aluminum driveshaft

[hsean]

my car is an 87 mustang and i bought an aluminum driveshaft for it a while back looking to install this and was wondering which way the yellow sticker goes up or down?the rear end isn't original to the car so i am trying to do this without getting the vibration that people complain about.my car has eibach springs will this be a problem?

 

[gearheadboy]

 

[hsean]

i installed my aluminum driveshaft i know that it has to go on a certain way there is a yellow round sticker on it .it is the size of a silver dollar i know that there are notches that you are supposed to line up so that you don't end up with vibration my question since the rear end is not original to the car and i don't have the notches to guide me does this sticker matter whether it is located up or down when mounting the drive shaft?

 

[gearheadboy]

With the risk of sounding like an azz, the shaft spins. What is top today may be bottom tomorrow. Put the shaft in the car. If it vibrates take the bolts out and turn it 180 degrees and bolt it back up.

 

[jrichker]

There should be a yellow paint mark on the pinion shaft flange Line the yellow marks up as closely as possible.

 

[Noobz347]

I know of no aluminum off the shelf drive shaft that is balanced to anything other than zero.

In other words: It doesn't matter how it's clocked when it's installed.

 

[gearheadboy]

I have ran into a few shafts over my career that have caused a vibration when installed. Meaning when there was no vibration beforehand. When pulled and moved 180 degrees the problem was always corrected.

 

[Shakerhood]

As Jrichker mentioned above there is a crayon mark on the Companion Flange, you line the dot on the driveshaft up with it.

 

[flyinhigh90]

u dont have to worry about a vibration with aluminum it balances it self out thats why it dosent have any weights like ur stock one does.

 

[f8tlfiveo]

u dont have to worry about a vibration with aluminum it balances it self out thats why it dosent have any weights like ur stock one does.

How does this happen? I'm interested in this answer.

 

[David Pepiton]

How does this happen? I'm interested in this answer.

its simple it uses the force because its a jedi.

 

[Noobz347]

I have ran into a few shafts over my career that have caused a vibration when installed. Meaning when there was no vibration beforehand. When pulled and moved 180 degrees the problem was always corrected.

I've run into this problem with OEM style steel shafts. I may have just been lucky with the aluminum but haven't had any shake, rattle, and roll incidents with aluminum.

u dont have to worry about a vibration with aluminum it balances it self out thats why it dosent have any weights like ur stock one does.

How does this happen? I'm interested in this answer.

I'd like to know this as well. Never heard of anything that balances itself. Would love to encorporate this technology into wheels and rotating assemblies.

 

[MFE92]

It absolutely does need to be lined up, and imbalance is only half the story. Runout is the other. The driveshafts are marked so that their points of imbalance and runout complement the runout point on the pinion flange, which is marked at the factory with a white/yellow paint dab.

If you want to learn more than you ever thought possible, look no further than this, written by a Ford driveline engineer

http://www.tccoa.com/articles/tranny/transmission/page17.shtml

 

[Noobz347]

It absolutely does need to be lined up, and imbalance is only half the story. Runout is the other. The driveshafts are marked so that their points of imbalance and runout complement the runout point on the pinion flange, which is marked at the factory with a white/yellow paint dab.

If you want to learn more than you ever thought possible, look no further than this, written by a Ford driveline engineer

http://www.tccoa.com/articles/tranny/transmission/page17.shtml

That's what I love about this place... Someone always has "THE" answer.

 

[hsean]

its simple it uses the force because its a jedi.

lol

 

[hsean]

thanks for the help guys i ended up bolting it on and when i get this running hopefully will not be an issue.

 

[flyinhigh90]

I bolted mine up no prob I didn't line anything up

 

[gearheadboy]

The pinion flange, if marked (I've been working in the field every day since 1990 and have maybe seen 2 pinion flanges marked), could have been replaced or removed to re seal and reinstalled at any index point. There is generally no blind spline. And the while the propshaft is marked for the heavy side and does have run out, it should be within the tolerances that the manufacturer provides. I would be much more worried about the pinion angle change from lowering the car or the frequency shift from changing gear ratio and tire size. The indexing is irrelevant.

 

[hsean]

The pinion flange, if marked (I've been working in the field every day since 1990 and have maybe seen 2 pinion flanges marked), could have been replaced or removed to re seal and reinstalled at any index point. There is generally no blind spline. And the while the propshaft is marked for the heavy side and does have run out, it should be within the tolerances that the manufacturer provides. I would be much more worried about the pinion angle change from lowering the car or the frequency shift from changing gear ratio and tire size. The indexing is irrelevant.

yeah i am swapping out my 2.73 for 3.55 and stock 17x9 cobra wheels

 

[Shakerhood]

The pinion flange, if marked (I've been working in the field every day since 1990 and have maybe seen 2 pinion flanges marked), could have been replaced or removed to re seal and reinstalled at any index point. There is generally no blind spline. And the while the propshaft is marked for the heavy side and does have run out, it should be within the tolerances that the manufacturer provides. I would be much more worried about the pinion angle change from lowering the car or the frequency shift from changing gear ratio and tire size. The indexing is irrelevant.

Mine was marked from the Factory as it shows in the Ford Service Manual.