Rear Gears - ZR-1 Net Registry Forums

Greybeard ZR1 · 09-29-2007

You really can't go wrong listening to Marc Haibeck. I've had 4.10 gears (dana) in my car for over ten years now and I concur with what he said.

To a large extent the decision depends on your driving style more than anything else. If, while driving with your stock gears, you rarely use 6th and find it lacking in power at your comfortable highway speed, like I did, then the 4.10 gears are for you. Fabulous mileage was not my priority when purchasing a ZR1.
When I bought my car, I thought the acceleration was good, but not great in 1st. and 2nd. So I put in the 4.10's.+ a lightweight flywheel. Wow, the improvement was very noticeable, and worthwhile. And now I can drop it in 6th and not feel like I'm driving a 4 cylinder car. 6th becomes a usable gear, still with great mileage.
I occasionally drag race, and I wish that I had 4.56's for that. With 4.10's you can easily run the 1/4 in 4th, but with 4.56's you could use the entire LT5 rev capability.
3.73, and 3.90 gears are usually recommended for big inch stroker ZR1's that have plenty of torque to get a great launch. I wouldn't bother with those "in between" gears for a stock, or stock displacement ZR1.

This gear question is the most common question for new ZR1 owners. And the biggest reason for that is our varying driving styles. As for myself, I'm always looking for an opportunity to nail it and listen to that great LT5 scream, but that approach is not for everyone.

09-29-2007	#1
Greybeard ZR1 Join Date: Jun 2005 Posts: 14	Re: Rear Gears You really can't go wrong listening to Marc Haibeck. I've had 4.10 gears (dana) in my car for over ten years now and I concur with what he said. To a large extent the decision depends on your driving style more than anything else. If, while driving with your stock gears, you rarely use 6th and find it lacking in power at your comfortable highway speed, like I did, then the 4.10 gears are for you. Fabulous mileage was not my priority when purchasing a ZR1. When I bought my car, I thought the acceleration was good, but not great in 1st. and 2nd. So I put in the 4.10's.+ a lightweight flywheel. Wow, the improvement was very noticeable, and worthwhile. And now I can drop it in 6th and not feel like I'm driving a 4 cylinder car. 6th becomes a usable gear, still with great mileage. I occasionally drag race, and I wish that I had 4.56's for that. With 4.10's you can easily run the 1/4 in 4th, but with 4.56's you could use the entire LT5 rev capability. 3.73, and 3.90 gears are usually recommended for big inch stroker ZR1's that have plenty of torque to get a great launch. I wouldn't bother with those "in between" gears for a stock, or stock displacement ZR1. This gear question is the most common question for new ZR1 owners. And the biggest reason for that is our varying driving styles. As for myself, I'm always looking for an opportunity to nail it and listen to that great LT5 scream, but that approach is not for everyone.