lt1 flywheel
Thread Starter
Teching In
Joined: Jul 2009
Posts: 8
Likes: 0
lt1 flywheel i have a vibration that feels like it is in my trans. T56. i pulled out the trans. and was looking at the clutch and flywheel. i was under the impression that the lt1 motor was a enternaly balanced motor which would make the flywheel 0 or neutral balanced but my flywheel has a small weight on it. so my question is is it ballanced with the wieight or with out the weight and then the weight is put on? and what is the weight for. thanks
On my next clutch, I plan on replacing the flywheel since this one has been turned at least 3 times.
So if if I buy a brand new LT1 flywheel from shop a,b or c. Will it have the same weight correction as my original one? Or does the original one have to be analyzed and then the new once corrected to match the original?
I dont understand how one can properly balance a flywheel without taking into account the rotating assembly.
So if if I buy a brand new LT1 flywheel from shop a,b or c. Will it have the same weight correction as my original one? Or does the original one have to be analyzed and then the new once corrected to match the original?
I dont understand how one can properly balance a flywheel without taking into account the rotating assembly.
The only vibe I have is in 5th and 6thgear (mostly 6th) at 85MPH+. Rest of the gears and regardless of RPM or speed are smooth as silk. I dont see how that can be flywheel related but I cant rule it out.
Trending Topics
The first thing that comes to mind on your year is an unbalanced driveshaft. There was a TSB on it a decade ago.
If you have the stock shaft, I'd bet money on it being the problem.
The tranny is easy to diagnose - At 85 mph, when it vibrates, put it in neutral. If it stops, it's in the tranny (but I don't think it is).
If it's not the flywheel (which if it was resurfaced it could be) it's the DS.
Also, no chance a weight fell off one of your wheels, right?
If you have the stock shaft, I'd bet money on it being the problem.
The tranny is easy to diagnose - At 85 mph, when it vibrates, put it in neutral. If it stops, it's in the tranny (but I don't think it is).
If it's not the flywheel (which if it was resurfaced it could be) it's the DS.
Also, no chance a weight fell off one of your wheels, right?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo The first thing that comes to mind on your year is an unbalanced driveshaft. There was a TSB on it a decade ago.
If you have the stock shaft, I'd bet money on it being the problem.
The tranny is easy to diagnose - At 85 mph, when it vibrates, put it in neutral. If it stops, it's in the tranny (but I don't think it is).
If it's not the flywheel (which if it was resurfaced it could be) it's the DS.
Also, no chance a weight fell off one of your wheels, right?
If you have the stock shaft, I'd bet money on it being the problem.
The tranny is easy to diagnose - At 85 mph, when it vibrates, put it in neutral. If it stops, it's in the tranny (but I don't think it is).
If it's not the flywheel (which if it was resurfaced it could be) it's the DS.
Also, no chance a weight fell off one of your wheels, right?
Drive 85, clutch it or go to neutral = smooth as silk so that rules out DS or angles. I agree its the tranny and I believe its the 5/6 driven gear on the back of the mainshaft that has history of loosening up and causing my problem. Going to tackle that in the winter.
exactly high mph trust me i just had this fixed it vibrates everything including ur transmission and shifter right and ur peddles , its ur flywheel its been cut to many times , its buttery smooth till u hit 75 and on its gets so rough u have to take the car out of gear, all that rubble isnt good for ur motor ,
Thread Starter
Teching In
Joined: Jul 2009
Posts: 8
Likes: 0
i do not know, i have only had the ride for a week, it is a 1997 z28. i looked at everything with it out of the car and nothing seems to be wrong, i put a straight edge on the flywheel and it seems level or staight or not warped. i do know the flywheel is not factory and the pressure plate is, not sure about the clutch.
Thread Starter
Teching In
Joined: Jul 2009
Posts: 8
Likes: 0
so if i have it balanced would they balance it with or with out the weight, or is it even worth having one checked? thats kind of strange, the way they are ballanced, you would think it would play hell on the crank, but i guess that is why i am not a GM engineer.
Alex,
So if I understand you correctly, yours vibrated only above 75MPH regardless of gear. Correct?
Under 75, regardless of gear or RPM, it did NOT vibrate? Correct?
Did it vibrate at all sitting still and just revving the motor?
So if I understand you correctly, yours vibrated only above 75MPH regardless of gear. Correct?
Under 75, regardless of gear or RPM, it did NOT vibrate? Correct?
Did it vibrate at all sitting still and just revving the motor?
Call me asap 8184330718 yea below 70 it would not vibrate whether it be in nutral 1,2,3,4,but if I started getting close to 65-etc it has a vibration big vibration. Call me it will take a min to explain
His doesn't vibrate because of high rpm or mph exceeding 70 its as soon as he puts it in 6th . He could go 110 in 5th no vibration, he puts It in 6th vibration. He could go 60 in 6th vibration occurs. Its his tranny its still stock and he's pushing 450rwhp and a 9in rear end. Stock trannys can't Handel all that and he also has 4.10s . Spoke to him on the phone and that is what we came up with. Really great guy
Just to clarify, right at 400RWHP. Heavy vibes in 6th above 85, shift to 5th at 85 just a tad vibe, shift to 4th at 85 no vibe. I can drive 100 in 4th and there will be no vibe. No vibes in 1st through 4th regardless of RPM or speed.