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Old 02-05-2022, 12:05 PM   #1
1968k20
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Please ID Trans

Please ID for me. I was able to pull some brackets off of it.
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Old 02-10-2022, 11:25 AM   #2
MJN
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Re: Please ID Trans

Its not a SM420- it looks to be a 'crash box' or sliding gear or simply the GM four speed transmission, the unsynchronized trans used before the SM420 came out. There should be a stamped code on the case at the rear edge of the top cover.
Is the case casting number 590474?
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Old 02-12-2022, 04:36 AM   #3
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Re: Please ID Trans

Ford F series big truck + 1-1/2 ton or larger transmisison with the hogshead for a flathead.

This is the Hogshead that is on my Ford Flathead.


I've got two of those 4 speeds out of pickups, One that I bought and one that is about in as bad of shape as that one that came with a 52 F-1 chassis that I stripped some pieces off and sold but kept the trans for the hogshead.

That hogshead that bolts to the front of the transmission is worth from 50 to over 100 to flathead guys who use it with an aluminum adapter plate to bolt an S-10 T-5 to a flathead.
The adapter plate, this is one that I bought from Dwight Bond bolts to the hogshead and the transmission bolts to it.


I thought I had a photo of one of those 4 speeds but will have to take some in the morning.
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Old 02-12-2022, 04:40 AM   #4
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Re: Please ID Trans

1952 FORD 4-SPEED TRANSMISSION 59T-7006,WG 004, T8D-1A,with PTO,and BRAKE 48-52 | eBay No longer listed.
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Founding member of the too many projects, too little time and money club.

My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
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