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Mod | | | Forums66 Topics128,022 Posts1,055,376 Members48,420 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | This may be a post for the driveline section, but I figured because it specific to bigger trucks it would fit here. I pulled the PTO off of my truck because it was leaking. I searched all of the numbers on it but I can't figure out what it is. I would like to order a seal kit for it so i can put it back on. Does anyone know what I have? [img]http://i.imgur.com/vwMmRNf.jpg[/img][img]http://i.imgur.com/BijrCZg.jpg[/img]
Last edited by AdamK1500; 06/22/2018 1:38 PM.
1954 GMC 350-27
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy AdamK1500, PTO identification has always been a mystery to me, what with all the different companies merging or going out of business. There is a code or system to their numbering at least for some of them, things like torque capability, type of shift, direction of rotation etc.. What I have done in the past is measure the shaft diameter and the housing seal bore and order a seal, some of those seals have been a rather unique shape. I'll see if I can locate some numbers. | | | | | Joined: Dec 2015 Posts: 2,062 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,062 | When I had mine off, I was able to get the # off the seals and found some replacements on Ebay. | | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | I'll pull the seals this weekend and see if I can find any numbers on them.
Thanks for the help!
1954 GMC 350-27
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Seals are usually obtained by dimension. PTO's are usually ID'd by transmission, since tooth count, pitch, depth are different for each trans.
Ed
'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.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | I got the seals out and measured. Just for reference for anyone looking, motion industries has a pretty large selection of oil seals to pick from.
1954 GMC 350-27
| | | | | Joined: Jun 2018 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2018 Posts: 46 | Since the dump bed was removed on mine but the the hoses going nowhere I gues I should pull mine off and start cleaning it up. May as well pick up a parts cleaner from the cheap import store, I have a least that much grease on mine.
Stuff I’m gonna work on, I swear
1963 C30 flatbed
1961 Apache 30 (parts, no title)
1960 GMC Big Bolt
Don't tweet, face, Google, or link. Just hanging in as long as I can...
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If one takes off a PTO, it is always a good idea to mark what trans it came off, otherwise it will become useless, someone else might want to use it someday.
Ed
'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.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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