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  1. #1
    Sr. Apprentice
    Join Date
    Jun 2009
    Location
    sioux city, Iowa
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    67

    Default Is it ok to run bigger tire than stock?

    A friend of a friend has a set of 285s for sale for a decent price. Will these be ok to put on my 04 z71? I'm sure they'll clear, I'm just wondering if it will mess up the shift points on the transmission. I read somewhere that putting bigger tires on can burn your transmission???
    93 trans am-FOR SALE!

    87 Buick Turbo-T WE4 Yes, they are fast:he:

  2. #2
    Legend


    mfleetwood's Avatar
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    Default

    My stock tires are 265s and I ran 285s for quite sometime and did not notice any difference in tranny temp. I think you should be okay, but this comment is based on my personal experience only...I am not a mechanic or even someone with lots of experience. However, I do think that you will need to provide your current stock tire size, transmission info, and maybe your gear ratio for someone to give you a sound answer.
    Last edited by mfleetwood; 11-12-2010 at 02:22 AM.


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    TIRES:
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

  3. #3

    Default

    Clearance shouldn't be an issue for you since it's a 4wheel drive, I ran 285x70x17s bfgs mud terrains on my stock 2wd and only had minor rub issues until i did alittle trimming on the plastic innner wall...I didnt notice any difference either in the trans temp, but like said above, im not a mech But i have put over 75k on my 06 in that last year and a half half that was on those BFGs. I did notice however that my speedometer was off by about 5mph. hope that helps.
    4.8L Vortec | 6inch Lift | 35'' BFG ALL TERRAINS | K&N Intake | AirRaid Throttle Body Space | 3inch straight pipe dumped at rear axle | BlackBear Tuned | 2 13in JL Audio Subs | 1000watt HD amp, 2.9 cap | Kenwood Dble Din | Gibson Hi Flo Cats | HIDs Hi/Los 55watt 8000k |4.56 gears |

  4. #4
    Sr. Engineer Sam_A's Avatar
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    Jul 2010
    Location
    Hattiesburg, Mississippi, United States
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    311

    Default

    I ran 285/75r16e's on my 04 Z71 and had no problems. Only think to keep in mind is that the speedometer is 4mph slow above 55mph.


    2003 Chevy Silverado 2500HD LT 4x4, Crew Cab
    6.6L Duramax Diesel (LB7) with an automatic Allison 1000 5 speed.
    Spray-in bed liner, S&B Air Filter, Homemade CAI ram scoop, ball hitch for Gooseneck
    Black toolbox, metallic-black bowtie, 5.5" NV-200C Bumper Off-Road lights behind a blacked-out grille
    285/75R16E BFG A/Ts
    Future Upgrades: Exhaust, CAI, programmer, intercooler, torque converter

  5. #5

    Default

    Yeah its not gonna burn your tranny! The only time I heard was a guy ran 38's on a ranger with a 4 cylinder and crap tranny and had problems but that was because the problem circled on the front!

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  6. #6
    Master Mechanic
    Join Date
    Apr 2009
    Location
    Owens Cross Roads, Alabama
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    634

    Default

    ive been running 285/75/16s on my 04 since i bought it a year and a half ago.and i believe the previous owner also ran the same size.the truck runs great and ive had no issues out of it
    -Dylan
    2004 Silverado 4x4
    4.8L
    1986 K5 Blazer
    8" Superlift w/39.5 super swampers
    1992 GMC Jimmy "Blue Bomber"
    4.3L Vortec

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