something is vibrating pretty bad.
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Elder User
Joined: Aug 2003
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From: iowa
something is vibrating pretty bad.
this problem started just the other day. i was working on motor and had undone one of the motor mounts to jack the engine up a little on one side. that being done i reinstalled everything and went for a test drive. i now have a vibration. I checked the motor mounts and there both fine and i checked the main trans mount and it seems fine. i did notice my bearing thing has a little play in it, but it seemed normal but i dont know what normal for this really is. i am getting a clanking sound when i go from frwd to rev and rev to fwd. Could i have broke something by jacking up the motor ? i have done this before in other vechiles and never had a problem. the truck i talking about ia the one in my sig. any ideas ?
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Elder User
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From: iowa
well as i laid under the truck and had a tructed friend do the work up top, i heard clanks from what i thought was the rear end, but sometimes it sounded as it was coming from tranny too.
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Elder User
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From: iowa
okay the split shaft bearing does sound like the culprit in my vibration, but as to the clanking, the sounds come after the shift has been made not during, you shift to rev and the clank comes as it goes into gear, same happens when shifted from rev into drive., this clanking was happening before i jacked the motor. i just never really noticed it until i got the exhaust quieted down.
Lead Driver
Joined: Jan 2003
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From: Ohio
Give the driveshaft a twist. Does it rotate back and forth pretty far?? Then the clank is the wear in the rearend. The lash in the ring gear is causing the noise. It bangs back and forth from the drive side to the coast side.
Larry
Larry
Post Fiend
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From: Black Hills of SD
I will add that you need to do this with the pickup in neutral, with the wheels blocked for safety. It is not uncommon for an aged 9 inch to have a bunch of slack in it. I had a 66 with almost a quarter turn. As for the vibration my first suspect would be a u-joint which would also account for the driveline slop.
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Lead Driver
Joined: Jan 2003
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From: Ohio
Good point willowbilly3......it's the small details. I would have done it that way, but it's easy to forget to tell someone else.
Thanks for filling in.
Larry
Thanks for filling in.
Larry
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Post Fiend
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From: Black Hills of SD
Freightrain, Alot of times 1 plus 1 makes more than two. I gave the same advice to people who I just assumed would put it in nuetral or forgot to mention it and they came back saying it was all tight so I start thinking outside the box coming up with more ideas when in fact the problem would have been found right away. It's just a small thing. I still want to know about that 5 speed you have in the wagon. I have a very unmolested 64 2 door post with 58,000 miles that is just begging me for a V8, and since it is already a stick It has most of the hard work done to make it a 4 speed or 5 speed car.
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Elder User
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From: iowa
well the shaft seems tight, i had it in netural but with the brake on, i live on a little hill. didnt seem to have any real give at all. my split shaft bearing does though, i can push it back and forth like a 1/4 inch , but it looks like it is supposed to do that with that rubber mount and all . i dont know though, this the first time i ever messed with a split shaft
Post Fiend
Joined: Jun 2003
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From: Black Hills of SD
A quarter inch play in the rubber on a carrier bearing is not unusual. A new one would probably do the same thing.
Are you sure you checked the front u-joint? it easy to miss when you do the drive line thing because there will be no resistance there. Since this all started after you jacked up the engine I am still suspect of the driveline or u-joint. If you didn't check the front u-joint real good you may want to have another look. Pudh up and down and side to side right at the fromt u-joint and check for slop. Also hold the tranny yoke with one hand and the driveshaft with the other and twist back and forth. Look and see if there is any fresh, bright rust around the caps where they go on the cross. That is a sign that the needles are history when they start throwing rust. Also if that all checks out ok then set the rear end on jack stands and put it in gear. Observe the drive shaft as it turns and see if it is running concentric or not.
Are you sure you checked the front u-joint? it easy to miss when you do the drive line thing because there will be no resistance there. Since this all started after you jacked up the engine I am still suspect of the driveline or u-joint. If you didn't check the front u-joint real good you may want to have another look. Pudh up and down and side to side right at the fromt u-joint and check for slop. Also hold the tranny yoke with one hand and the driveshaft with the other and twist back and forth. Look and see if there is any fresh, bright rust around the caps where they go on the cross. That is a sign that the needles are history when they start throwing rust. Also if that all checks out ok then set the rear end on jack stands and put it in gear. Observe the drive shaft as it turns and see if it is running concentric or not.
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Elder User
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From: iowa
i got back under it last night, it is the u joints i am pretty sure of it now. i can move one of them around pretty good, i just cant beleive that this much vibration comes from that, never had that happen before.
Post Fiend
Joined: Jun 2003
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From: Black Hills of SD
I have had ujoints so bad that they wore through the caps into the yoke and never gave much hint. Other times they vibrate like crazy as soon as the needles disintegrate. I guess if the needles shift and the whole shaft is then off center it would account for the vibration.
Lead Driver
Joined: Jan 2003
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From: Ohio
willowbilly3...........as for the wagon 5 spd, it is a Doug Nash 5 spd. If you are familiar with it(it's the original version before Richmond bought them). Pro-shifted with torsion tube. The torsion tube is an extended countershaft that has small bar running thru the middle that gives it "flex" and takes some of the shock. With 4100 lbs leaving at 5500 rpm it takes all I can give it.
If you check my website there are a few pics of all my stuff. I think there is a link in my gallery.
Larry
If you check my website there are a few pics of all my stuff. I think there is a link in my gallery.
Larry
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Elder User
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From: iowa
well i had one real bad end on the ujoint, it was actully wore down, jeeze never seen that bad before, but i changed it and lo and behold the vibration is gone. one more question, how do you get that damn shaft split carrier bearing off the shaft. i picked up a new one and i tried to get it off, is that thing pressed onto the shaft ?