Running 33" tires on 3.54 gears...

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Lethalweapon100

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...is probably a bad idea.

I intend to put 33s on my truck after i level it out and put on new shocks. Im pretty sure im going to have to regear, though, i suppose thats alright...but im having trouble reading gear ratio to tire size charts. So, what gears should i be running with 33s? Ive heard 4.10, 4.56, some say keep the 3.54... i don't know. I want whatever is going to have the truck perform like mostly stock, keep around the gas milage i have (butt dyno says somewhere between 10-13 MPG) and still perform alright offroad. It'll be around 95% daily driving, 5% offroading. Mostly light trails, probably some mud.

Truck is a 1997 Ram 2500, by the way. Im going to go out and try and read the diff tag right now, but last time i checked, it was pretty rusted.

EDIT: I bring good news...I think. Looked up how to read Dana Axles, it would appear my front axle is a Dana 44. But theres a little tag on the diff cover, and this is what it reads:

52098838 (4, A, Triangle)C

4.10 61072 (7, Z)-2

Whats in parenthesis is what the digit could potentiality be, because i can't read it. But it does say 4.10. I would imagine that means i have 4.10s in the front. Now that i know that, is it likely that i also have 4.10s in the rear also?

Edit 2: judging by this picture, I'd say my rear is a Dana 60. http://imgur.com/5Lsk1dL
 
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Merc225hp

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1997 2500 will not have a 44 in the front that would be 95 and under light duty. -2 is indeed 4.10 ratio for the 60 diff's. On the front diff axle tube you will find the BOM number stamped into it. Might take some cleaning to find it but it should be there. Post it up when you find it.
 
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Lethalweapon100

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1997 2500 will not have a 44 in the front that would be 95 and under light duty. -2 is indeed 4.10 ratio for the 60 diff's. On the front diff axle tube you will find the BOM number stamped into it. Might take some cleaning to find it but it should be there. Post it up when you find it.
Will do. Thanks for the help.
 
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Lethalweapon100

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So assuming i have dual D60s, with 4.10 gears, could I run 33s without worry? After consulting the chart, it says the upgraded tires would result somewhere between better gas milage and near factory ratio.

Edit: http://imgur.com/k2Jpwhf
 

NYCruiser

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You're going to upgrade to 33" tires? With 4:10 gears, what tires are you running now? What RPM are you pulling when on the highway?
 

zeustheram

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i have a 1997 dodge ram 2500 and im running 35's on the dana 60's havent regeared them or anything. and mine does just fine driving.
 
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Lethalweapon100

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AWESOME. One less thing to worry about changing. Just curious, whats the biggesy size I could reasonably run on 4.10s?

Thanks a bunch. I'm still a n00b when it comes to this stuff.
 

Merc225hp

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What is your truck rc/sb, rc/lb, cc/sb, cc/lb?
 

Merc225hp

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Ok thanks so 138.7 is you wheelbase. 3" min for a lift to fit 35's on a 2500.
 

dodge dude94

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33s are doggy with stock gears anyway. lol

Well, 3.55s anyway.
 

Merc225hp

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4.10's and 33's you will be a happy camper.
 
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