2004 DII drivetrain vibration mystery
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
Driveline shop Southern California
Powertrain Industries - Garden Grove :: Garden Grove, CA 92841 :: Products + Services
Powertrain Industries - Garden Grove :: Garden Grove, CA 92841 :: Products + Services
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
Ask to what RPM the drive shaft is balanced to.
Seems they can do 10,000 RPM at places..
Is driveshaft balance really necessary?
Seems they can do 10,000 RPM at places..
Is driveshaft balance really necessary?
YES! Driveshaft balance is necessary for smooth driveline operation and to eliminate the destructive effects that an unbalanced or poorly balanced driveshaft will have on your transmission and rear end. At Denny's Driveshafts we High Speed High RPM Balance every driveshaft to meet or exceed the top rpm requirements of your engine and transmission, especially in the case of an overdrive transmission where the driveshaft rpm is greater than the engine rpm in high gear. This is very important and should not be overlooked when purchasing a new driveshaft. We can balance and test to 10,000 rpm so whatever your requirements are we can meet them. This will ensure that you will have the smoothest ride at all road speeds and track speeds and also a quicker ET. You won't be limited by rear end gear ratio and you will experience smooth running especially when using an overdrive transmission. True high speed balance means balancing at a High RPM.
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Drifting
Joined: Jun 2010
Posts: 40
Likes: 0
From: Atlanta, GA
According to Tom Woods' website, they balance their shafts at 3400 RPM. If it's done properly and not damaged during shipping, this should provide a vibe-free drive at 75mph. I called the driveline shops around Atlanta and couldn't find anyone that spins over 3500RPM, so I'm curious aboutr lr2001silver's post. Can you give us more info about your company?
I have yet to hear of anyone not having a high speed vibration with a TW driveshaft.
But that does not mean it cant happen.
It is a heavy duty driveshaft, heavier parts are harder to balance.
You cannot balance a semi truck tire, its to heavy for example.
But that does not mean it cant happen.
It is a heavy duty driveshaft, heavier parts are harder to balance.
You cannot balance a semi truck tire, its to heavy for example.
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
I don't rock crawl with my D2 and I don't pull stumps out of the ground with it.
I have heard of D1 drive shafts breaking on off road events.
I don't know of any D2 people breaking drive shafts except for the
no grease drive shaft problems.
I would think a drive shaft made from good USA parts like SPICER or similar would be OK.
As long as the parts are not make in China knockoffs.
People making or rebuilding driveshafts should certify them balanced to 10,000 RPM or whatever by etching the cert into the shaft with a scribe pen or such.
Then at least you know what you got.
How to calc shaft RPM?
16/45 2.813 RPM's @ 75 mph = 5639 ...
Found the above..
Would think that the shaft is going more than 10,000 RPM at 75mph.
If our diffs are even 2.5:1
That is 5,600 RPM times 2.5
15,000 RPM of the drive shaft at 75mph
and
I have heard of D1 drive shafts breaking on off road events.
I don't know of any D2 people breaking drive shafts except for the
no grease drive shaft problems.
I would think a drive shaft made from good USA parts like SPICER or similar would be OK.
As long as the parts are not make in China knockoffs.
People making or rebuilding driveshafts should certify them balanced to 10,000 RPM or whatever by etching the cert into the shaft with a scribe pen or such.
Then at least you know what you got.
How to calc shaft RPM?
16/45 2.813 RPM's @ 75 mph = 5639 ...
Found the above..
Would think that the shaft is going more than 10,000 RPM at 75mph.
If our diffs are even 2.5:1
That is 5,600 RPM times 2.5
15,000 RPM of the drive shaft at 75mph
Formulas used
and
Thread Starter
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Drifting
Joined: Jun 2010
Posts: 40
Likes: 0
From: Atlanta, GA