i have been looking for a shift fork [ 1st and 2nd] for a ms 420 transmission for about 3 weeks now no luck, there was a change made in 1963, and the truck im working on is a 1957, a older gent told me yesterday that wear was a problem in the older ones [ it wont stay in 2nd] and theu just welded them back up to their original thickness, and about 90% of the time it fixed it, i can see where the original thickness was, have any of your tried this?
- Thread starter ericlb
- Start date
J.Wondergem
Well-known Member
- Location
- Rockford, Mi.
I welded one up on a stock car I raced back in the 50s. It held up.
Heat Houser
Member
Have welded the fork "buttons" on the 4-5 gear on my IH560 many years ago. Has stayed in gear ever since. It would pop out of 5th so biased it a little to that side.
wilson ind
Well-known Member
I read your post too quickly. Thought you were refuring to a pitchfork!!
If the fork is worn, it MAY be bent or mangled, as well and still not get the gears/collars where they need to be when welded up.
Last time I checked, there were all sorts of parts suppliers for the SM420 Muncie, and parts were not all that high-priced.
Look on the 'net or pick up a copy of one of the "4-Wheeler"-type mags that deal with older stuff and check out the ads.
Also, which fork(s) do you need? If I dug around a bit, I probably have some pretty nice used ones.
Should be all kinds of ads/parts suppliers there.
ONE source
Last time I checked, there were all sorts of parts suppliers for the SM420 Muncie, and parts were not all that high-priced.
Look on the 'net or pick up a copy of one of the "4-Wheeler"-type mags that deal with older stuff and check out the ads.
Also, which fork(s) do you need? If I dug around a bit, I probably have some pretty nice used ones.
Should be all kinds of ads/parts suppliers there.
ONE source
bent is what is worrying me, the fork , on the 2nd gear side is worn maybe 1/8th inch and im not sure thats enough to make it not hold in 2nd gear, you can hold it in there, but you really have to hold it hard, i called novak 2 weeks ago and they have the 63 up forks, but are out of the 62 back ones which are different, i need the 1-2 fork, my feeling is that somebody back in the day slam shifted the truck from first to second probably on a grade, with a load of cattle in the truck, and bent the fork , im going to check one more place i found, today i have found 2 trannys in the county but 1 is newer and doesnt have the emergency brake provisions on the case so i cant just swap that one in the truck, and the other is in a truck that looks like it had a very hard life im thinking the forks in that tranny will be as bad as the one i have
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