4l60e vibration from cold start? any ideas
#1
4l60e vibration from cold start? any ideas
long story short I installed built 4l60e an yank 4k then my stock trans mount broke so I replaced with energy mount an couldn't stand the vibrations so I bought the umi torque arm relocation mount and installed new oem trans mount now the car rides smooth except for cold start.. I can feel in the floor at my feet a ruckus an vibration an a little noise hard to describe tho it lasts for 15 seconds then goes away.. its been doing this for the past month an hasn't gotten worse. im not sure if it was doing this when I had the energy mount in just because everything was shaking .. an im not sure if its from transmission or what.. if I cold start and put it in gear right away it still makes the noise an vibrations for a few seconds.. if I didn't post this in the right section please let me know
#2
after about 15 seconds the noise an vibration goes away and everything rides great and shifts great .. I looked underneath it doesn't look like the headers or exhaust is knocking anywhere
#6
TECH Addict
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Have you driven this in the winter yet?
I ask, because I have a weird vibration in the winter. Only in the winter. I have NEVER figured it out. I have changed I think, EVERYTHING. Engine, Transmission, Wheels, Axles, ALL mounts, Torque Converter, Drive line angles, Driveshaft.....
I ask, because I have a weird vibration in the winter. Only in the winter. I have NEVER figured it out. I have changed I think, EVERYTHING. Engine, Transmission, Wheels, Axles, ALL mounts, Torque Converter, Drive line angles, Driveshaft.....
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#11
Okay I took the car for a drive came home raise the rear end about 2 and 1/2 ft let it sit for 24 hours and I just started the car it still makes the noise so now my thought is to remove the Umi relocation mount and install my stock one to see if the vibration is still there
#12
Found the problem.. when I installed the new umi torque arm relocation mount.. the corner of it was touching my passenger side of my y pipe.. I trimmed it just enough to clear the y pipe started the car an no vibration. . Thanks guys for your help another problem fixed through ls1tech
#15
I am very happy that it wasn't the trans. Next I am going 5o unhook sway bar end links and see if I notice a difference on the street.. seems like some people say they notice it a whole lot an others didnt notice it at all.. I don't do auto cross an it's not my dd if I am hauling *** with the car is on a straightaway
#16
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I am very happy that it wasn't the trans. Next I am going 5o unhook sway bar end links and see if I notice a difference on the street.. seems like some people say they notice it a whole lot an others didnt notice it at all.. I don't do auto cross an it's not my dd if I am hauling *** with the car is on a straightaway
I mean the front comes up but it blows the tires off.
I do have to watch hi speed turns though.
The pizza cutters on the front don't help either.
Here's how they work at the track with drag radials.
Last edited by wht/73; 09-07-2017 at 06:49 AM.