50 1 ton rear pinion seal part #

[NiftyFifty]

Anyone have some part numbers for the 1 ton rear axle pinion seal? Napa, national or CR?

[Dodgeb4ya]

The OE MoPar # is 1271105. It  crosses to a CR#18924. I see the MoPar OE # on ebay quite a bit as it also fits the 40's and early 50's Chrysler LWB Crown Imperial rear axles too.

Bob

Edited October 26, 2013 by Dodgeb4ya

[Merle Coggins]

That brings up a question I've thought about from time to time. Would the diff from a LWB Chrysler Crown Imperial that you mention fit into a 1 Ton axle? I've heard on a couple of occasions that they are larger than the normal Plymouth and Dodge passenger car diffs. And the 1 ton is a bit larger than the 1/2 and 3/4 ton diffs. If the larger Chrysler diff would match up to the 1 ton axle it may offer some different ratio options for those with the "D" models.

 

Merle

[NiftyFifty]

So I'm guessing no drive to the parts store and pick one up numbers?  The one on e-bay came up as the 3/4 ton model, is that still correct for the 1 ton with like 4:10 or 4:11's?

[Merle Coggins]

A quick check at Napaonline.com shows the OEM number Bob posted crosses to that same National Seal number. Give 'em a call and see if they have one in stock. They might have them at the local warehouse and could have it for you the next day.

 

Merle

[NiftyFifty]

Apparently that seal is incorrect, not the same size. The OD is about 4"s on this diff.

[MBF]

I got mine through NAPA a couple of years ago.  I believe it was a National Seal p/n.  I'll update this response in the morning-I think I wrote that number down in my maintenance logbook in case I ever needed it again.   When you pull the yoke-check to see if there is a groove worn on the surface that the seal lip rides on.  I had to put a speedy sleeve on mine.  Mike

[Dodgeb4ya]

The 1940-52 Crown Imperial diff case/hogs head  will bolt into a 1 ton housing. Same 16 spline axles too. But the Crown Imperial uses a centering block for axle end play control.The DT 1 tons are full floater axles that don't require the centering block.

3.58 is the  Crown Imperial ratio. I have one and have not yet tried the complete swap yet. These rear ends are pretty rare-roughly 250 Crowns made each year!

As for the seal cross over I have always used the Mopar seasl-never attemped to cross it to modern #'s as I never needed a modern seal. 

1 Ton yokes do get worn quite bad and usually require a speedi-sleeve as mentioned..

Bob

Edited October 23, 2013 by Dodgeb4ya

[NiftyFifty]

Yoke is ok I guess, just needs a seal to be put back together. The OE number my buddy found was OE Chrysler # 928114, and he crossed that to a national but he wasn't 100% sure that was right but he knows the other number was too small that was mentioned above.

[P15-D24]

I would try Vintage Power Wagons. 

[Dodgeb4ya]

1 ton (D) Pinion Seal # 1271105 out of dodge truck parts book....

[NiftyFifty]

I wish somebody had one of these laying around to measure! When he started with that number and they crossed it I believe it was too small

[Dodgeb4ya]

Yoke is ok I guess, just needs a seal to be put back together. The OE number my buddy found was OE Chrysler # 928114, and he crossed that to a national but he wasn't 100% sure that was right but he knows the other number was too small that was mentioned above.

928114 seal fits WDX and PW power wagons-not B-series 1 ton trucks.

[Dodgeb4ya]

I wish somebody had one of these laying around to measure! When he started with that number and they crossed it I believe it was too small

You're wish has been granted..Ddodge B2B rear end yoke and NOS MoPar seal.

Bore size  3.505"

Shaft size 1.876"

Bob

Edited October 23, 2013 by Dodgeb4ya

[NiftyFifty]

See here's the issue, the seal he removed is just shy of 4"s and the other one wasn't large enough.... I wonder if there was some Canadian differences in that year or ??

Thanks so much for the pics DB4ya!

