Guys, Thanks for all the replys. I asked the original question because I have 4.10's in my car now, but am going to change to 4.88's, and was wondering if nothing else was changed but the gears between dyno pulls, would the runs look different? Reading all this it looks like maybe yes, maybe not, but to just use it as a tool to get higher readings at the same dyno. If I have the extra coin to run it with the 4.10's first, then change, I will post what I find. Unfortuantly, I think I am only going to be able to do it after the 4.88's are installed, but now I am curious! Thanks again, Sean
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