I will be using the Fun projects modern pinion bearing replacement. As I understand it, the driveshaft bushing no longer controls the movement of the shaft to the rear as the FP bearing does that.
So can I remove most of the facing on the bushing ? How much do you leave?
I left it all. Didn't find any reason to mess with it.
Hi Bud, I agree with Steve...no reason to mess with it...however, please don't look too long at the bushing in the pic above. I followed Steve's lead and polished the face of the bushing then clear coated it to keep a good shine on it. Ya...no one will notice it, but I've have a reputation to uphold. Sorry about the blurry pic Steve !! W
I take off most of the bushing face as it is no longer needed and can only cause interference when you pin the u-joint to the driveshaft.
My concern was fitting the bushing and then finding I didn't have enough clearance for the U joint.
Since I don't have a facing reamer I would have to remove the bushing to turn it down - not fun!
If its too tight I wonder if I could take a little off the U joint?
Probably better to use Erik's idea to be safe.
If you'll do that for a part that will never be seen, I'd love to see the rest of the car !!
I don't see how you could get enough pinion gear depth if you don't face it off some. The repro bushing is thicker than an original Ford babbitt bushing.
If you are using the fun projects pinion bearing then you could have that drive shaft bushing faced off .080" prior to pressing it in.
My method: I face .100 off the bushing before I press it in. Install the U joint and use .010 arbor washers to bring it back to a snug fit. Due to variation in the length of the tube, driveshaft, etc., etc. it take from one to four washers.
I believe it is good practice to have the U joint tight against the bushing.
Your mileage may vary.
I totally agree with Stan, that is the best way to go. I use a Stevens U joint spot facer to set the clearance between the U joint and the bushing.
I don't pin it or face it when using a fun projects bearing.
I never rely on that small set screw to keep the Drive Shaft end play in place. I always set the set screw and then set up the Drive shaft end play the original way. You then have a fail safe assembly that will still work if the set screw comes loose. A little more work but better safe than sorry
I have the John Stolz bushing, and, like Jeff, no pin.
Not pinning the u-joint allows it to wander up and down the shaft to the point of binding. I believe John R. recommends pinning.
In a previous thread several years ago, John R was just squeamish about not pinning. I guess you could call that a recommendation. The ujoint centers automatically, better than pinning can do.
I suppose you don't absolutely have to pin it as long as the hole in the U joint and the hole in the drive shaft line up. What I see as the problem is that with the bushing left too long and the U joint setting forward of the correct position by whatever amount the bushing is too long; the center line of the U joint is forward of where it needs to be and the front edge of the U joint can be forced too far in to the end of the transmission female end. It can bind just enough to make the U joint vibrate. The more weight in the car and the worse it will vibrate. Also, it can cause damage to the U joint, the 4th main, etc.
I pin 'em. I see no advantage to not doing it except saving five minutes on an expensive and time consuming rebuild of a differential assembly.
Totally agree with Stan.
Not pinning the U joint makes it rely on the not so accurate fit of the U joint to the drive shaft. It's bad enough having a not so accurate fit at the engine to U joint end. My opinion, you are asking for U joint failure if you leave the pin out. It takes about a minute to install that pin. I can't imagine why anyone would leave it out.
My problem that I am working on is that I am installing a Model A trans behind a T engine . I have the driveshaft tube mated to a T and the driveshaft modified to fit a T pinion . Will use fun project pinion bearing kit . Do I need to pin the Model A u joint? Will the set screw be enough? Should I pin it?