Has anyone possibly done it.. I want a lower gear but want to make sure there are gains. Anyone running 4:56s if so whats your take on them... please and thanks

 

tire size is very important when choseing gears what tire size are you runing

 

275-45-20...

 

The real question is how much towing does your truck see? 4.56's are great gears especially if like me, your truck lacks in the bottom end. I see you have the 5.3 so that shouldn't be the case. They will add some good off the line acceleration however you may see a loss in the upper end. Also, the rpm's on the highway are a little ridiculous. At 70mph I'm turning 2650 on 30in tires. It's bad but if you have a muffler that drones. That **** gets old quick.

 

I don't tow at all... mainly street/strip and its a turd until about 25 even with 4:11s .. I most def want to get it up to speed faster but don't wanna lose much topend... and I don't do much highway whatsoever so that's not a issue. And I was hoping going lower would get it up to speed faster?

 

With a tire size of under 30”, I would stick with your 4.11’s and instead go with a torque converter to help in getting you off the line better, while still being able to somewhat cruise down the highway comfortably. I don’t see where you have one listed in your sig, so I really believe that should be your next target.

This is coming from someone with 4.56’s, but my tire height is right at 32”.

 

If all you want is acceleration then 1BEAR is right, a converter is the way to go. I suggest a 3000 stall. TB stall is also a good option. Just make sure you get a decent Trans Cooler with it. 4.56's will get you up to speed slightly quicker than 4.11's but no where near the improvement you'd see with a higher stall. Also I suggest a tune to go with it.

 

A good converter can easily drop you a half sec 1/4 mile. I don't think you'd see much if any gains from 4.10 to 4.56.

 

Performance gains would be small. However, I can tell you that when I used to take my truck up the Carolina Mountains on my way home with them 3.73's, there was a 27% load on my engine even though it dropped to 3rd. The last time I went home I had the 4.56's and the load in OD was only like 11%. Actually, even though I left it in OD, it never dropped a gear once. Small gears like that make your engine and trans' life just a little bit easier.

 

I'm gonna look into a 3200 stall... does the tranny cooler brand matter?