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| 1964 Valiant Vibration https://www.slantsix.org/forum/viewtopic.php?t=65366 |
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| Author: | dads 1st ragtop [ Tue Sep 22, 2020 6:22 pm ] |
| Post subject: | 1964 Valiant Vibration |
I recently bought my dad a 1964 Valiant Conv. ,1966-1967 slant six engine (re-built), original push button transmission (904 I believe) Car starts great idles fine, very little vibration if any at idle. Give it a little gas and the seat and steering wheel vibrate. engine not so much. Car vibrates hard so hard I'm afraid to drive the car -- don't wat to tear something up. Things i found and replaced: 1. had the wrong motor mounts (engine was sitting approx. 3 inches off) replaced no change in vibration. 2. changed transmission mount no change in vibration 3. adjusted valves 10 / 20 according to the book , they were off quite a bit. motor much quitter . no change in vibration 4. tune up with quality parts. (had a new tune up when i got it but parts were cheap) plug wires keep falling out off cap. no change I pulled the trans to check the flex plate and torque converter. Front shaft of transmission shows some scaring, torque converter button shows some wear. button measures approximately 1 1/2", crank shaft pocket seems to be slightly larger hard to tell maybe a 1/8" larger. flex plate is bent a little. I am ordering a new torque converter and flex plate. Am i on the right path? Is there anything else i can try? Thanks Kenny |
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| Author: | bcschief [ Tue Sep 22, 2020 6:38 pm ] |
| Post subject: | Re: 1964 Valiant Vibration |
sounds like you may have a small hub torque converter with a large hub crank You may want to measure them with a dial caliper and report back with the dimensions. |
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| Author: | Doctor Dodge [ Tue Sep 22, 2020 7:24 pm ] |
| Post subject: | Re: 1964 Valiant Vibration |
Sounds like a worn-out ball & trunion "U-joint" at the front of the drive shaft. Usually the outer housing gets worn so you may need to convert it over to a newer & more common cross type U-joint with a"slider" yoke.. Most drive shaft shops can handle the job. DD . |
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| Author: | dads 1st ragtop [ Wed Sep 23, 2020 4:56 pm ] |
| Post subject: | Re: 1964 Valiant Vibration |
measured converter button 1.50 to 1.52, crankshaft measured 1.54, flex plate has one tab bent. on another note the car has a rubber stopper in the transmission tunnel above the transmission that is crushed, should i replace it? |
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| Author: | dads 1st ragtop [ Wed Sep 23, 2020 4:59 pm ] |
| Post subject: | Re: 1964 Valiant Vibration |
vibrations happens while the car in in park, drove it off the trailer and into garage. haven't had it on the road yet. |
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| Author: | Joshie225 [ Wed Sep 23, 2020 6:04 pm ] |
| Post subject: | Re: 1964 Valiant Vibration |
If the right side motor mount is upside down the car will vibrate a lot. I did this when installing a rebuilt engine in my '66 Dart. |
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| Author: | volaredon [ Mon Oct 05, 2020 10:26 am ] |
| Post subject: | Re: 1964 Valiant Vibration |
Ok I'll agree with the idea of a bad B&T joint if it does this going down the road but sitting still? Wouldn't have anything to do with it at that point |
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