Steering issue at highway speeds - 6SpeedOnline - Porsche Forum and Luxury Car Resource

996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.
Sponsored by:

Steering issue at highway speeds

 
  #1  
Old 08-31-2010, 08:00 PM
Registered User
Thread Starter
Join Date: Aug 2010
Location: San Francisco, CA
Posts: 4
Rep Power: 0
PoHunDr is on a distinguished road
Steering issue at highway speeds

I'm new to the list & wanted to get peoples' opinions re: a steering issue I am experiencing in my recently acquired 2002 996TT. The steering feels light and has a tendency to wander after 50mph. No issues at lower speeds. I initially thought this may be due to the tires but the problem persisted after I replaced them. Any ideas? Thanks!
 
  #2  
Old 08-31-2010, 08:13 PM
Registered User
Join Date: Jan 2009
Posts: 2,241
Rep Power: 158
raineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond reputeraineycd has a reputation beyond repute
Originally Posted by PoHunDr View Post
I'm new to the list & wanted to get peoples' opinions re: a steering issue I am experiencing in my recently acquired 2002 996TT. The steering feels light and has a tendency to wander after 50mph. No issues at lower speeds. I initially thought this may be due to the tires but the problem persisted after I replaced them. Any ideas? Thanks!
Could be a few things. Be sure your air pressure is set to factory settings 36F 44R - on the gas filler lid.

If you have aftermarket coilovers, may be the camber. Or could be the toe setting.

If tire pressure is good, have the alignment checked.
 
  #3  
Old 08-31-2010, 09:14 PM
Registered User
Join Date: May 2010
Location: Seattle
Posts: 104
Rep Power: 20
Mgib is a splendid one to beholdMgib is a splendid one to beholdMgib is a splendid one to beholdMgib is a splendid one to beholdMgib is a splendid one to beholdMgib is a splendid one to beholdMgib is a splendid one to behold
AS above. Confirming tire pressure(my guy suggests 40psi for the rear, ymmv) followed by a GOOD alignment. An alignment shop who knows Porsches. With your garage collection, you should know a good shop. Mine is stable as a rock to 120.
 
  #4  
Old 09-01-2010, 12:41 AM
911xpress's Avatar
Registered User
Join Date: Jun 2008
Location: SF Bay area
Posts: 1,078
Rep Power: 76
911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute
Seems like what I was experiencing on my 2002. I checked the tires, had the car aligned at the dealer and still felt the same - almost scary above 80mph and lots of wandering on 280 with grooved pavement. Car would 'bounce' over bumps on Skyline (35) when going thru corners at 45mph +. I was very disheartened regarding the handling after having the car two months as something just didn't seem right.

This summer I finally got things ironed out.

1) I wasn't familiar with driving a rear engine car.

2) The front end of a 911 is light and in stock condition the car is raised too high. The front end 'floats at high speeds and can feel unnerving when you are not used to it.

3) My stock suspension was shot at 48K miles. I replaced it with some PSS9's, sway bars and proper alignment and had it lowered a bit.

Hope this helps....
 
  #5  
Old 09-01-2010, 11:23 PM
Registered User
Join Date: Aug 2010
Location: US
Posts: 89
Rep Power: 12
eglivincent will become famous soon enough
my 996TT seems super solid at 100+
 
  #6  
Old 09-02-2010, 09:01 AM
bsprad's Avatar
Registered User
Join Date: Jun 2010
Location: Maryland
Posts: 151
Rep Power: 15
bsprad is on a distinguished road
I had a very similar feeling when I first bought my 996tt. There was some floating or wandering above 75mph that was a little unnerving, and I have PSS9's.. I decided to have a good, vision-based, 4 wheel alignment. My shop also recommended a mild outward toe for a sharper turn-in. The results were fantastic. The car is now absolutely solid at every speed, or at least as fast as I've had it.
 
  #7  
Old 09-02-2010, 09:08 AM
FAST FWD's Avatar
Registered User
Join Date: Dec 2007
Location: Indiana
Posts: 1,158
Rep Power: 105
FAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond reputeFAST FWD has a reputation beyond repute
+1 to bsprad. I toe mine out 1/32" (total) and that makes the front end very stable. I was at Road America last weekend, where there were frequent excursions to 150 mph. Solid and stable, also on PSS9's.

