vegiguy
New member
- Joined
- Sep 6, 2008
- Location
- Newton, Kansas
Being a manual NA car from the mid-80's I'm fairly confident my car has the 3.31 rear axle ratio so I don't think that would work with the .68 overdrive gear very well.Yep, they are absolutely fine with a 4.1-3.73 ratio
I think ideally you would want whatever rear axle ratio that allows the engine to turn at a good rpm for highway driving and four or five closely spaced gears, with the highest one being 1:1. An overdrive gear just bogs down the engine when you shift into it and doesn't let it accelerate very well so you end up having to shift down for passing, going up steep hills, etc., Plus when you have one in a transmission the rest of the gears get spaced out more so you're not as able to keep the engine running in its ideal power band. I doubt many top level race cars run overdrive gears.