projekt70chevelle

iTrader: (4)

I've been thinking about doin this for a while, but lately my high speed vibration has gotten worse and worse. I was wondering if you have to get a transmission specific shaft (auto/manual), and if i can use the same u joints from my stock one since i recently replaced them. How much do these normally run and do i need to get a used one balanced? Just wondering but exactly how much lighter are they?

little Red Camaro

iTrader: (14)

I did the swap, and all the vibration at high speed went away. Car pulls harder to me since I put the LS1 drive shaft in. Also droped my RPM's by 200 at 75 mph. All the drive shafts are the same, mine came out of a M6 car and mine is A4. And yes you can use your u joints. I got mine free from a friend that for some reason was collecting them, long story...but you can find them for 75-150. I wouldn't think it would need balancing unless you notice some damage on it.

transamws6_97

iTrader: (5)

You can get any ls1 driveshaft and it will work and your U-joints will work if you wanna put them in. I got mine for 100 bucks and all ls1 driveshafts are already balanced. The aluminum one will be lighter and I suggest that over the steel ls1 driveshaft. All m6 came w/ aluminum and all autos w/ 3.23 came w/ aluminum while 2.73 autos came w/ steel. Remember dropping lbs of rotational mass make even more of a difference something like ever 1 lb of rotational mass is like dropping 10 lbs regularly.

Shouldn't have driveshaft wont change your rpm since its just a direct link from your tranny to your rear. I think either your guages are off or it's in your head because it shouldnt drop your rpm

projekt70chevelle

iTrader: (4)

What changes when you set it up for a 12bolt? Can you still use it for the stock 10bolt with no modifications?

HoLLo

iTrader: (17)

been thinking about a LS1 alum driveshaft swap myself..

z28hustle

i have one sitting around but i havent done it yet..

nicks2ndz

iTrader: (13)

removed all my 75+ mph vibration and i could really feel the vibrations after the chassis mount TA

Stroked96Bowtie

iTrader: (22)

I have one of the aluminum LS1 shafts on the way. When it gets here its getting new ujoints and will be balanced...sending it through the mail has to throw off the balance.

I'll keep the steel shaft handy though incase the aluminum one gives

letsrun97z

iTrader: (7)

i got mine off ebay for 150 it was even polished lol took it out of the box and put it on no problems alltho it did seem a lil faster the first couple days. i think that was just all in my head

Burrhos

iTrader: (3)

I tried installing a buddies aluminum DS out of his '01 Z28 and his Ujoint did not fit in my stock rear end. I then tried to use my Ujoint from the old steel DS and the inner and outer diameters were different.

Am I missing something? I thought, from everything I've read here, that it's a direct swap..my car is stock but maybe, my buddies had a different rear end in his. Which Ujoint do I need for it to work? Any help is GREATLY appreciated!

Also, Happy Thanksgiving to all!!

porksoda

iTrader: (39)

It should bolt directly in...mine did.

Burrhos

iTrader: (3)

It didn't. The ujoint did not fit in my stock rear end grooves. I messed with it for about 20 mins as did my mechanic partner.. Which ujoint do I need to order for it to work?

LT1Falcon

iTrader: (3)

i hope you were joking about this. why would shipping it in a box effect its balance?

CamaroRacing12

iTrader: (5)

i was wondering the same exact thing

95zpro

[QUOTE=Stroked96Bowtie;8116159]I have one of the aluminum LS1 shafts on the way. When it gets here its getting new ujoints and will be balanced...sending it through the mail has to throw off the balance.

I'm guessing he was talking about the shipping company probably dropping it or laying something heavy on top of it etc. But like someone said earlier a visually inspection could possibly point out any obvious defects.

P.S. sorry for the hijacked thread.

Chevy053

Whoever had the driveshaft before you may have had a 12 bolt which uses a slightly bigger ujoint. Just go out and get a stock replacement style ujoint and put it in.

I had this problem when I bought mine used from someone.

LT1Falcon

iTrader: (3)

[QUOTE=95zpro;8171867]maybe, but you would have to drop a driveshaft pretty darn hard to get it out of balance. think of the abuse it takes in the car. short of actually bending it or knocking a weight off it seams near impossible

Ls1Bait

Im looking for a alluminum drive shaft also. What is the weight diffrence between steel and alluminum.

96lt1m6

iTrader: (31)

i think it is in the neighborhood of 5-8 lbs of reciprocating mass.
i knew i would feel a difference since i did all my Tpi cars back in the day this car would not be any different.the car seems to accelerate much smoother,besides it cost me nothing

speed_demon24

iTrader: (6)

LS1 driveshafts and 12 bolt's aren't a good idea. LS1 driveshafts are pretty weak so chances are you will shread it on a hard launch.