smokin sierra

iTrader: (1)

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

6789olds

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

smokin sierra

iTrader: (1)

275-45-20...

usmc3521

iTrader: (2)

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.

smokin sierra

iTrader: (1)

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?

1Bear

iTrader: (1)

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”.

usmc3521

iTrader: (2)

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.

Rhino79

iTrader: (7)

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.

usmc3521

iTrader: (2)

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.

smokin sierra

iTrader: (1)

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