The final drive ratios of the Alero and GA are the same. The only one that is different is the GA GT. Final drive ratios are identical between the Alero and GA SE. I don't really see this as the problem. I had only regular bolt ons and a shift plus on my car. After about six months of using the shift plus in conjunction with the other mods, I started having problems with my tranny. I think it is just a hit and miss thing.
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