Driving along, then boom and crunch

[Barry B./ Ma.]

Same thing happened to me in 1981 driving up to my aunts to give her a ride in the 29 spec. coupe. Took out 2 teeth in the ring gear and 1 in the pinion. What a bang! Sure knocked the dust off the floor. Had another rear end for parts so we had her back on the road the next day. Your experience reminded me, never want a repeat.

[dynaflash_8]

Got my spare parts and started tearing into it. Ill keep this thread updated as i go along. Also, heres some pics of my pre - 1950 traditional rpu in progress. More a Hamb canidate, but its gonna be fun. Dont worry, ol Maybell is gonna stay stock.







Broken case right by the clamshell

[1931 flamingo]

NICE shop ! ! !
Paul in CT

[dynaflash_8]

so i got back to work on it. Parts ordered from synders should be here thursday. Rearend is shot. Missing teeth on a spider and locked the pinion up. That in turn broke the u joint, transmission case, sliding gear, and the clutch is shot too. Whoo!

[Joe K]

Be curious to know how many parts are "original" and how many are modern market.

As I do up my NEXT rear end, I might choose to do a lot more "new" if there seems to be advantage to do so.

Joe K

[Tom Wesenberg]

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This is a good time to go with the 3.27 or 3.54 ratio ring and pinion.

[Rock Hornbuckle]

Dynaflash 8, I'm in Auburn also. If you wish, I would like to see what happened and offer my help with the project.

[dynaflash_8]

Hey rock, pm sent.

Tom, im gonna need alot stouter engine before i go thinking like that :P

Joe, as far as i can tell, most parts are original, but it appears someone has had it apart before ie: mismatched bolts. all of the rivets sheared off the u joint. I picked up a rebuilt transmission complete from hogs head to clamshell, and have a good rearend. Im gonna take this oppurtunity of having the engine out to drop the pan, address some leaks, and adjust the rod caps. Also ordered a new manifold to try and get rid of that pesky exhaust leak.

[Joe K]

All of the rivetrs sheared off the U joint

Assuming you have the earlier and original "ring" style UJ. Cross style has spring clips.

Joe K

[dynaflash_8]

Originally Posted by Joe K

Assuming you have the earlier and original "ring" style UJ. Cross style has spring clips.

Joe K

i imagine so yes. Im not too studied on the differences. Its a 30' standard.

[Joe K]

The original or first design had a circular ring with four "trunnions" formed into the ring. The input and output splines each engaged two opposite of the trunnions with two "ears." There are like 8 rivets that hold the two halves of the ring together and encircle the ears.

The later design (it started even before Model B I believe) was essentially a modern U joint with a "cross" and input and output yokes. Each yoke engaged the cross at two opposing points.

Joe K