Looking for some knowledge here folks....


I'm putting a 4" BDS suspension lift on a 6.2L (3.73 Gears) next week and cannot decide what size tire to put on. Up until recently I've been set on 35's (295/65r20's to be exact). Now I'm entertaining the idea of 37's. I know they'll fit, so there is no concern there. I'm just curious what the board's thoughts are. I've seen a lot of folks posting their 37's on the 6.7 trucks, but none with the 6.2. So, I have a few questions. TIA!

1. First, would you even entertain the idea of 37's with a 6.2L
2. I have the 3.73 gears, but I don't tow a lot (hardly at all really).
3. I know mileage will suffer, any idea of the difference between 35's and 37's?
4. This is a daily driver for me.
5. How does speed re-calibration work? Can a shop usually do that? I have very limited understanding on how to remedy the odometer/speedometer issues that arise from big ole tires.

Any and all expertise the board has is greatly appreciated. And you can tell me that 37's are dumb. I get how one would think that

 

With that gear and that gas engine. You should have no problem running those tires. I don't really see any con with it at all. However with the 6.2 gas engine you will see a drop in gas mileage but I don't think it will be too bad. The BDS 4.5 inch lift calls for 37s anyway.

I am am going to get the BDS 6 inch lift which calls for 38s but am still going with 37.


have you ever had a lifted truck before?

speedo calibration can be done with a programmer I believe

 

You pretty much have to get 37's if you are going 4.5", it would look silly with 35's imo.

35's --> 0-2.5" level
37's --> 4-5" Lift
38's --> anything above


You'll take a noticeable hit in mpg, especially with a gas motor. The only way to calibrate for anything above 35's would be with a hypertech speedo calibrator. You'll need to take the instrument cluster out of the dash to install. 35's can be calibrated at the dealer or in your driveway with Forscan.

 

without being calibrated you're running how much slower/faster?

3 mph prolly?

and you don't think 37s would fit a 6inch lift?

sorry not trying to thread hijack

 

Well, aesthetics is a matter of opinion. BDS is a 4" lift. It is advertised as capable of housing 37", yes. The below are 35" however.






And straight from BDS, this is pictured with 35's.



IMHO, these don't look silly, but there is some room for bigger tires. I'm just trying to decide whether it's worth it. Thanks for the feedback.

 

Yes, 37's would work on a 6", I meant more that 38's are cleared for larger lifts. Of course it always depends on your offset on the wheels too.

And yes, its all personal preference. If 35's fit stock though, I personally think it looks a little weird with a 4.5" over that.

 

I plan to replace the 35's with 37's when the original tires wear out. The truck has a four inch Waldock lift.

 

My opinion: a 6.2 with 3.73 gears turning 37s would be very slow and sluggish compared to stock and would suck down fuel like no tomorrow.

 

if your going with 37's keep it lower to help keep the wind resistance down some to help offset the power and mpg loss. 35's are for stock or reverse leveled trucks, 37's look right on leveled trucks and 4" needs 38's or higher

my opinions of course

 

^This is spot on. My 4.30's and fairly light G015 35's take enough away from the 6.2.

 

4" lift "must" run 37's otherwise (IMO) there'll be too much of a gap between the top of the tires and the fenders. If you want to run 35's don't lift it just "level it."

By the way, 37's are typically a lot less costly than 38" tires. A lot more money for 1" taller tire (1/2" taller truck).

YMMV

 

 

I'd get the 37s as you already have the bug or maybe get a true 35 as you'll find many measure 34 point something. As for the 6.2 turning em with 3.73s I don't see why it wouldn't as my old '99 with the v10 and 3.73s was just fine and the 6.2 is considerably more stout of a motor.

She'd make those 35 Toyo mts bark easily

 

Ditto. It's going to be a slug. I wouldn't run 37's with a 6.2L and 3.73's. Those tires will be heavy as well. I bet you'd never use 6th gear unless it was flat and had a tail wind. 4.56 min., 4.88 probably best IMO and MPG's would be a bit better but not great.

 

he will lose several mpg, even more so depending how its driven. braking will take more effort to get it stopped. highway speeds it will be hunting between the top couple gears, even on the smallest of hills. towing anything of significant weight and he'll be in serious trouble, with lack of power and braking ability. for a non-towing city truck , most of this stuff will be irrelevant


with a high negative offset wheel youll also wear out front end and ball joint components sooner and it pulls the driveshaft yokes out so you may get some vibration, more wear on those tail shaft bearings and seals