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Author Topic: 68 Z motor mounts  (Read 9137 times)

68Zproject

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68 Z motor mounts
« on: February 25, 2008, 01:29:10 AM »
I'm confused again after reading some posts on the MM issue with 68's and 69's.  I have the original frame mounts on my 68 Z28.  I have a '70 CE 302 in it.  The engine mounts that came off it said made in China so I got the engine mounts at Rick's for the original frame mounts (EP89).  Is this the right set up for this combo or do I need to get different engine mounts?  I've got a lot of vibration over 70mph that is speed related and not RPM.  I've turned the u-joints around to no avail.  Thanks.
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68Z28

Gramps69Z

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Re: 68 Z motor mounts
« Reply #1 on: February 25, 2008, 01:55:19 AM »
Did the virbration start after changing the motor mounts?  A high speed virbration sounds more like a wheel, tire balance problem to me.
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Captain John Wykoff
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68Zproject

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Re: 68 Z motor mounts
« Reply #2 on: February 25, 2008, 04:10:22 AM »
No, the engine was rebuilt so I didn't go too fast until I got some miles on it.  It could be all the above, its just really vibrates in the transmission area.  I just want to make sure I have the right set up for the motor mounts.  After reading posts and the info CRG has about the incorrect engine mounts causing vibration etc., I wanted to rule this out and then go to the driveline.
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68Z28

firstgenaddict

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Re: 68 Z motor mounts
« Reply #3 on: February 26, 2008, 10:31:04 PM »
Sounds like the tailshaft bushing in the trans... if that is what you determine it to be... take the trans out... I did it in the car... next to impossible...
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James
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68Zproject

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Re: 68 Z motor mounts
« Reply #4 on: February 28, 2008, 02:36:19 AM »
Tranny inside is all new.  Still wondering if I have the correct motor mounts.
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68Z28

68Zproject

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Re: 68 Z motor mounts
« Reply #5 on: March 05, 2008, 01:30:12 AM »
Does anyone know if the EP-89 part number motor mounts at Rick's, are correct for 68 Z with original frame stands?
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68Z28

68Zproject

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Re: 68 Z motor mounts
« Reply #6 on: April 21, 2008, 04:56:14 PM »
It was the driveline out of balance.  I changed the yoke and that threw it out big time.  I got it balanced and took it up to 90 with no vibrations.
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68Z28
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