what are the advantages of regearing?

thinking about of getting an Eaton E-locker, but I'm wondering if I should change the gear ratio to 4.10 gears. opinions please!!

 

More power through rpms. IMO 33s and 3.73s are pretty good together with a 4.0

 

The general consensus is that if you get bigger tires, then you should get appropriate gears to bring your engine back to the proper power band. Larger tires are harder to turn, thus demand more power from your engine. Getting the appropriate gears make it easier to turn the rear wheels, thus balancing you back to close-to-stock as far as engine power goes. Also if you get bigger tires, and then get the right size gears, you will get your speedometer back to accurate as well.

Bigger tires are harder to turn

Taller gears make it easier to turn

 

thanks guys

 

have to say that was the best simple explanation I've seen of that subject.

thanks

 

on point.

 

Nice explination.... but what will regearing do to my MPG? right now with my 33's im still getting 18.... pretty happy with that but with the stockers i was getting 20..

 

Depends on the Tacoma. Automatic transmission Tacoma trucks use the wheel speed sensors for the speedometer. Manual transmission Tacoma trucks use the speed sensor at the transfer case (drive shaft) for the speedometer.

It varies. You state that you are getting 18 now, but how is that calculated? If you went with bigger tires, and are going by miles based on your speedometer, then your calculations are inaccurate. Gotta start there.

In a PERFECT world, if you go with say 10% larger tires, then 10% taller gears, then you would get the same mileage. We are not in a perfect world, so factors such as having a higher ground clearance, which will affect downforce, as well as aerodynamics, you will lose some mileage.

 

I get 14.8 mpg with 37's and 4.88 gears. I also drive harder than most, but the point is it will probably get a little worse if you are turning higher RPM's at the same speed. I could improve my mileage if I actually used 6th gear, but I run the highway in 4th on hills and 5th on the flats cranking 2500+ rpms most of the time.

 

Here's something to help too:

http://www.tacomaworld.com/forum/performance-tuning/155144-true-speed-after-regear-formula.html

 

Sorry to revive an old thread, but are there benefits to regearing if you're towing? I have added more weight to my truck (camper shell, full steel skids, rock sliders, roof rack and camper shell rack) and run 265/75/16 Duratracs E Load. I noticed that my RPMs were running a little higher (2300) while towing on the last trip out, and I was thinking of getting lighter wheels or going back to 245/70/16s for tire size. But, if regearing could help bring down the RPMs while towing, I might consider this route.

Thanks!