^^ +1 Could be the tires acting up last summer prior to buying my 968 I took the car on severals runs before going in for a PPI LOL sound like it needed wheels bearings a new tranny & cvs turn out the owner had driven with 22 psi instead of 34 -36 psi in them for quiet a while the guy didn't even check his tires let peoples who did service the car take care of that, turn out they weren't better them him ruin a set of perfect & very expensive tires in no time, the car was also sitting weeks at the time in the garage without being move around witch din't help any propably flat spotted the tires at the same time,migth not be your problem but I'll suspect the tires first.
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83-944 show room -sold___New ride 93-968 with SC steering wheel-ROW signal ligths- Susp M030 mods lowered,Porsche VA springs- Adjustable struts - Bilstein inserts - Bilstein sport rear -LSD -riding on Cup 1 wheels 17x8 frt 17x9.5 rear road contact Falken 452/ 225-45 ZR Front 255-40 ZR Rear -- Motor Mods /chip /K&N / mod air boxe just love the handling & power