Jamie Loftin Posted March 9, 2014 Report Share Posted March 9, 2014 I have a 2001 sts and I am having a rough shaky ride once I get over 55mph. Not sure what is causing the problem. Replaced control arms and outer tie rods as well as tires. Any suggestions or advise? Thanks Link to comment Share on other sites More sharing options...
Cadillac Jim Posted March 9, 2014 Report Share Posted March 9, 2014 It sounds like your suspension is not tightening up as your speed increases. Try running your OBD codes and see if any RSS DTCs come up. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted March 9, 2014 Report Share Posted March 9, 2014 Generally a vibration at higher speeds that gets worse as speed increases is either suspension out if alignment or wheels / tires out of balance. In my opinion, that era STS chassis is somewhat sensitive to wheel/tire imbalance. Have the alignment set. Ask your dealer or tire shop to balance the tires. If no improvement, look for a road-force balance service. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
airmike Posted March 9, 2014 Report Share Posted March 9, 2014 I would skip straight to the road force balance. I had my sts balanced once and later road force, made a LOT of difference. I think it was $37 at my GM dealer. It would drive smooth most of the time under 65, or over 80, but never at 70. Link to comment Share on other sites More sharing options...
Jamie Loftin Posted March 9, 2014 Author Report Share Posted March 9, 2014 Thanks for the info I will try the road force Link to comment Share on other sites More sharing options...
barczy01 Posted March 16, 2014 Report Share Posted March 16, 2014 check your outer tie rods Link to comment Share on other sites More sharing options...
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