the1andonlyGR81
Dedicated LVC Member
is anybody running steeper gears with stock driveshaft? im getting a 93 found one cheap, butv was wondering how many changed the rear and not driveshaft?
gears
- Thread starter the1andonlyGR81
- Start date
mossbergman
Dedicated LVC Member
me. damn thing vibrates at 80<
98lincmk7lsc
Dedicated LVC Member
I have a 93 shaft with my 4.10's.
chris2523
93 Mark VIII
me too.
mossbergman
Dedicated LVC Member
Chris I like your new sig pic
slowmkviii
Dedicated LVC Member
chris2523
93 Mark VIII
KStromberg
Dedicated LVC Member
You should consider getting it "HIGH SPEED BALANCED" That should help some.
the1andonlyGR81
Dedicated LVC Member
chris, your sig pic is great. im gonna get a 93 shaft, i found one, anyone who drives like i do needs it anyways, but i used to drive around at 90-100 (around 3000 rpm) and never had vibration probs.
NetKeym
Dedicated LVC Member
It's funny you bring that up. I have a 93 Mark VIII shaft in my Bird, and it vibrates above 80-85. With the stock driveshaft, it was smooth up to the speed limiter I figure I'll just get another one, have it balanced, then swap them out.
chris2523
93 Mark VIII
have you tried clocking it? rotating the driveshaft where it bolts to the differential. sometimes that cuts down on vibrations.
and my driveshaft does vibrate around 100 mph. not below 95, not above 105. but in between, its pretty bad. i rarely go that fast so i don't worry about it. fine up to 80.
NetKeym
Dedicated LVC Member
No, every time I get 'er on a lift, I forget to do that...
Outlaw94
Active LVC Member
Was gonna put a 93 shaft in mine this past sunday while swapping the rear end out.I just put a 97 LSC rear in mine(94),not a big jump in gears but it is noticeable and does pull harder and barely have to give it gas to stay at speed.Well worth the $65 bucks.When taking the rear gas tank bolts out they started to feel like they would break.Are the gas tank bolts still available?. Getting the driveshaft "HIGH SPEED BALANCED" sounds like a good idea.
Paid $30 for the shaft $65 for the rear end..gotta love Pick n pull
Paid $30 for the shaft $65 for the rear end..gotta love Pick n pull
the1andonlyGR81
Dedicated LVC Member
my main reason is just strength not vibration. i dont want to be going down the 1/4 and shift into 2nd at WOT and have the shaft snap.i drive like that light to light anyways. i just feel more comfy with a solid piece i have an idea why they did it, for smoother shifts because i forgot how a stock viii shifts since i had it tuned, when they rebuilt my tranny a few months ago they did the shift kit and it went into gear quicker but it was still soft and smooth until i increased the line pressure then it was neck snapping with the stock 3.27's.
98lincmk7lsc
Dedicated LVC Member
Good luck getting the driveshaft to snap...
NetKeym
Dedicated LVC Member
mikeskustomfab
Well-Known LVC Member
ive got 3.73s with the stock 95 shaft and it rides smooth as can be at 125
NetKeym
Dedicated LVC Member
Yeh, like I said mine was smooth as silk too with the stock shaft - I'm thinking that's why they put the rubber isolator in the shaft in the first place! :shifty:
slowmkviii
Dedicated LVC Member
Talking to my drive line shop thay have seen the rubber isolators fail so the one shaft would just spin in the other but they were not sure if the mark shaft was built the same.
NetKeym
Dedicated LVC Member
They look the same as the Bird/Coug drivershafts except they are aluminum instead of steel (except the 1993 ones, of course).
KStromberg
Dedicated LVC Member
Yes. The 2-piece design did have a rubber isolator. Once it fails, I'm sure a driveline shop would have a hell of a time trying to balance it.