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67 GTX that is bound and determin to be a vibrator #1325820 10/25/12 10:33 AM 10/25/12 10:33 AM
Joined: Mar 2009 Posts: 313 south central nebraska G GI Moparman OP enthusiast
GI Moparman OP enthusiast G Joined: Mar 2009 Posts: 313 south central nebraska	A friend of mine has a 67 gtx that was restored bout 10 years ago and is very anal about how it is taken care of. He put it away last fall and when it came out of hibernation this spring it had a vibration that wasnt noticed before. Had tires checked and rebalanced, tried a different set of tires, 3 different drive shafts and even had the last one sent in and rebalanced. We put new motor mounts and trans mount in and the vibration is still there. The vibration starts in at about 75 to 80 and stops when you get over 100. If you run it up to about 110 and let out of it, when it gets down to about 90 it really gets bad down to about 75 then stops vibrating. I know what the speed limits are and tried to explain that to him but he says it shouldnt vibrate at any speed and he is right. Any ideas?

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325821 10/25/12 10:52 AM 10/25/12 10:52 AM
Joined: Jan 2009 Posts: 222 Canfield,Ohio,USA G gassy66 enthusiast
gassy66 enthusiast G Joined: Jan 2009 Posts: 222 Canfield,Ohio,USA	Can You feel any vibration in the Engine,running It in neutral??

Re: 67 GTX that is bound and determin to be a vibrator [Re: gassy66] #1325822 10/25/12 11:18 AM 10/25/12 11:18 AM
Joined: Mar 2009 Posts: 313 south central nebraska G GI Moparman OP enthusiast
GI Moparman OP enthusiast G Joined: Mar 2009 Posts: 313 south central nebraska	No vibration in neutral. We have taken rpm up close to 5ooo and engine is smooth as can be.

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325823 10/25/12 11:19 AM 10/25/12 11:19 AM
Joined: Nov 2005 Posts: 15,118 85086 moparpollack Lil Herman
moparpollack Lil Herman Joined: Nov 2005 Posts: 15,118 85086	A friend with 35+ years in the frame and alignment business says vibrations over 60 mph are usually tires or wheels. Has he swapped wheels and tires or just tires from possibly the same balancer? 56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d

Re: 67 GTX that is bound and determin to be a vibrator [Re: moparpollack] #1325824 10/25/12 12:51 PM 10/25/12 12:51 PM
Joined: Mar 2009 Posts: 313 south central nebraska G GI Moparman OP enthusiast
GI Moparman OP enthusiast G Joined: Mar 2009 Posts: 313 south central nebraska	we put a set of wheels and tires off of a different car on it and it had same vibration with the new wheels and tires.

Re: 67 GTX that is bound and determin to be a vibrator [Re: moparpollack] #1325825 10/25/12 02:09 PM 10/25/12 02:09 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Driveline angle... "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325826 10/25/12 02:12 PM 10/25/12 02:12 PM
Joined: Oct 2011 Posts: 290 Dayton, WA wesgtx440 enthusiast
wesgtx440 enthusiast Joined: Oct 2011 Posts: 290 Dayton, WA	I would check bearing play on all wheels. I had a rear axle shaft bearing start to go bad on me and it caused vibration. They do get dry sitting over the period of a few months as they are lubricated by the differential fluid.

Re: 67 GTX that is bound and determin to be a vibrator [Re: wesgtx440] #1325827 10/25/12 02:20 PM 10/25/12 02:20 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: I would check bearing play on all wheels. I had a rear axle shaft bearing start to go bad on me and it caused vibration. They do get dry sitting over the period of a few months as they are lubricated by the differential fluid. Not an 8.75 or a Dana.. "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: 67 GTX that is bound and determin to be a vibrator [Re: 1_WILD_RT] #1325828 10/25/12 02:26 PM 10/25/12 02:26 PM
Joined: Oct 2011 Posts: 290 Dayton, WA wesgtx440 enthusiast
wesgtx440 enthusiast Joined: Oct 2011 Posts: 290 Dayton, WA	Yep, the outer bearing on an 8.75 and dana 60 for each rear axle shaft is lubed by the gear oil.

Re: 67 GTX that is bound and determin to be a vibrator [Re: wesgtx440] #1325829 10/25/12 02:40 PM 10/25/12 02:40 PM
Joined: May 2004 Posts: 5,123 Warrenton, VA RoadRunnerJD master
RoadRunnerJD master Joined: May 2004 Posts: 5,123 Warrenton, VA	Quote: Yep, the outer bearing on an 8.75 and dana 60 for each rear axle shaft is lubed by the gear oil. I don't think so. Mine has an axle seal between the bearing and the end of the tube where the gear oil would come from...you have to pack your axle vearings with grease or they will burn up. I have the "Green" sealed bearings anyways...not that they are worth it. I also have a vibration that starts about 75-80 mph. I think it is in the rear end differential but am just trying a different set of wheels and tires this weekend? We'll see? I wonder if it could be the clutch plates in the sure grip being stuck together from sitting or something? When I push the car in neutral with the engine off, there is a clunking every revolution like something is sticking.

