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Posted By: 47chevySC Play in SM420 Shifter 1947 3100 - Thu Jun 11 2020 12:24 PM
Hello. I looked back at some old posts about this issue and see where some play in these shifters is normal but I am not sure if mine is above normal. The shifter moves about 5-6 inches left to right in neutral and 3-3.5 inches when in any of the gears. The pins that hold the shifter cap has play in them. I have nothing to compare them to so not sure if that's normal of it they could be an issue. Any help on this would be appreciated.
Posted By: sstock Re: Play in SM420 Shifter 1947 3100 - Thu Jun 11 2020 01:54 PM
If the shifter lugs are worn then yes it is going to seem really loose.
Worn lugs are really common on these old transmissions
Posted By: cmayna Re: Play in SM420 Shifter 1947 3100 - Fri Jun 12 2020 01:11 AM
I just went out and did a quick measure of my SM420 in the '50 and on an average I got 2" slop when in gear and 4" when in neutral. No idea if this is correct or not.
Posted By: Forty9 Re: Play in SM420 Shifter 1947 3100 - Fri Jun 12 2020 02:53 AM
49 3100. I measure 3" in neutral and approx 3/4" in other gears. Seem to recall replacincing the pins many years ago but don't recall where I got them from.
Posted By: Forty9 Re: Play in SM420 Shifter 1947 3100 - Fri Jun 12 2020 03:01 AM
Google SM420 shift tower pins and you'll find many opinions and possible fixes. Good luck
Posted By: 47chevySC Re: Play in SM420 Shifter 1947 3100 - Fri Jun 12 2020 11:25 AM
Thanks for the info. It does look like the tower pins need to be replaced but do not see the pins listed anywhere. Does no one not make these? Is the spring pin the only option?
Posted By: sstock Re: Play in SM420 Shifter 1947 3100 - Fri Jun 12 2020 12:17 PM
I have a couple extra lugs/pins I could send you, also have a really nice shifter top depending on whether you have the e brake on the trans.
I have actually had better luck knocking out the loose lugs and drilling out the tower to accept a slightly larger hardened spring pin boy that really tightened up things.
Steve
Posted By: 47chevySC Re: Play in SM420 Shifter 1947 3100 - Fri Jun 12 2020 01:35 PM
Hi Steve. Thanks for the info. Would those pins usually be available at the hardware store? Do by chance know what size they are?
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