I have the 80-100mph vibe and cant fix it. Where should i go in MI?
- Thread starter wals9331
- Start date
I had the vibe from around 100 - 120 bad. I installed the maximum Motorsport irs MMIRSB-40 diff mount. The mount lowers the rear of the differential and raises the front. I was able to match the pinion angle to the drive line angle exactly. The viberation was completely eliminated.
I have the rear diff lowering kit installed and could only get the diff angled up at 2 degrees. I guess I am going to try to change the angle of the engine/trans 1 degree t match....
This!:thumbsup:
This :thumbsup:
And this :thumbsup:
If all of the above does not work I would seriously think about a 3.73 gear set.
Why would 4.10's cause a vibration and not 3.73's or 3.55's?
Not sure...but everyone keeps saying it.
I am getting my driveshaft balanced tonight, and am going to "Neutalize" my driveline angle Saturday. "Neutralizing" your driveline angle makes you loosen all the engine and tranny mount bolts, and driving your car 4ft forward and backward. I am hoping to get 1 degree out of that :shrug:.
how are the wheels balanced?static or static and dynamic...
are they stock rims?
have you changed rotors?
what happens if you lightly lift parking brake handle
when at say 120mph...what happens when you lift off gas to float?
what happens when you go into neutral...
does vib change if you put in neutral and rev up tp 5k..
than the change in gears could play a roll in driveshaft flex
are they stock rims?
have you changed rotors?
what happens if you lightly lift parking brake handle
when at say 120mph...what happens when you lift off gas to float?
what happens when you go into neutral...
does vib change if you put in neutral and rev up tp 5k..
than the change in gears could play a roll in driveshaft flex
Shaft speeds are higher relative to the vehicle speeds.
Any harmonics or vibrations present will be magnified proportionally by the higher speeds.
how are the wheels balanced?static or static and dynamic...
are they stock rims?
Not stock, and I I am not sure how they were balanced. Vibe only appeared once I did all the rear end work...
have you changed rotors?
what happens if you lightly lift parking brake handle
Nope, havent touched them.
when at say 120mph...what happens when you lift off gas to float?
Vibration gets a little bit better but is still there...really bad under load though...
what happens when you go into neutral...
Vibration gets a little bit better but is still there...really bad under load though...
does vib change if you put in neutral and rev up tp 5k..
Nope...only when I am driving fast
than the change in gears could play a roll in driveshaft flex
Thats what i am thinking...
I am still off 1 degree on my pinion angle so I am going to try and fix that Sat...and i am supposed to have my aluminum driveshaft balanced by then as well...
are they stock rims?
Not stock, and I I am not sure how they were balanced. Vibe only appeared once I did all the rear end work...
have you changed rotors?
what happens if you lightly lift parking brake handle
Nope, havent touched them.
when at say 120mph...what happens when you lift off gas to float?
Vibration gets a little bit better but is still there...really bad under load though...
what happens when you go into neutral...
Vibration gets a little bit better but is still there...really bad under load though...
does vib change if you put in neutral and rev up tp 5k..
Nope...only when I am driving fast
than the change in gears could play a roll in driveshaft flex
Thats what i am thinking...
I am still off 1 degree on my pinion angle so I am going to try and fix that Sat...and i am supposed to have my aluminum driveshaft balanced by then as well...
your in a hard spot...i had some issues back after going to 373`s.
ok bash me...we didnt follow all the steps..i have gear whine and had pinion noise.long story short..i had changed the pinion flange and 99% went away...gear whine is still there
my viberated real bad from 70mph and up..on or off gas..but you could float into a sweet spot and it was somewhat ok..
our speed limits here were just raised..70-75-80 depending what road your on
i just now ordered a new trans mount,,mine is broke..i feel alot more vibs thru car with just this being loose...i will have it next week,,i will
post what i felt in changes..
ok bash me...we didnt follow all the steps..i have gear whine and had pinion noise.long story short..i had changed the pinion flange and 99% went away...gear whine is still there
my viberated real bad from 70mph and up..on or off gas..but you could float into a sweet spot and it was somewhat ok..
our speed limits here were just raised..70-75-80 depending what road your on
i just now ordered a new trans mount,,mine is broke..i feel alot more vibs thru car with just this being loose...i will have it next week,,i will
post what i felt in changes..
Last edited:
I was getting vibrations really bad at 80+ mph.
Turns out that one of my rear wheel hub was bad.
Changed it.
But only some of the vibration went away. I was still getting a little.
Then i installed some MM Sub Frame Connectors and BAM!
It's gone.
Turns out that one of my rear wheel hub was bad.
Changed it.
But only some of the vibration went away. I was still getting a little.
Then i installed some MM Sub Frame Connectors and BAM!
It's gone.
thats what i was thinking but wasnt sure if it was that simple. I have 4.30's and i have a slight vibration. guess it could be the gears. I plan on putting in 3.55's anyway.
thanks for the info.
I have the subfram connectors ready to be put in....but planned on doing that when I got a dyno tune....but I dont think i can do the dyno tune until after i get the vibe fixed....
I am in one hell of a pickle :uh oh:
Are these vibes that you guys are getting starting out as a whooowhoooowhoooo noise and then turning into a vibe?!?!
mine sounds like a school bus rear,,howl when floating,,
than a highpitch whine when on throttle
rear brake drag was a quick thought i had on yours because of the speed your getting vib...a drive line vib will come in at 30 mph than go away at around 60...
but there is just a vib,vib in ass,or teeth rattle out of your mouth type ,,that would be like windows rattling..
i made driveshafts for a living when living in nj...just you switching driveshaft around is a balance issue,,,if ujoint is to tight it will tighten more when hot,,,like thats why we got rid of ubolt style yokes,,,dumb stuff will get you every time
The vibe starts rattling your teeth out at 120mph.
I just got my aluminum driveshaft balanced...Im planning on trying it out tomorrow. Ill let you guys know...
I had a bad vibe, broke my input shat, replaced it with another 10 spline and the vibe was completely gone. I think that maybe I bent the input shaft a small amount and that was causing my issue. I am running 4:10s which make vib issues worse IMO.
It has less then 1k miles on it...
Put the newly balanced driveshaft in and it works great! I am getting a dyno tune done June 2nd at Alternative Auto!
Users who are viewing this thread