Re: 67 GTX that is bound and determin to be a vibrator [Re: wesgtx440] #1325830 10/25/12 02:50 PM 10/25/12 02:50 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: Yep, the outer bearing on an 8.75 and dana 60 for each rear axle shaft is lubed by the gear oil. As JD sez sorry, no.. The bearing is sealed from gear oil intrusion & should be packed in bearing grease... "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325831 10/25/12 03:25 PM 10/25/12 03:25 PM
Joined: Jan 2009 Posts: 222 Canfield,Ohio,USA G gassy66 enthusiast
gassy66 enthusiast G Joined: Jan 2009 Posts: 222 Canfield,Ohio,USA	Is the rear end a "sure grip" ?? If so, I'm suggesting that the differential be pulled out and examined.. I have a hunch that the clutch pack may be the source of the vibes...

Re: 67 GTX that is bound and determin to be a vibrator [Re: gassy66] #1325832 10/25/12 03:40 PM 10/25/12 03:40 PM
Joined: Oct 2011 Posts: 290 Dayton, WA wesgtx440 enthusiast
wesgtx440 enthusiast Joined: Oct 2011 Posts: 290 Dayton, WA	I stand corrected. It has been a few years since I did one and I had myself convinced that they were lubed by the gear oil. Still something to check though.

Re: 67 GTX that is bound and determin to be a vibrator [Re: gassy66] #1325833 10/26/12 01:14 AM 10/26/12 01:14 AM
Joined: Feb 2007 Posts: 1,608 fresno ca M mikeysmopars top fuel
mikeysmopars top fuel M Joined: Feb 2007 Posts: 1,608 fresno ca	A worn out sure grip shouldn't cause a vibration in my opinion even at speed but i have seen them chatter & try to lock up when turning if they didn't put in sure grip lube along with gear oil. If its an automatic a converter could be the culprit. Founder and CEO of the Central Valley Mopar Drag Pack

Re: 67 GTX that is bound and determin to be a vibrator [Re: mikeysmopars] #1325834 10/26/12 02:00 AM 10/26/12 02:00 AM
Joined: May 2004 Posts: 5,123 Warrenton, VA RoadRunnerJD master
RoadRunnerJD master Joined: May 2004 Posts: 5,123 Warrenton, VA	How can the convertor be the cause? I have a new Turbo Action convertor with 160 miles on it and the motor is internally balanced. Itfeelsluke a vibration in the rear end?

Re: 67 GTX that is bound and determin to be a vibrator [Re: RoadRunnerJD] #1325835 10/26/12 10:29 AM 10/26/12 10:29 AM
Joined: Mar 2009 Posts: 313 south central nebraska G GI Moparman OP enthusiast
GI Moparman OP enthusiast G Joined: Mar 2009 Posts: 313 south central nebraska	The GTX is a stripper version with column shift manual steering and brakes and coded for an open 3.23. We have even changed out the complete chunk with one from a low milage c body and same problem persist. We have considered the driveline angle but why would it change setting over the winter? Only reason i could come up with is leaf springs settled a little bit but seems unlikely. I really appriciate the replies here guys!

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325836 10/26/12 10:32 AM 10/26/12 10:32 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Could be as simple as a u-joint or an out of balance drive shaft or bad trans or engine mount, or even a tail shaft bearing in the trans.

Re: 67 GTX that is bound and determin to be a vibrator [Re: ScottSmith_Harms] #1325837 10/26/12 10:42 AM 10/26/12 10:42 AM
Joined: Mar 2009 Posts: 313 south central nebraska G GI Moparman OP enthusiast
GI Moparman OP enthusiast G Joined: Mar 2009 Posts: 313 south central nebraska	we have had drive shaft checked and balanced, new u joints, new tail shaft housiing bushing, all new mounts.

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325838 10/26/12 10:43 AM 10/26/12 10:43 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Ok, but "All New" doesn't always mean all good. you might want to double check.

Re: 67 GTX that is bound and determin to be a vibrator [Re: GI Moparman] #1325839 10/26/12 04:27 PM 10/26/12 04:27 PM
Joined: May 2004 Posts: 5,123 Warrenton, VA RoadRunnerJD master
RoadRunnerJD master Joined: May 2004 Posts: 5,123 Warrenton, VA	Quote: The GTX is a stripper version with column shift manual steering and brakes and coded for an open 3.23. We have even changed out the complete chunk with one from a low milage c body and same problem persist. We have considered the driveline angle but why would it change setting over the winter? Only reason i could come up with is leaf springs settled a little bit but seems unlikely. I really appriciate the replies here guys! I would change the U- joints

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