Thought I'd run this by the group in case someone possibly had seen something like it before.
Recently the truck (hauler) started to shake or chatter when I would have to brake hard at low speeds like coming to a stop sign. Once it started it would continue to do that until it the truck came to a stop. It would do it even if I put it in neutral so once it starts it continues no matter what I do until the truck stops. Wish I could explain better what it does you would probably have to have ridden in it to know. I guess one way to describe it is, like something is gabbing the drive shaft, lets loose, grabs it again, etc.
It had the second leaf in both rear springs broken where it curls into the bushing at the front. I thought this might be it so bought two new springs and put in and didn't help. In fact it is worse but not sure the springs are the reason.
Yesterday I loaded the '51 and started to to strip but as soon as I drove out the drive way I could tell it was a lot worse. It did it without even applying the brakes and was doing it on starting out. Seems to get better with a little speed but slowing down it is BAD!
Turned around and came home, unloaded the car and when I drove it to the barn it was not as bad as it was with the car on it.
I've taken both drums off and both inner and outer bearings on both sides are fine, drums not broken, with both axles out the pinion turns free as can be with no noise, with axles in can't hear any noise, etc. I jacked both sides up one at a time before taking it apart and ran it up to 30 mph in high gear, tried braking, no noise, let it spin in neutral, etc. Nothing I did would make any noise or chattering. Also no noise cruising down the road.
I was going to take the rear center section out thinking it might be a carrier bearing or loose ring gear, etc. but hate to do that since it makes no noise at all going down the road or setting still spinning. Surely it would make some howling or some noise if it were any of these. It does seem to have a little extra back lash but not that excessive. Supposed to be .006" to .012". Only guessing but would guess about .050" by using the yoke.
I've looked the frame over and can't find any cracks, looked at cross members, etc.
The rear U joint at the pinion is loose enough you can feel it but not drastic and it will turn easily and smooth in both directions without any binding. Other than taking the pig out, I'm at a loss as to what to do next. I will put a new U joint in but really don't see how that could be the problem.
All four wheel bearings look good as do the races, can't find any bad rollers, etc. Don't know that they would do this any way and again surely would make some noise.
If anyone has heard of anything like this or have any ideas, let me know. Would like to get it fixed this week as want to go to the Indy Goodguys Hot Rod Nationals this week end and Michigan for a pure stock race next week end.
Ted
Recently the truck (hauler) started to shake or chatter when I would have to brake hard at low speeds like coming to a stop sign. Once it started it would continue to do that until it the truck came to a stop. It would do it even if I put it in neutral so once it starts it continues no matter what I do until the truck stops. Wish I could explain better what it does you would probably have to have ridden in it to know. I guess one way to describe it is, like something is gabbing the drive shaft, lets loose, grabs it again, etc.
It had the second leaf in both rear springs broken where it curls into the bushing at the front. I thought this might be it so bought two new springs and put in and didn't help. In fact it is worse but not sure the springs are the reason.
Yesterday I loaded the '51 and started to to strip but as soon as I drove out the drive way I could tell it was a lot worse. It did it without even applying the brakes and was doing it on starting out. Seems to get better with a little speed but slowing down it is BAD!
Turned around and came home, unloaded the car and when I drove it to the barn it was not as bad as it was with the car on it.
I've taken both drums off and both inner and outer bearings on both sides are fine, drums not broken, with both axles out the pinion turns free as can be with no noise, with axles in can't hear any noise, etc. I jacked both sides up one at a time before taking it apart and ran it up to 30 mph in high gear, tried braking, no noise, let it spin in neutral, etc. Nothing I did would make any noise or chattering. Also no noise cruising down the road.
I was going to take the rear center section out thinking it might be a carrier bearing or loose ring gear, etc. but hate to do that since it makes no noise at all going down the road or setting still spinning. Surely it would make some howling or some noise if it were any of these. It does seem to have a little extra back lash but not that excessive. Supposed to be .006" to .012". Only guessing but would guess about .050" by using the yoke.
I've looked the frame over and can't find any cracks, looked at cross members, etc.
The rear U joint at the pinion is loose enough you can feel it but not drastic and it will turn easily and smooth in both directions without any binding. Other than taking the pig out, I'm at a loss as to what to do next. I will put a new U joint in but really don't see how that could be the problem.
All four wheel bearings look good as do the races, can't find any bad rollers, etc. Don't know that they would do this any way and again surely would make some noise.
If anyone has heard of anything like this or have any ideas, let me know. Would like to get it fixed this week as want to go to the Indy Goodguys Hot Rod Nationals this week end and Michigan for a pure stock race next week end.
Ted
]
Comment