Nasty Vibration

[Mike Voth]

Originally Posted by RPinoski1

Might have lost a wheel weight or two???????

New tires last weekend at Denver. Balanced with no change. Thanks

[chris tinberg]

Hey mike when we first got the cavalier done we had a terrible vibration in the steering from the 1000 ft on ,we checked everything, to make a long story short we had a bad set of front tires how we found this out jason took them to a tire shop in north kcmo that balances big tires like for FWD trucks it is different than conventional spin balancers it has wheel of some sort that spins on the outside of the tire and thats how we found out the tire wasn't round from now on we always take them there to get mounted and balanced . this might not be your problem but keep that in mind for the future ,don't trust the track balancers were you buy your tires we had both front and rears checked and they told us they were ok ! good luck chris

[Mike Voth]

Originally Posted by chris tinberg

Hey mike when we first got the cavalier done we had a terrible vibration in the steering from the 1000 ft on ,we checked everything, to make a long story short we had a bad set of front tires how we found this out jason took them to a tire shop in north kcmo that balances big tires like for FWD trucks it is different than conventional spin balancers it has wheel of some sort that spins on the outside of the tire and thats how we found out the tire wasn't round from now on we always take them there to get mounted and balanced . this might not be your problem but keep that in mind for the future ,don't trust the track balancers were you buy your tires we had both front and rears checked and they told us they were ok ! good luck chris

Thanks, Chris. Even on stands, the vibration is horrible. On visual inspection, the rears don't seem to be out of balance, ie. not hopping or bouncing. I think it has to be in the driveline somewhere, but I also think we need to balance the tires once, as you mentioned. It definately wouldn't hurt and might make the ride more smooth.

Thanks again for the suggestion. Why weren't you guys at Denver?

[Ed Carpenter]

Mike find out anything yet? No im not coming to Tulsa. Considering going to the 3 races in 3 days S/SS combo at Belle Rose next month. Ed

[Mike Voth]

Got the clutch and pressure plate back yesterday. The pressure plate was out of balance by 38 grams!! We all know that these cintered iron setups warp from all the sliding, but does that usually make them out of balance?? Nothing was missing from the pressure plate, and the disc is still in one piece. Anyone ever have this issue?? The tranmission is still coming apart, hopefully tonight, but 38 grams is a TON spinning at 9000 RPM

Any other thoughts??

[Adger Smith]

Mike,
I'm sure thay told you 38 grams, but to really tell how much out it is the actual correction radius needs to be known... 38 G. 2 in from center is not nearly as much as 38 g. 8 in from center..... Still 38 G is a big number for any correction radius.
That could have knocked a little extra clearance in a few other vital parts. Rear bushing and Pilot bearing as well as all bearings in the tranny come to mind..
good luck

[Mike Voth]

The "lug" was welded just past center, more towards the outside of the hat than the inside. There was a small one on the opposite side that was cut off to balance properly. Something doesn't add up...without breaking a finger, etc., how can a pressure plate be that far out of balance?

The mainshaft appears straight, but we'll know later today for sure when we get it back from the machine shop.