Schumacher engine mount vibration
#1184758
02/23/12 01:54 PM
02/23/12 01:54 PM
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Joined: Aug 2003
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redex79
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I'm have some vibration problems with a 71 E body. A hemi was installed in place of the original 383 using Schumacher mounts. Still has the original K member using Schumacher mounts. Replaced the trans mount with the original material sytle, had the drive shaft checked and balanced. Tryed two complete sets of tires and wheels. Still having a vibration while driving at lower speeds untill around 70 mph. Vibration is not as bad but still noticable. I'm wondering if there might be a issue with the engine mounts. Has anyone had vibration problems like this ?
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Re: Schumacher engine mount vibration
[Re: Kern Dog]
#1184760
02/23/12 03:02 PM
02/23/12 03:02 PM
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redex79
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That is a thought or could be a internal transmission problem.
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Re: Schumacher engine mount vibration
[Re: dm69charger]
#1184762
02/23/12 07:12 PM
02/23/12 07:12 PM
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redex79
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More noticeable in the front.
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Re: Schumacher engine mount vibration
[Re: redex79]
#1184764
02/23/12 07:56 PM
02/23/12 07:56 PM
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Joined: Dec 2007
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DAYCLONA
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There could be a possibility that the mounts may have changed your driveline angle,....procure an inclination meter, measure the degree/angle of the oilpan lip, find a parallel centerline of the transmission to measure from, as well as the rear pinion centerline, you'd like to see the engine/transmission, and the rear pinion exhibiting the same/parallel angles with each other, and the driveshaft deflected at an opposite angle of 2 degrees approx,...
I'll post a pic tonight
Mike
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Re: Schumacher engine mount vibration
[Re: DAYCLONA]
#1184765
02/23/12 08:05 PM
02/23/12 08:05 PM
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Joined: Sep 2003
Posts: 1,236 Fairview Tennessee
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i was having the same problem with a 65 dodge a990 clone i built for a guy, i tried everything 3 times, pinion angle up,down,2 and 4 degree's, new driveshaft balanced and rebalalanced, axles checked, wheels and tires, pulled the trans twice and had direct drive drum changed, called schumacher, prayed a couple of times, i could go on, still doing the same thing, it finally broke me and i gave up, the owner is suppose to be taking it to oceanside driveline to see if they can figure it out .
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Re: Schumacher engine mount vibration
[Re: Moonraker]
#1184767
02/23/12 08:44 PM
02/23/12 08:44 PM
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Posts: 4,916 new berlin wisconsin
Mr T2U
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you might try to loosen up the mounts. lift the motor up a bit. shake the motor to reposition it a bit. then drop it back down and re-tighten everything.
perception is 90% of reality
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Re: Schumacher engine mount vibration
[Re: Moonraker]
#1184768
02/23/12 09:20 PM
02/23/12 09:20 PM
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Joined: Nov 2007
Posts: 21,819 Kirkland, Washington
Pacnorthcuda
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Quote:
I had both engine and tranny mounts from Schumacher and had vibrations transmitted through the body like crazy. Changed out the engine mounts and that helped a little then changed the tranny mount back to rubber and the vibrations pretty much went away. It has nothing to do with Schumacher really just the poly mounts in general seem to transmit vibrations more. This is also kind of hit and miss as some guys get those vibrations with poly...some dont. In my case poly was the issue. If it were me I would start with the mounts first and then move onto other things mentioned in the posts above.
I also had it happen after installing two Schumacher poly locs. Started up the car and didn't even drive it. The Steering wheel just BUZZED in my hands. Replaced the passenger side mount with stock--90% of the vibration was gone-I am happy.
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Re: Schumacher engine mount vibration
[Re: Pacnorthcuda]
#1184769
02/23/12 11:10 PM
02/23/12 11:10 PM
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redex79
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well, looks like there might be a k member change coming.
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Re: Schumacher engine mount vibration
[Re: ThermoQuad]
#1184772
02/25/12 02:19 PM
02/25/12 02:19 PM
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redex79
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There you go! A voice of experience. I was wondering about that after looking at the mounts. So, here I go, on the look for a K member. Thanks, Tom_Quad
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Re: Schumacher engine mount vibration
[Re: ThermoQuad]
#1184773
02/25/12 06:42 PM
02/25/12 06:42 PM
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Quote:
STOP!!!!!!!!!!!!!!!! you are wasting your time, I have been down this road before. The mounts create a geometry issue that the only cure is a hemi k frame.
can you elaborate?
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Re: Schumacher engine mount vibration
[Re: redex79]
#1184774
02/25/12 11:29 PM
02/25/12 11:29 PM
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Posts: 543 Indiana, Just Off I-70
BradD
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Polyurethane is much denser than rubber. The Schumacher hemi to b kmember mounts have small diameter bushings which will not cushion the vibrations especially with more cam in a motor. We found the Schumacher mounts also raise the motor higher than stock which changes the driveline angle. Add a Poly trans mount and you amplify the vibrations more. I run rubber mounts whenever I can on street cars!
Brad
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