[DeTomaso] (no subject)

[sean mundy]

It's probably not the drivetrain.  If I'm on the freeway and feeling the vibration at 2500rpm and 60mph I can push the clutch in and the motor goes to idle at 1000rpm.  The vibration is totally gone even though I'm still rolling free at 60mph down the road.   So I think that eliminates any concerns with the drivetrain?   
 


From: MikeLDrew at aol.com
Date: Fri, 27 Aug 2010 20:13:44 -0400
Subject: Re: [DeTomaso] (no subject)
To: seanmundy at hotmail.com; detomaso at realbig.com

Sean,

One more datapoint.

John Christian had a rumble in his rear that simply confounded him, and Asa Jay, and me, and several professional tire shop technicians, for a full day.  New tires, alignment, driveshafts, etc. etc.

It turned out that he had a rear wheel bearing, that had a tight spot.  It would tighten up once per revolution.  We finally figured it out by jacking the rear of the car off the ground, and running it up to 80 mph or so in 5th gear, then putting it in neutral and chasing the wocka wocka wocka sound with a mechanic's stethoscope.

This is obviously a job best done with assistants, i.e. somebody behind the wheel and ready to assume both feet on the brake at any moment.  The car was supported on two jackstands and a floor jack and the front wheels were chocked, but still, you can't be too careful.

Mike