...over spring break I want to overall it... The transmission shop wanted me to order the gasket set, and rear bearing (tail shaft)

What other parts do I need to buy?


1951 3100
http://community.webshots.com/user/HolcombRacing11

"Every child is an artist. The problem is how to remain an artist once he grows up."
Pablo Picasso
#73504 02/18/2007 7:07 PM
Joined: Feb 2006
Posts: 1,867
R
Shop Shark
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Posts: 1,867
You might need 2 new synchros. One of the synchros is built into a gear and that one is typically not real worn unless its had some serious grunt done to it. I was always taught if your gonna replace one bearing replace them all. You can get the complete set, (all bearings, needle bearings, gaskets, including 2 synchros, etc...) for less then 200$.

Its kinda funny cause I just tore one down last night!

Jeff


My 1953 Chevrolet
1947.1 Gallery
1972 C-10 1/2 Ton & 1972 C-30 1 Ton
#73505 02/18/2007 7:11 PM
Joined: Jun 2004
Posts: 8,597
W
Riding in the Passing Lane
Riding in the Passing Lane
W Offline
Joined: Jun 2004
Posts: 8,597
You can buy a complete o-haul kit that includes brgs, seals & snap rings etc. I f it is working ok & just leaks you can put seals & gaskets in it yourself. You certainly want to put the front drive brg. in if you o-haul it. That one usually goes first. If it makes more noise than usual in the lower gears & is quiet in high it is a good indication the front drive gear bearing is bad.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum
#73506 02/18/2007 8:05 PM
Joined: Nov 2006
Posts: 108
H
Wrench Fetcher
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Ya it doesn't make any noise...just leaks...the transmission shop wanted me to get all the parts needed to do the work...Just wanted to be prepared when he takes it...that way I have all parts needed in case


1951 3100
http://community.webshots.com/user/HolcombRacing11

"Every child is an artist. The problem is how to remain an artist once he grows up."
Pablo Picasso
#73507 02/18/2007 8:07 PM
Joined: Nov 2006
Posts: 108
H
Wrench Fetcher
Wrench Fetcher
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Where do guys suggest I look for parts? What should I buy exactly? I'm at the end of my budget....


1951 3100
http://community.webshots.com/user/HolcombRacing11

"Every child is an artist. The problem is how to remain an artist once he grows up."
Pablo Picasso
#73508 02/18/2007 9:52 PM
Joined: Feb 2006
Posts: 1,867
R
Shop Shark
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Heres a few places from the links section on this site.

http://www.novak-adapt.com/catalog/sm420_parts.htm

http://www.hermtheoverdriveguy.com/id3.htm

If you feel up to it, I dont think its a real complicated overhaul. I pulled mine apart in a few hours time and the only tools I needed were a handful of sockets, hammer, gear puller, punches, snap ring pliers and a punch. Youll feel pretty good about doing it yourself if you feel up to it!

Heres a helpful write up listed in the parts section and if you have a service manual that pretty much walks through most of the stuff to tear it apart.

http://members.cox.net/cglabe1/SM420/sm420.html

Jeff


My 1953 Chevrolet
1947.1 Gallery
1972 C-10 1/2 Ton & 1972 C-30 1 Ton
#73509 02/18/2007 11:02 PM
Joined: Nov 2006
Posts: 108
H
Wrench Fetcher
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H Offline
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Posts: 108
Thankyou


1951 3100
http://community.webshots.com/user/HolcombRacing11

"Every child is an artist. The problem is how to remain an artist once he grows up."
Pablo Picasso

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