Edited October 23, 2013 by 4mula-dlx

[NiftyFifty]

There just has to be a canadian difference, my friend has 2 identical 1 ton rear ends here both out if 50 1 tons and I pulled my drums off my parts 1 ton and it was exactly the same too. I guess were just a little bigger and beefier here in Canada

[Dodgeb4ya]

You've got a problem! Might be a PW rear end.

Edited October 23, 2013 by Dodgeb4ya

[Dave72dt]

Time to get the calipers out and measure, then match to a seal by size.

[NiftyFifty]

Time to get the calipers out and measure, then match to a seal by size.

That's exactly what was done originally, so he had all the numbers to work with to compare seals. But as I say, he's got 2 identicle diffs in the shop, and is doing a swap for the guy seeing as running the original with no oil for possibly year did not work well for it. I really think there are some big differences between the trucks in each country. Can't be just coincidence that 3 seperate trucks all have the exact same diff, and possibly 4 if I hadn't scraped the original from my truck.

[JBNeal]

I recall seeing in one of the Bunn books an early C-series cab & front sheet metal mounted onto a Power Wagon chassis and was listed as a "special order".  It may have been possible that a regional dealer ordered a slew of 1-tons (possibly as a fleet arrangement with an owner-operator, maybe even a govt entity) and these trucks eventually found their way into the ownership of the general population.  The local TXDoT office had a big auction back in '88, selling a bunch of their distinguishable construction yellow Chevies, and people came from far & wide to snatch these up as they were well maintained work trucks with ACs.  Dad got a sgl wheel 1 ton, a few guys at church got the crew cab sgl wheel one tons for their personal businesses, several area farmers got the 4x4 duallies, and all used them for another 10 yrs before they all eventually changed hands again then faded from view.

 

When I got the '49, I noticed the similarities between it's 1-ton rear axle & the Power Wagon rear axles and assumed they were almost identical.  As a guy in NC was selling surplus Power Wagon parts on eBay, I snatched up axle seals for pennies compared with new versions available from NAPA.  I eventually acquired a MOPAR parts manual that included B-series, Power Wagon & Route Van parts listings.  Doing some cross checking, the only similarities between the B-series D rear axle & the Power Wagon rear axle were the inner & outer hub seals, axle shaft flange gaskets, and axle shaft flange studs.  So I have some Power Wagon pinion seals that measure 4.000" OD, about 1.780" seal ID, outer bore depth 0.605", inner bore depth 1.005".  These are stamped TROSTEL DF 240-156-12.  They appear similar to what is listed on the T137 site.

[NiftyFifty]

That sounds like the right seal size, so it must be an axle that was used here in Can. My trucks came a long ways from home so I'm guessing they were just using that axle in 1950/51 in the Ontario plant for all D series 9 ft box trucks.

[wrenchman]

I'm the lucky one looking for the pinion seal for the '50 Dodge 1 ton pick-up. As 4mula-dlx has stated it is a 4" O.D. seal. This is, believe it or not, a one owner vehicle and the seal in it is the same as the donor axle (also out of a 50 one ton). I have a National seal on order that I expect is the correct one. When I get it I'll leave feedback here about correct (or not) fit and the part #.

 

I belong to a number of forums and I'll say this: Not too many are as helpful as this one for people going out of their way to try and supply good information. Thanks to everyone that posted a reply.

[Dodgeb4ya]

I'm glad I own no Canadian produced vehicles or I'd be in trouble!

Edited October 24, 2013 by Dodgeb4ya

[NiftyFifty]

I'm glad I own no Canadian produced vehicles or I'd be in trouble!

Don't worry, the Canucks on the site could help you out on these tough northern trucks

As for wrenchman..... That vehicle list seems a little "fordy" to me

[wrenchman]

As the list says at the bottom "it's not always about Dodge". Truly though, I've had many a mopar and will always have a spot for one, both in my heart and my garage.