Bigger A/T Tires on Stock Suspension? 96 k2500 Suburban

[Krokadyel]

I wanted to see if anyone could help me out, I was wondering if it would be possible to fit a decent size BFG All-Terrain on my truck without Lift.

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[Wagonbacker9]

You can easily clear a 31" equivalent... I've got 285/75/16s on my K2500. I've got a block in the back, but I wouldn't call it necessary... a crank up front was required.

 

[Krokadyel]

Thanks for the insight wagon, do you think my stock gears would be fine with 31s?

 

[Wagonbacker9]

I've got 3.42s. I'm not going to claim its ideal, but yes, you'll be fine.

 

[Krokadyel]

I might do gears just incase, since burbs already put so much stress on their trannys. What did it cost you switching to the 3.42s? if you dont mind me asking.

 

[Wagonbacker9]

I might do gears just incase, since burbs already put so much stress on their trannys. What did it cost you switching to the 3.42s? if you dont mind me asking.

Factory ratio. If I was going to pay for gears, It'd be 3.73 or 4.10.

 

[Krokadyel]

hahaha i didn't realize that. I guess ill look around and see what it will cost me for 4.10s

 

[Krokadyel]

My diff code in the glovebox is GT5, so apparently i already have 4.10 gears. Good to know

 

[kamokevin]

Do you know what ratio you have? If you have 3.73's and you get 285/75 or equivalent sized tires, I wouldn't worry about it. But 4.10's would be ideal.

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If you don't know what gears you have look in your glove box and find the rpo code that corresponds with one of these:

GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSITRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Also if you have 4wd, you will have to swap gears up front as well, so remember to account for that if you price out some 4.10's

 

[kamokevin]

My diff code in the glovebox is GT5, so apparently i already have 4.10 gears. Good to know

Nevermind you beat me to it haha, you're good to go on a tire size increase then