Under $4k budget build LA360 build

John Collins said

I’ll look into it all of this. Thank you for the advice. My only problem is highway driving with 3.91’s. I’ll have to weigh the pros and cons on that. I was already thinking about moving up to 3.55’s... I need to reread your reply a couple times and do some research. Lol

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I can't answer your question WRT rear end ratios based on an AT, however I can shed a little light on those ratios running an A833 4 speed. I drove from Chicago to Tulsa spinning 3.91's and while we were trying to keep it around 60-65, I really had no issues with running out of rpm with that diff. On the return trip I was spinning 3.55's and it seemed a little more relaxed. I guess it depends on how much highway driving you intend to do. Not sure I would want to spin a 3.91 at 70-80 mph for any extended period of time, but for my current build, I don't intend to. You may have totally different expectations from your build and trans.