Ive sold quite a few for around 125-150, usually between 10K-40K mi. but in perfect shape.

 

V6's are the same, most all are interchangeable from 93-02

 

I installed my LS1 Aluminum drive shaft while I still had a rubber trans mount. Vibrations decreased DRAMATICALLY from my stock steel unit.

Then after snapping the trans mount, I replaced it with a poly one, and got a LOT of vibrations.

This weekend, I rotated the drive shaft 180* on the pinion (disconnect, rotate the pinion 180* and reconnect) and all my vibrations are gone.

I'm left to assume that the rubber mount was soaking up all the vibrations, and the poly mount was just transferring everything right into the floor.

Doing this might have helped your problem, if you didn't try it before going with the Denny's.

 

I tried everything.... trust me on that one... the 180* trick, LS1 mount, Prothane Mount, ES Mount, Steel DS, etc....

I ended up gutting the drivetrain from the tranny back, New Denny's Nitrous Ready, Strange 12 Bolt, and all new suspension; no more vibs anywheres...

 

I just want to know if theres any real benifit to changing form my lt1 shaft to and ls1 shaft?

 

The LS1 shafts are balanced properly.

The LT1 shafts were plagued with being poorly balanced, leading to vibrations at speed.

 

what is the wieght of both and how much stronger is the steel than aluminum?

 

first off, i went to get my steel driveshaft balanced, and watched the guy do it... he put it on the machine and he showed me the needle... it was PERFECTLY balanced, even he was amazed by how balanced it was.. yet i still had a lot of vibrations around 75mph+

the new ls1 driveshaft turned the ride as smooth as butter at speeds past 120mph (i tested it last week)

i dont know why or how but all i know is there was a difference of NIGHT AND DAY.

the sleel shaft is like 16lbs and the ls1 alum. is like 11lbs i think, someone let me know if im wrong...

 

What RPM was he running the shaft at when he showed you that? I had my steel one balanced at 3K rpms, and it vibed like a **** at speeds above 75 MPH; when it was rebalanced at higher RPMS (Closer to 6K) the vibs lessened, but were still there.

GM is weak in their driveshaft design and manufacturer, especially the F-Body DSs. I talked with Denny of Denny's Driveshaft for over 2 hours when I picked mine up about the F-Body Driveshafts and stuff. Basically he can rarely get them to balance above 4-5K rpms, his NR shaft he can hold a balance to over 8K rpms depending on the application; Mine's balanced to about 7K.

 

Installed my LS1 Driveshaft today, took about 20 minutes. It was well worth the money. Alot smoother ride, the gear noise decreased and its incredibly smooth at highway speeds. before it felt like something was holding me back and rattling the car. thats completely gone now. LS1 DS

 

I installed my LS1 DS earlier this year. A few days later this happened... http://community.webshots.com/album/167097112FsQKxV It happened on the dyno at about 6k rpm. Might have been bent or something I dont know.

Tonight I installed my stocker that I had balanced last week. It cost me $30. Thats a whole lot less than an LS1 DS, and its stronger. Its nice and smooth now as well.

Point is, stock steel DS that is balanced > LS1 DS

 

I wonder if you can use a ford motorsports aluminum driveshaft if you change the yokes. I have sprayed off the line running 11'5 no problems, I even swaped into another of my stangs.

 

Warning - don't change the U-joints on an LS1 driveshaft unless they are wobbly or out of tolerance.

i bought a used LS1 driveshaft and had a shop change the u-joints cuz some genius there said it was really important to do it. there were putting in some other stuff so i said go ahead.

i shoulda just put it in myself because it started vibrating at anything over 70 in 6th w/ 3.73s. had to find a shop that could balance an alum driveshaft, and he said the new u-joints were good, but it was out of balance. he balanced it up to 4,000 rpm (their machine's max) but now i still get some vibration above 85mph in 6th, with i think is around 5,000+ rpm actual ds speed. so basically i'm still not happy.

i think i'll just go find another used on on ebay

 

Always take the word from board member's over some shop that you don't know and they say it's a good "idea".

 

Amen to that

theres been so many cases of mechanics and shops telling me the complete wrong info when i have 1000's of "mechanics" that specialize in my car right here on the board...

i was talkin about this w/ my friend today