I would like any suggestions posible...I own an '01 cobra and have installed 3.73 gears. I was told that if I install a chip I wouldn't have a problem with the gears. I haven't for about a year until my check engine light came on. The tech at Ford said it registered as an incorrect ratio in the rearend. The tech said he could fix the problem for $150. I thought the Diablo chip was supposed to eliminate the prob. The performance shops here said if Ford would will do it then go that route. I dont want to keep running into this prob. Please help! Thanks.