Jon
 
  #8  
Old 09-03-2010, 12:33 AM
Registered User
Thread Starter
Join Date: Aug 2010
Location: San Francisco, CA
Posts: 4
Rep Power: 0
PoHunDr is on a distinguished road
Thanks for all the feedback. I had the alignment done today but haven't had a chance to take it out on a freeway. I'll find out tomorrow morning...

997xpress--280 is part of my daily commute and that is exactly where I feel the car wandering.
 
  #9  
Old 09-03-2010, 01:39 AM
ard
ard is offline
Registered User
Join Date: Jan 2007
Location: N. California
Posts: 2,981
Rep Power: 291
ard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond reputeard has a reputation beyond repute
Originally Posted by PoHunDr View Post
Thanks for all the feedback. I had the alignment done today but haven't had a chance to take it out on a freeway. I'll find out tomorrow morning...

997xpress--280 is part of my daily commute and that is exactly where I feel the car wandering.
What were the pre and post alignment numbers? Did the shop give you the print out?

Just taking it to a shop and saying 'align it' will not always work..even a Porsche dealership... they just slap it on the machine and if it is somewhere within spec you are told "fine".

GL

A

PS CHP just loves 280 as well....
 
  #10  
Old 09-03-2010, 01:10 PM
911xpress's Avatar
Registered User
Join Date: Jun 2008
Location: SF Bay area
Posts: 1,078
Rep Power: 76
911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute911xpress has a reputation beyond repute
Exactly - That's what I did first at the local P dealer. Even took the Service rep for a ride. They aligned the car to factory specs and it made no difference whatsoever.

https://www.6speedonline.com/forums/...-galore-2.html

Read my Post #20 that shows specific alignment data....


Originally Posted by ard View Post
What were the pre and post alignment numbers? Did the shop give you the print out?

Just taking it to a shop and saying 'align it' will not always work..even a Porsche dealership... they just slap it on the machine and if it is somewhere within spec you are told "fine".

GL

A

PS CHP just loves 280 as well....
 
  #11  
Old 09-03-2010, 01:45 PM
av2
av2 is offline
Registered User
Join Date: Oct 2006
Posts: 141
Rep Power: 0
av2 is infamous around these parts
I am suspecting too much toe out could cause the nervousness. Worn bushings and links can cause play in the suspension while driving.
 
  #12  
Old 09-08-2010, 04:01 PM
Registered User
Thread Starter
Join Date: Aug 2010
Location: San Francisco, CA
Posts: 4
Rep Power: 0
PoHunDr is on a distinguished road
I learned the lesson that ard pointed out in his post. The car still pulls to the right and the condition is even a little worse now--there is now a slight vibration at highway speeds. I had the wheels balanced to make sure that this wasn't the problem. At this point, I plan on taking the car to a Porsche dealership as it came with a balance of an extended warranty. I suspect there is a steering or suspension problem, both of which may be covered under warranty (depending on the problem).

PS
The CHP does love 280..especially the closed vista points!
 
  #13  
Old 05-23-2014, 05:24 PM
Registered User
Join Date: May 2014
Location: Pennsylvania
Posts: 32
Rep Power: 6
athena1111 is on a distinguished road
Same Problem

Hello, Have you had any luck correcting your loose front end issue? I have on '01 Turbo with the same issue, I'm trying to figure it out.
 
  #14  
Old 05-23-2014, 09:11 PM
nick49's Avatar
Registered User
Join Date: May 2010
Location: Utah
Posts: 1,019
Rep Power: 97
nick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond reputenick49 has a reputation beyond repute
You need more toe in.

If you want a quick and dirty way to verify this loosen the jamb nut on your front tie rods and turn each side in a quarter turn, tighten and go for a ride. It should make a noticeable difference for the better.
 
  #15  
Old 05-23-2014, 10:01 PM
'02996ttx50's Avatar
Registered User
Join Date: May 2009
Location: la
Posts: 7,657
Rep Power: 569
'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute
wtf does "wander" mean, anyway. i mean relative to a 996t. i surely ramble, but my car sure don't wander

 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Steering issue at highway speeds


Join 6SpeedOnline
Visit our Sponsors

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.