u-joint loose on driveshaft
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Topic author - Posts: 344
- Joined: Sun Jan 06, 2019 2:36 pm
- First Name: Dennis
- Last Name: Prince
- * REQUIRED* Type and Year of Model Ts owned: 1)24 touring 2)25 TT's 1)26 roadster 2)26 tourings 1) 26coupe 1)27 funster 1)28 A pick up
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u-joint loose on driveshaft
Does anyone have cure for the u-joint being loose on the driveshaft, it moves enough to brake the pin that holds the joint to the driveshaft. I am hoping not to have to replace them. Thanks.
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Re: u-joint loose on driveshaft
Check the driveshaft and of course the inside dimensions of the u joint. They should not be breaking the retainer pin.
All the Best,
Hank in Tin-A-See
All the Best,
Hank in Tin-A-See
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Re: u-joint loose on driveshaft
Take out the broken pin and let the u-joint float. It will find its running position and no pin to break and come loose . Pinion thrust is always forward. No force is available to push the pinion into the ring gear.
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Re: u-joint loose on driveshaft
DO NOT LEAVE OUT THE PIN. If the pin is being broke, you need to find out why. The pin does two things, keeps the pinion gear from moving back into the housing at the rear and centers the U -joint in the housing in the front.
How is it loose? Stock pinion bearing or modern? Sounds like a lot of play in the parts if the driveshaft can move enough to the break the pin, time to open things up and look.
How is it loose? Stock pinion bearing or modern? Sounds like a lot of play in the parts if the driveshaft can move enough to the break the pin, time to open things up and look.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Topic author - Posts: 344
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Re: u-joint loose on driveshaft
As I stated in the original post, the looseness is between the joint and shaft, does anyone know of a good way to take up the clearance without replacing the joint and shaft? Thanks, Dennis
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Re: u-joint loose on driveshaft
Perhaps the pin is too small?
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Re: u-joint loose on driveshaft
Then try a different u-joint. I would suggest shimming but would be a real pain trying to fit shim stock without being able to see what thickness would be needed.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Re: u-joint loose on driveshaft
The joint and shaft are a slip fit. They should easily slip together and apart. If the fit appears sloppy, then maybe one of the parts (or both) require replacement. You do need the pin to hold pinion depth and to center the center line of the u joint inside the center of the ball. Without the pin, gravity allows the pinion to drop to zero backlash and most ring gears have a couple thousandths varience in backlash, so without the pin installed there will be some “hammering and binding” going on at the ring and pinion, unless you have a modern pinion installed... In which case you still have to keep the u joint centered in its ball.
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Re: u-joint loose on driveshaft
To put it simply, there is excessive wear in the joint or drive shaft. The joint should be a snug slip fit. If the fit is correct and the holes in the drive shaft and joint lineup there should very little or no noticeable movement when looking down through the holes when trying to move it back and forth.
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Re: u-joint loose on driveshaft
That is the best reason I've heard so far...for continuing to use the pin when using a modern pinion.
1924 Touring
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Re: u-joint loose on driveshaft
You may be able to slot the hole in the u-joint slightly so the pin doesn't take any torque. Just a band-aid, but probably would work ok untill you can take the time to replace things to spec. This happened because there is not enough lubrication in that area. Do you have a modern 4th main? These will starve the u-joint. I know that it is supposed to be lubricated from the grease cups but all things known, the engine oil does flow down the touque tube and into the rear end. Sometimes you even have to drain some oil out of the rear end. So I guess what I am trying to say is that the model T by design will sorta try to take care of itself.
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Keep it simple and keep a good junk pile if you want to invent something
Keep it simple and keep a good junk pile if you want to invent something
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Re: u-joint loose on driveshaft
Ted, this is wrong in so many ways. Please don't do that.
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Re: u-joint loose on driveshaft
Dennis,Dennis Prince wrote: ↑Wed Mar 06, 2019 10:46 amAs I stated in the original post, the looseness is between the joint and shaft, does anyone know of a good way to take up the clearance without replacing the joint and shaft? Thanks, Dennis
Take it apart, find out what's worn, and replace it. Anything else will be a band-aid and will be a temporary fix that you'll have to do over the right way anyway.
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Topic author - Posts: 344
- Joined: Sun Jan 06, 2019 2:36 pm
- First Name: Dennis
- Last Name: Prince
- * REQUIRED* Type and Year of Model Ts owned: 1)24 touring 2)25 TT's 1)26 roadster 2)26 tourings 1) 26coupe 1)27 funster 1)28 A pick up
- Location: Madras Oregon
- MTFCA Number: 22802
- Board Member Since: 1999
Re: u-joint loose on driveshaft
From the responses that I got I am guessing that no one has a good trick repair so I ordered a new u-joint and I have another driveshaft, I will see how the joint fits when it gets here. Thanks, Dennis