Driveline shudder/vibration at 40-45 mph
I have a 2009 SRT8 and I just mounted Michelin Latitude Tour HP in 275/40/R20 front and 315/35/R20 rear on the stock wheels. Now when i am cruising at 40-45 mph I get a momentary shudder/vibration that you can feel even through the seat. It will go away and then repeat, at a regular interval. Seems to only happen at this speed.
My concern is that the new tires introduced a rotational difference enough for the differential to try to activate. But the diameter difference is in spec with the stock sizes. Diameter is Front/Rear 29.1/29.0 for the goodyears and 28.7/28.6 for the michelins, both .1 inch off.
Anyone else experience this when going different tire sizes then stock? My car has 19k miles on it ( i have only put on 2k, bought at 17k) and i doubt it has ever had the fluids changed. I know in my EVO it needs to be changed every 15k or else you will get some shuddering/groaning when turning. But in the SRT i don't get that when turning, ONLY when driving straight between 40-45mph. All other speeds feel great.
Any Ideas??? Should I be worried?
I have done searches but can't find anything definitive, some say its an issue others not.......
Last edited by Heesh; 11-30-2011 at 06:28 PM.