Driveshaft?

[scupking]

I'm going to be putting on an FRPP aluminum drive shaft in a few days. I have an automatic, now if I remember correctly I need to use my yoke from my current D/S right?

 

[Nightstick]

I'm going to be putting on an FRPP aluminum drive shaft in a few days. I have an automatic, now if I remember correctly I need to use my yoke from my current D/S right?

Yep. Was gonna do that myself but decided on one of these instead:

http://www.need-4-speed.com/pst.htm

 

[fobra559]

I'm going to be putting on an FRPP aluminum drive shaft in a few days. I have an automatic, now if I remember correctly I need to use my yoke from my current D/S right?

Correct. Car should feel smoother after the install. Mine seemed to rev a little smoother and faster with the new DS.

 

[scupking]

Correct. Car should feel smoother after the install. Mine seemed to rev a little smoother and faster with the new DS.

Yeah I'm looking forward to that. After the gear change I noticed some vibrations.

 

[scupking]

Yep. Was gonna do that myself but decided on one of these instead:

http://www.need-4-speed.com/pst.htm

I paid just over $200 for the aluminum. I did look at the ones your talking about but they are so expensive.

 

[CobraRed_96_GT]

Yep. Was gonna do that myself but decided on one of these instead:

http://www.need-4-speed.com/pst.htm

hmmm cams with valve springs or a new driveshaft.................

 

[fobra559]

hmmm cams with valve springs or a new driveshaft.................

Good Point.

 

[Notchbck93]

Yeah I'm looking forward to that. After the gear change I noticed some vibrations.

Between the yolk on your rear pinion and the yoke on the back of the tranny you should have a 1 degree difference. If not, shim the back of the tranny and your vibration should be gone.

http://www.drivetrain.com/driveline_angle_problem.html

You've increased the speed of your driveshaft by changing the rear gear ratio; adjust accordingly.

 

[joshheat25]

Yea my car was alot smoother with the new driveshaft and new rear tranny mount, seal, bearings. huge difference. Going 70-80 on the hwy it's so much smoother!

 

[geoffsgt]

You've increased the speed of your driveshaft by changing the rear gear ratio; adjust accordingly.

Eh? D/S still moves at the same speed... engine speed modified by whatever gear you happen to be in.

 

[CobraRed_96_GT]

Eh? D/S still moves at the same speed... engine speed modified by whatever gear you happen to be in.

shhhh, logic isn't welcome here

 

[Flghtmstr1]

Eh? D/S still moves at the same speed... engine speed modified by whatever gear you happen to be in.

I'm not so sure that's the best way to look at it. For the same vehicle speed, the driveshaft will be spinning faster in a car with a higher (numerical) rear gear ratio. So, on average, your driveshaft will be turning faster after a gear install (unless your driving slows down to compensate)

 

[CobraRed_96_GT]

I'm not so sure that's the best way to look at it. For the same vehicle speed, the driveshaft will be spinning faster in a car with a higher (numerical) rear gear ratio. So, on average, your driveshaft will be turning faster after a gear install (unless your driving slows down to compensate)

edit: i had it backwards. going 60mph with 3.27's the wheel is spinning at 60 mph and engine may be at X rpms. 60mph w/ 4.10's means wheel is still spinning at 60mph but the engine is at 1.2X rpms therefore the driveshaft is having to spin faster to go the same speed