Please ID Trans - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1968k20** · 02-05-2022, 12:05 PM

Please ID for me. I was able to pull some brackets off of it.

**MJN** · 02-10-2022, 11:25 AM

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?

**mr48chev** · 02-12-2022, 04:36 AM

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.

**mr48chev** · 02-12-2022, 04:40 AM

1952 FORD 4-SPEED TRANSMISSION 59T-7006,WG 004, T8D-1A,with PTO,and BRAKE 48-52 | eBay No longer listed.

02-05-2022, 12:05 PM	#1
1968k20 Senior Member Join Date: Dec 2009 Location: Chester,California Posts: 5,632	Please ID Trans Please ID for me. I was able to pull some brackets off of it. Attached Images __________________ 1977 Chevrolet K10 SWB Project 350/4spd/np205 1977 Chevrolet K20 LWB 350/350/203 1991 4Runner 22RE 5 SPD Yanmar Tractor 3 Cyl Diesel

02-10-2022, 11:25 AM	#2
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	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? __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

02-12-2022, 04:36 AM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,715	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. __________________ 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.

02-12-2022, 04:40 AM	#4
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,715	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. Attached Images __________________ 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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