NateC

I've tried my best to do my due diligence prior to starting a new thread about this by reading all the other posts I could find...

When my current 275/65/R18 (~32in) tires need replacing, I'm looking at replacing them with 275/70/R18s (~33in). I have a 2010 5.4L FX4 with 3.73 gears. Should I regear? I'm not planning on going any bigger than 33s ever (from reading other posts it seems like with 35s it is pretty clear that one should regear (although obviously there are folks that haven't without problems). That said, I want to take good care of my truck and don't want to put a lot of unnecessary strain on the transmission/components.

Thanks!

rdkev

no.. you definitely do not need to re gear.

rdkev

Just for reference... I did no gearing changes.

F-250,LD

No.
You will loose some towing ability (the engine will work a little harder). You will notice very little power loss.

csharp01

Why would you think you would need to change your gear ratio? For a 1 inch overall diameter change? That's roughly the difference between new tires and worn out tires. Minimal in my opinion.

RES4CUE

Nope, I did the same and there is no difference. Even the speedo is still dead on ***** accurate.

BassAckwards

The only gear that would make sense to go to is 4.10 and for the price of a 4 wheel drive gear swap from 3.73-4.10 it wouldn't be worth it at all. Very little gain there. If you had 3.55 maybe...

safetypin

imagine how the chevy guys with 308 gears feel!

hardhat

4.56's do it!

hardhat

Yeah the 5.3 with 3.08's sucks so bad. I had to drive a friend of mines. Try to get on that thing when your at the bottom of 2nd gear and its