Discussion Forum - Northstar Chevelle Club

jim larson · 2K+ Club

Drive Shaft Balance Recommendation?

bowtie · Secretary

We use Proven Force in Maple Grove at wok, They also did the chop/cut/rebuild on mine for the Chevelle.

SShink · 3K+ Club

Jim, somewhere closer to you is Wheelco in Newport (basically St. Paul). I took mine there at the recommendation of Master Trans, and it turned out great with a 24 hour turnaround.

Wheelco

47 21st St., Newport, MN

They re-tubed and installed new u-joints on mine for $229.

I highly reccommend them.

dashboard · 2K+ Club

SShink wrote:
Jim, somewhere closer to you is Wheelco in Newport (basically St. Paul). I took mine there at the recommendation of Master Trans, and it turned out great with a 24 hour turnaround.
Wheelco
47 21st St., Newport, MN
They re-tubed and installed new u-joints on mine for $229.
I highly reccommend them.

Wheelco did one for me also. Good folks to deal with good service, quick turn around. Does your driveshaft have the rubber shock absorber inside it?

Bowtieman427 · Active Member

check this out
You asked about what RPM they spin it to balance. In my case it was custom to application and I went through the calculations below

www.driveshaftshop.com/driveshafts-101

I went through the same calculations with Denny's when my driveshaft was built. They like to balance at different points once the critical speed calculation is completed. Once you have the critical speed share that with the balancer and take it from there.

We will need to know the following:

1.HP/Torque of the motor
2.Transmission
3.Rear ratio
4.Rear tire size and height
5.Top MPH the car will see
6.Weight of the car with driver
To check for critical speed, calculate this equation:

Top speed x 336 (a constant) x rear ratio (like 4.10), then divide it by the tire height (28” tall tire).

Here is an example:

Top speed is 160mph x 336 = 53760 x rear ratio of 4.10 = 220416, then divide this number by the tire height, 28”. This car would have top RPM of 7872. Now the shaft being designed will need to be able to so this RPM.

more ambition than brains · 1K+ Club

Wheelco did the Biscayne shaft, solved my vibration, done real quick!
Karl

jim larson · 2K+ Club

Thanks for the information guys. I changed the pinion flange and seal because of oil leakage problems. I had the driveshaft balanced back in 2005 along with new u-joints and a front yoke at Catco in Rochester. Just thought maybe I should have it rebalanced, no real vibrations, and who knows the if what I t hink I feel is due to tire, wheels, balancing of tires, or brake drums.