- Jun 19, 2011
- 13
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What's up everyone I'm a new member to this site with a question. I installed 4.10s in my 03 GT over a month ago and I noticed after I broke them in and did some serious driving with them that from 3k Rpms and up I get a vibration that progressively gets worse. Never had this problem with my 3.27s and the car has 130k on it. My question is could the stock driveshaft be over spinning with the new gears meeting it's, I guess you could call it, rotational breaking point? This problem didn't exist till the new gear swap. Thanks in advance for any help.