 ? Wobble, I'd list it if I knew what it was. |
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| nivekdodge |
 May 20 2025, 06:47 PM
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Member  Group: Members Posts: 306 Joined: 28-August 21 From: Pittsburgh Pa Member No.: 25,860 Region Association: MidAtlantic Region 
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I'm managing to get all the things I don't like handled and I'm quite happy with the car. I do still have a shake or shimmy but not a death wobble at 60mph. I've been searching for a good thread to follow rather than just throwing parts at it. The wheel shakes a little but also I seem to feel it in the seat. Still does it in neutral downhill.Seems to leave with a constant pressure as in a turn.
Wheels balanced, nothing out of ordinary. New turbo tie rods... Anyone document a chase? Thanks Kevin |
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| Superhawk996 |
May 20 2025, 07:10 PM
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914 Guru Group: Members Posts: 7,093 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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50-60 mph is almost always wheel / tire related. There is math behind why this is so but I’ll spare you the details.
1st suspect is balance - even when a shop says they are balanced - that doesn’t mean balanced to zero, just to within what ever their machine defaults to - usually 1/4 oz. Quality of balance often varies pretty drastically the skill or care of the tech doing the work. Someone may have balanced them and said they were OK. I’d have someone else double check that. 2nd would be the wheels and mounting. Rear wheels on the 914 are not hub centric. This becomes a problem if lugs are not tightened carefully and really is not fully resolved without going to hub centric adapters. 3rd suspect is tire uniformity. Google it. Short version - tires are not perfectly round nor does the tire carcass have a uniform deflection as it rotates against the road. Uniformity varies enormously across various brands of tires as well as within a brand depending on the tire construction and often depending on which plant it was made in. See video which includes description of tire uniformity. I’d first start by moving rear tires to the front while carefully mounting the rears carefully (cross torque, in multiple increments). Does that improve or degrade? After that I’d have the wheels/tires measured for uniformity by a shop that has a road force balancer (preferably a Hunter). It will cost you. But if you have a uniformity issue - this is your best chance at compensating it. https://www.youtube.com/watch?v=4OvcOX74wh0?si=AKL6EHHVCgqPbOnO |
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Posts in this topic
nivekdodge ? Wobble May 20 2025, 06:47 PM
L-Jet914 Have you checked wheel bearing play? Lower ball jo... May 20 2025, 06:53 PM
ClayPerrine
Flat spotted tires can do the same.
Been there... May 20 2025, 08:31 PM dtmehall question:
doesn't it depend on the type of th... May 20 2025, 08:35 PM Cairo94507 I completely agree with having a reputable shop, o... May 21 2025, 10:32 AM rhodyguy Remove the center caps yourself prior to any wheel... May 21 2025, 10:59 AM randyt914 if the tire and rims are truly balanced (2nd opini... May 21 2025, 01:00 PM StarBear Chased the same problem at the same speed for seve... May 21 2025, 01:44 PM nivekdodge Swapped frt to back, Better, not perfect, but diff... May 21 2025, 07:35 PM mgp4591 Have you checked for any tire separation? Even a s... May 21 2025, 08:22 PM |
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