Removing Mainshaft to U-Joint Yoke Nut

mars55

I am trying to remove the transmission mainshaft to U-joint yoke nut from my '49 Hudson six with overdrive and it is not coming off. So I thought I would check here to make sure that the nut is not reverse threaded and for any other hints on removing nut.

Thanks

Geoff

No, it is not left hand thread. Use a bigger socket handle. You can try shocking it loose. Put the gearshift in reverse, and use a blunt chisel and 5 lb hammer. if the tranny is off the motor you can use a large Stillson wrench on the yoke to hold it from turning. Good luck.

Marconi

Make sure overdrive is locked out, put trans in low or reverse,get a long handled wrench, grunt a lot! Good luck. BTW, a sI remember that's a lock nut on there, you know, the kind that sorta looks like a castle nut with saw slots instead of notches for a cotter pin.

barrysweet52

Perhaps you could get a 3' long piece of heavy angle or RHS, and weld a few pieces of steel around one end to make a hollow box shape that would fit over the yoke to hold it in place. Then wedge it in a convenient spot. Then use 1/2" drive sockets and the longest bar possible to break the seal of the nut. A bit of preparation work, but no damage to the gears. Other HETers can then borrow your tool also. Barry

Clutchguy

I guess you are wanting to change the center carrier bearing?. If so, you already have the driveshaft out. If you are not planning on changing the u-joints,tape the caps in place so they don't fall off. Take the driveshaft over to the work bench and put the yoke of the center u-joint in the vise. Don't over tighten it,but this should hold it while you loosen the nut. I use a very large pair of slip-joint pliers and haven't had any problems. If you are trying to remove the nut on the output yoke of the trans., again the large slip-yoke pliers to hold the u-joint yoke,rachet the nut off. I use an inpact while holding it. It should be a nut,lock washer and a special,keyed flat washer. Good luck

Park_W

I use a LARGE pipe wrench to hold the u-joint trunnion and an impact wrench and 6-point socket to remove the nut.

mars55

Thanks for all your help guys. I am trying to replace the rear transmission seal. I was almost sure it was not reverse threaded, but wanted to sure it was not before getting radical. I have the tool to hold transmission yoke and I have tried a impact wrench with no success.

barrysweet52

There are several types of aerosols pressure packs that might help. I believe they somehow break the seal allowing a little penetrant to get in. Im not talking about the CRC product. See if any of your friends have one. I also have had a lot of success with a small torch I use for pot metal repair.It fits onto a small camping gas cyl. Again the expansion breaks the seal of the nut that hasnt been touched for 50 years. Barry