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04-03-2004, 08:09 PM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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Not Ranked
Grinding noise when hit bumps
Guys,
I hear a grinding noise and also feel vibrations in the shift handle when I hit a dip in the road. It is a definate metalic grinding that feels like it is coming from the transmission.
I remove the safety loop and the noise is still there.
I have looked every where under the car and can't see any place where parts are rubbning.
Here is my set up
EM
351 W
Tremec 3350
Ford 8.8
any ideas?
__________________
Roger
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04-03-2004, 08:44 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Roger: Check to see if the rear tires, the wheels, or rotors are rubbing on something at full bump. Also check the eBrake cable and related parts.
Rick
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 04-03-2004 at 09:02 PM..
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04-03-2004, 09:43 PM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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Thanks Rick
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Roger
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04-03-2004, 11:16 PM
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CC Member
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Join Date: Jan 2003
Location: mpls, mn,
Posts: 43
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Rbray, I would check for binding in your driveshaft, maybe the angle is off during bounce. just a thought.
Dave
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04-04-2004, 01:29 AM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Just another thought, if driveshaft is too long it may be jaming into transmission tailhousing at full bump????
Grasping at straws????
Rick
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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04-04-2004, 09:58 AM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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Thanks for the suggestions.
My next move is to pull the drive shaft and look for wear marks.
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Roger
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04-07-2004, 08:53 AM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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I found where the noise is coming from. I pulled the driveshaft and the front u-joint is binding.
I have a few options:
I can change the pinion angle which is a major pain.
or I could put a shim under the transmission mount to change the angle.
It also ocurred to me that my transmission mount maybe flexing too much when I hit bumps. Is there such a thing as a solid transmission mount?
Let me know what you think
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Roger
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04-07-2004, 09:22 AM
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CC Member
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Join Date: Dec 2001
Location: Castalia,
Oh
Cobra Make, Engine: EM cobra, 450 inch sbc running a best ET of 9.14..so far..ALL MOTOR...approx 800 horse.............ERA with 482 FE..All Aluminum Engine
Posts: 1,395
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There are solid tranny mounts and also poly mounts....I use the poly mounts on the engine and tranny
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Jack
XSSIVE .....
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04-07-2004, 10:31 AM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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Jack,
Thanks for the input. I just got off the phone with Summit and I ordered a poly mount. The tech guy advised me not to go with a solid mount unless I changed the motor mounts to solid as well, ohter wise I would wreck my drive train.
Thanks again
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Roger
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04-07-2004, 10:36 AM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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I had to install upper adjustable links to adjust my pinion angle. Solved my problem. 9" 4 link live axle.
Don't know what kind of rear you have.
Roscoe
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Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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04-07-2004, 12:42 PM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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Roscoe,
I have a Ford 8.8 live axle. It has adjustable control arms, but I'm hoping that the poly mount will take care of the problem. If not I will adjust the arms.
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Roger
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04-09-2004, 05:11 PM
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CC Member
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Join Date: Jul 2001
Location: Southwest,
WI
Cobra Make, Engine: Shell Valley, Mopar thingy (small block of course)
Posts: 2,215
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My tranny cross memeber used to twist up all the time. Caused all kinds of havoc on the driveline.
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Brent Dolphin
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04-11-2004, 07:46 PM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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Not Ranked
I put a quarter inch shim under the transmission mount today.
Problem solved.
Thanks everyone
__________________
Roger
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