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tranny ID #1294268
Thu Jan 10 2019 05:25 PM
Thu Jan 10 2019 05:25 PM
D
doobspanel  Offline OP
Wrench Fetcher
Joined: Jul 2018
Posts: 66
tucson az usa
so i have what i'm pretty sure is a sm 420. there are a bunch of numbers cast into it. on the cover, GM6, 591588, on the side is j 1860 which i think is date code for oct 18 1960?
then under that, the number 3 and under that, 3761930. there is also the letter T stamped in the side. in addition, there is a spicer box coming out of what i think is a PTO on the side.

any help would be great.
thanks

Re: tranny ID [Re: doobspanel] #1294270
Thu Jan 10 2019 05:45 PM
Thu Jan 10 2019 05:45 PM
tclederman  Offline
Boltergeist
Joined: Sep 2001
Posts: 27,501
Jarvisburg, NC


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 50 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: tranny ID [Re: doobspanel] #1294282
Thu Jan 10 2019 07:10 PM
Thu Jan 10 2019 07:10 PM
D
doobspanel  Offline OP
Wrench Fetcher
Joined: Jul 2018
Posts: 66
tucson az usa
yes, that did. so why is there the spicer box bolted to the drivers side of the tranny? i'm guessing that is a pto? would it have been used to run something off the truck? can i just remove it and find a cover for it?

thanks

Re: tranny ID [Re: doobspanel] #1294286
Thu Jan 10 2019 07:25 PM
Thu Jan 10 2019 07:25 PM
K
klhansen  Offline
Shop Shark
Joined: May 2015
Posts: 1,088
Eagle River, Alaska
You can remove that PTO and get a cover for the opening. The bolt pattern has been the same for ages. I think I've seen new covers for $10, but you could browse the junkyard and probably find one off a dead tranny for next to nothing.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck.
Re: tranny ID [Re: doobspanel] #1294509
Sat Jan 12 2019 05:51 AM
Sat Jan 12 2019 05:51 AM
M
Mike B  Offline
Shop Shark
Joined: Mar 2004
Posts: 3,553
Hughesville, MD
Or just make one from a piece of flat stock metal.

Mike B smile

Re: tranny ID [Re: doobspanel] #1294645
Sun Jan 13 2019 01:28 AM
Sun Jan 13 2019 01:28 AM
E
EdPruss  Offline
Shop Shark
Joined: Jun 2011
Posts: 2,580
Longmont, CO
When you remove the PTO, label it as coming off a 420, otherwise it will be useless to someone who wants one. PTO's are very hard to identify if off the trans. Could even put # of teeth and pitch(straight or helix) of the drive gear on it.

Ed

Last edited by EdPruss; Mon Jan 14 2019 02:23 AM.

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
Re: tranny ID [Re: doobspanel] #1294767
Sun Jan 13 2019 10:08 PM
Sun Jan 13 2019 10:08 PM
D
doobspanel  Offline OP
Wrench Fetcher
Joined: Jul 2018
Posts: 66
tucson az usa
good advice, thanks

Re: tranny ID [Re: doobspanel] #1295182
Thu Jan 17 2019 04:51 PM
Thu Jan 17 2019 04:51 PM
D
Dusty53  Offline
Shop Shark
Joined: Jul 2014
Posts: 427
North East Missouri, USA
You can purchase a PTO cover from Novak (see tclederman's earlier post) . Its Novak part number K-PTO , list for $41.00 . Enjoy!


Ronnie
1954 Chevy 3604 - A work in progress...

" You can't keep dancing with the Devil and wonder why you're still in hell"
Re: tranny ID [Re: EdPruss] #1295184
Thu Jan 17 2019 05:37 PM
Thu Jan 17 2019 05:37 PM
L
Lindsey  Offline
Shop Shark
Joined: Oct 2017
Posts: 170
Yellowknife
Originally Posted by EdPruss
When you remove the PTO, label it as coming off a 420, otherwise it will be useless to someone who wants one. PTO's are very hard to identify if off the trans. Could even put # of teeth and pitch(straight or helix) of the drive gear on it.

Ed


Are the PTO's sought after?


1953 Canadian GMC 9314 w/ (factory) Chevy 235
Re: tranny ID [Re: doobspanel] #1295188
Thu Jan 17 2019 06:21 PM
Thu Jan 17 2019 06:21 PM
tclederman  Offline
Boltergeist
Joined: Sep 2001
Posts: 27,501
Jarvisburg, NC
People with big trucks, in particular, might one one. If you have one, and you know what type/year transmission it came out of, post a Parts For Sale listing in the Swap Meet.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 50 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
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