US3S Dodge Stealth and Mitsubishi 3000GT Forum


| Official Members List | Join US3S | News & Information| Sponsor List | US3S Stuff | 3S of the Month |

 

Go Back   US3S Dodge Stealth and Mitsubishi 3000GT Forum > Modifications > Twin Turbo

Twin Turbo 91-96 Stealth RT/TT 91-99 3000GT VR-4 / VR-4 Spyder

Reply
 
Thread Tools
  #1  
Old - September 8th, 2012, 09:35 PM
TBoxdorfer TBoxdorfer is offline
Member
 
Join Date: Jun 2012
Location: Perryville, Mo
Posts: 92
Driveshaft vibration

Iv recently done a VR4 conversion on my 95 SL. All is well except a vibration that starts around 75. Its definitely driveshaft and not tire or axle vibration. While driving it on a lift it feels to be coming from the rear. The local machine shop will balance for $90. But when driving the donor car it did not have the vibration. There is no signs of where a balance weight fell off that I can see. Is there any ideas you can share before I send it off to get balanced?
__________________
95 SL/VR-4
Reply With Quote
  #2  
Old - September 9th, 2012, 06:17 AM
checkered vr4's Avatar
checkered vr4 checkered vr4 is offline
slipnsidways
 
Join Date: Jun 2009
Location: Bartonville IL
Posts: 827
Re: Driveshaft vibration

Unbolt the flange at the rear diff and rotate the driveshaft 90 degrees and see if the vibration stops.
__________________
Reply With Quote
  #3  
Old - September 9th, 2012, 07:05 AM
TBoxdorfer TBoxdorfer is offline
Member
 
Join Date: Jun 2012
Location: Perryville, Mo
Posts: 92
Re: Driveshaft vibration

Tried that already. Vibration stayed the same
__________________
95 SL/VR-4
Reply With Quote
  #4  
Old - September 9th, 2012, 10:15 AM
checkered vr4's Avatar
checkered vr4 checkered vr4 is offline
slipnsidways
 
Join Date: Jun 2009
Location: Bartonville IL
Posts: 827
Re: Driveshaft vibration

Check for play at the t- case and u-joints and pinion bearing. Rear diff mounts could also allow too much movement.
__________________
Reply With Quote
  #5  
Old - September 9th, 2012, 10:34 AM
TBoxdorfer TBoxdorfer is offline
Member
 
Join Date: Jun 2012
Location: Perryville, Mo
Posts: 92
Re: Driveshaft vibration

Checked all joints and play in transfer case. Pinion bearing is good. But the only location I changed 90 degree is at the rear diff. I indexed the shaft so it is on exactly the same way I removed it from the donor car. Should I try turning the 2 shaft halves 90?
__________________
95 SL/VR-4
Reply With Quote
  #6  
Old - September 9th, 2012, 05:31 PM
checkered vr4's Avatar
checkered vr4 checkered vr4 is offline
slipnsidways
 
Join Date: Jun 2009
Location: Bartonville IL
Posts: 827
Re: Driveshaft vibration

I would try that too but I think they would be balanced individually. Did you separate them moving them over to this car?
__________________
Reply With Quote
  #7  
Old - September 9th, 2012, 05:41 PM
whitedragon's Avatar
whitedragon whitedragon is offline
WWVD
Bounceback Champion, Bugz Champion, Jason's Pong Champion, Mosquito Kill Champion, Mouse Race Champion
 
Join Date: Sep 2005
Location: STL - TREE - S
Posts: 6,773
Re: Driveshaft vibration

How do you know it's not tire or axle related? Could be wheel related to, or warped rotors or something.
Reply With Quote
  #8  
Old - September 9th, 2012, 07:35 PM
TBoxdorfer TBoxdorfer is offline
Member
 
Join Date: Jun 2012
Location: Perryville, Mo
Posts: 92
Re: Driveshaft vibration

I did seperate all pieces of the driveshaft but also indexed them so I know for a fact they are in the same bolt holes as they were removed.
I know it's drive line due to the type of vibration. I used to work at a tire shop and a tire/ axle vibration is once per wheel revolution. This is more like a rumble, like 3x per wheel revolution.
__________________
95 SL/VR-4
Reply With Quote
  #9  
Old - September 9th, 2012, 07:37 PM
TBoxdorfer TBoxdorfer is offline
Member
 
Join Date: Jun 2012
Location: Perryville, Mo
Posts: 92
Re: Driveshaft vibration

Answer I was hopin to get was, how often has anyone balanced the driveshafts? Is it common for them to acquire a vibration after extended removal time. Could bending the joints cause this to start?
__________________
95 SL/VR-4
Reply With Quote
  #10  
Old - September 9th, 2012, 08:15 PM
checkered vr4's Avatar
checkered vr4 checkered vr4 is offline
slipnsidways
 
Join Date: Jun 2009
Location: Bartonville IL
Posts: 827
Re: Driveshaft vibration

Maybe you need to lube the cunooter valve? It could be sticking on you.
Does it happen at a specific speed or rpm? I would pull the t-case and drive shaft and drive it before I paid a shop to balance a 3 piece shaft.
__________________
Reply With Quote
  #11  
Old - September 10th, 2012, 11:29 AM
TBoxdorfer TBoxdorfer is offline
Member
 
Join Date: Jun 2012
Location: Perryville, Mo
Posts: 92
Re: Driveshaft vibration

RPM, no. Speed, yes. Above 75 MPH. Vibration is the same regardless of gear. I'll try runnin it on the lift without the DS. I'll keep everyone posted
__________________
95 SL/VR-4
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 08:33 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Content Copyright United Society of 3000GT and Stealth Owners where applicable. The Dodge Ram logo, Dodge, Stealth and R/T are trademarks of the Chrysler Corporation. The Three Diamond logo, 3000GT, VR-4, VR4, and (GTO in Japan) are trademarks of Mitsubishi Corporation. GTO is a trademark of Pontiac which is part of the General Motors Corporation. 3Si may be a trademark of 3000GT / Stealth International. Use of these logos and trademarks does not indicate approval of content or affiliation with these companies by US3S. US3S content is copyright US3S where it is not already copyrighted by someone else. US3S is not responsible for incorrect or inaccurate information.Ad Management plugin by RedTyger