westaus29

Thanks for the video, it gives me hope! I initially saw your post from 2014 where you were trying to solve problem of 1926 Buick hard to put in gear. That's one issue I have, but it's not my car, it was my mate's and I am executor. It only started playing up yesterday, before that it was fine. There is no way I am going to pull the clutch out. The son-in-law last year helped me replace the diff after my mate blew it up. I got a lot of help from this forum and we both got a lesson on how hard it is to work on. Unfortunately my mate never got to drive it. And now it is hard to start and hard to get in gear and hard to sell. I just want to get back to working on my Plymouths - much more conventional engineering.

Finally had time to tackle this methodically with my son-in-law. Cleaned up the end of the spline, lined everything up then pulled the assembly into place with a comealong. Didn't need force just slid in smoothly and the axle housing also slid into place in the spring trunnions. Thanks again for the advice. By the way I now have a manual and it explains the strip down process well but does not state diff oil capacity. Plan is to use Penrite Transoil 140 API GL1

Thanks guys, that is reassuring. I was pretty sure I had done all the checking but I don't recall actually test fitting the spline. We have pulled the axle back a few inches and dropped the end of the torque tube so I can thoroughly check the spline for fit. We will then try a heavier pull.

Thanks everyone for the advice, followed it all except buying the manual and wish I had remembered to do so. We have the old torque tube out and the new one in, but cannot get the pinion shaft splines to slide into the back of the gearbox. Body is up on stands and the rear axle is moving freely on its rims but the @#$%^ shaft won't go into the gearbox uni joint. Suggestions requested. In the meantime I am going to double check that the splines on the new 1924 master shaft are same as the one we took out, which was 26 master. And I am going to order a manual. We are thinking about taking the universal housing off the back of the gearbox to see if that helps us line up the shaft but unsure what that would unleash.

Thanks Hugh, confirms what we have to do. Have checked 26 axles and they fit the 24 diff centre. The 24 and 26 third member bodies are same length, 53-3/4 inches. The 24 pinion shaft is 55 inches and 26 should be same but we are struggling to get it out to check as it is stuck at gearbox end. Tomorrow we will make a slide hammer to free it up. The 6210 bearings for the diff are readily available locally and pinion bearings are good. Still cant find the shop manual and have decided to proceed without as shipping to Aus is twice cost of manual and takes about 4 weeks.

Look up plymouth owners club on facebook and net. They are the goto and their mag lists many resources and is also online. There are a number of specialist suppliers, including Andy Bernbaum, Roberts, moparpro, Kanter. Egge have motor parts, Best have gaskets. And there are more. Good luck, it is a great looking car.

Thanks for the confirmation on pinion shaft and axle, just have to check actual dimensions before proceeding. I agree the 6210 has correct dimensions of 50mm id and 90mm od and fits the 24 diff which is good news as one bearing is rusty. The 26 diff ball bearings have od 93+mm and funnily enough a search on 3720 comes up with an imperial taper roller bearing of 3.6718 inch od or 93.26mm but can't find similar size ball bearings. Maybe possible to swap from ball to roller? Not an issue as do not have parts for 26 diff anyway.

Thanks guys, the plan is to keep the 26 rear axle assembly and swap out the third member and diff gears. Need to check pinion shaft and rear axles are compatible. Not ideal but could get us mobile. The bearings I had problems finding are the differential ball bearings, part 5.536. The 26 is ND 3720 and the 24 is ND 210 which is smaller od. I could not find modern equivalents.

Thanks for the replies, for some reason I am not getting notification. They give me a good idea how to proceed, if that is the preferred route. The 26 Master belongs to an elderly mate who can't find his shop manual. The problem is the ring gear and pinion lost teeth, possibly due to the pinion coming loose, not sure as I was not there when the diff was disassembled. Then the old ring gear and pinion were "lost", together with the half case and bearing attached to the ring gear. We have picked up what we think is an early 24 Master third member and diff assembly but cannot just swap the diff as the 24 ring gear and its bearings are smaller diameter and do not fit in the 26 third member and adapter bearings do not seem to be available. The 24 third member looks to be same design and length as the 26 so we are thinking about swapping in the 24 third member and diff so we can at least get the car mobile and off the car hoist. So the consensus of your advice is the back axle assembly has to be moved back. Appreciate the various suggestions on best way to do it. Wish it wasn't so heavy as am not getting any younger. Useful comments welcomed.

What are the steps involved in removing the torque tube from a 1926 Buick Master model 45? From what I can see posted here you have to move the rear axle back? I also dont know how or where best to disconnect the front end from the gearbox where I presume there is a uni joint. My experience is with Chrysler setup which is quite different.

Take a look at the Plymouth Owners Club group on facebook and also join the club, lots of help available

I have a partial Master parts list and it shows the 26 Master ratio is 4.70 and parts are one year only, except 25 Master has same ring gear, but different pinion. Our club has access to several Standard diffs but they are all smaller diameter ring gear and smaller axle housing.

Still looking for crown wheel and pinion for 1926 Master, but now we also need the differential cage or case as well, or at least the end flange that the crown wheel is rivetted to, as the original crown wheel has been lost and it was still rivetted to the end flange as shown in the picture in the original post

Thanks I have checked this out. That crown wheel is much larger diameter, 12+ versus 11 inch for ours. We have also seen a standard crown wheel and that is only 10 inch.

Looking for a replacement crown wheel (ring gear) and pinion for a 1926 Buick Master The existing unit has a crown wheel with 47 teeth and pinion with 10 teeth. The crown wheel ID is 6-1/2 inches and OD is 11 inches Sourced from Australia preferred Contact: jjmather70 at gmail dot com

Looking for a replacement crown wheel and pinion for a 1926 Buick Master The existing unit has a crown wheel with 47 teeth and pinion with 10 teeth. The crown wheel ID is 6-1/2 inches and OD is 11 inches