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  1. #1

    Default 3/4 ton torsion key on a 1500

    Greetings All,
    I saw a truck yesterday that had some 285 tires on it. It looked like a lot of rubber! The front clearance looked close but it had plenty of room in the rear. I asked the guy if he had any lift work done. He said all he had done was install some Torsion Keys from a 2500 truck. Is that something that is being done?

    1989 Chevy V1500 Suburban 4X4, long tube headers & xover pipe. w/1985 350 4bbl.
    2002 Silverado 1500 5.3L Ext. Cab
    2005 Wrangler Rubicon 4.0L
    1990 Miata

  2. #2
    Sr. Engineer
    Join Date
    Dec 2011
    11-22-boogie woogie avenue


    285,s will fit without raising the torsion bars any . If you go any bigger can use bars to lift up to 2" any over this
    Will mess with alignment.
    Is that forest hills N C? if so i used to live there when i was a kid.
    Last edited by dipstick; 04-03-2012 at 05:04 PM.

  3. #3


    No, I'm in Maryland. Apparently there is a Forest Hill in many states, cause I hear that alot........

  4. #4
    Master Mechanic Jimmeh's Avatar
    Join Date
    Apr 2009
    Columbia Falls, Montana, United States
    Blog Entries


    You can use 3/4 ton keys but as mentioned, you will need an alignment afterwards. Not sure how they compare to adding height to just a regular leveling kit to your truck. I know for a fact that the 03-06 trucks can run 33's without a leveling kit since I ran with that setup for a year with minimal rubbing daily driving, but just comparing my dads 2000 to mine, his seems to ride a little lower and would be skeptical if he could run bigger than 265's without some rubage on stock.

    Also remember that when you go up a tire size, you will need to recalibrate your speedo.
    2005 Chevy Silverado W/T
    4X4|4.8 with some mods (has only slightly more pull than a 5.3)|Auto|4 door ex cab|Cooper Discoverer AT/3's in 285-75/17's on Helo 842's|Cooper Discover M+S 265-75/17's on Devino DV349's|Flowmaster 40 Single in Dual out with custom bent pipe from the end of the cats back|2" Procomp leveling kit|Custom made center console|Custom dyno tunes|Air Raid CAI|Air Raid Throttle Body Spacer|Apex brand topper|Kenwood Head Unit with Kenwood speakers|Painted mirrors/grille|Debadged except front emblem|Bilsteins front and rear
    Planned mods not in order
    2 inch lift|Custom front/rear bumper|hitch tire carrier|roof basket on topper, bars on cab|finish center console build|install Midland CB|Power options|Tint|Custom made raised bed in the bed of the truck|Lund LunarVisor
    Also have a 1992 Ford Ranger with a lot of stuff done to it. Currently waiting for a bit of a rebuild.

    "The only woman I'm pimping from now on is Sweet Lady Propane. And I'm tricking her out all over this town."

  5. #5


    I have a 2002 silverado, and had 285/75r16 with stock height. Didn't crank the torsion bars at all. Upgraded to 33x12.50r18 and i had rubbing issues. AS for the torsion keys, the 2500 will fit the 1500, but if you want to cheap out, buy torsion keys off of a stock early 2000's F150 from a junk yard, they fit and have an offset to raise the truck around 3".
    2002 Chevrolet Silverado 1500 z71 1985 Chevrolet Silverado k10 2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    6.5" BDS Suspension Lift Edelbrock Carb & Polished Intake Manifold & Valve Covers NAPC Race Transmission & NAPC Built Transfer Case
    EFI Live Comp Cam and Valvetrain Snow Performance Methanol Injection
    35" Toyo Open Country Mud Terrain on 18" Ion Alloy 179's Headman Long Tube Headers and True Dual Exhaust FASS 150gph Titanium Series Pump
    AirAid Cold Air Intake with K&N Dry Filter & AirAid PowerAid Throttle Body Spacer 2" Suspension Lift 33x12.50r15 Tires EFI Live & AFE Stage 2 Intake
    Pacesetter Long Tube Headers with Cats Gone True Dual Exhaust FlowPro 3.73 Gears Yukon Grizzly Locker with Mag-Hytec Cover & Traction Bars
    NGK Iridium Tips & MSD Ignition Plug Wires Baja Spare Tire Holder 33x13.5 Hankook rt03 18" XD Rims
    Innovate LC-1 Wideband o2 Sensor x2 HID's all around LED taillights and 3rd brake light
    BDS Dual Steering Stabilizers Pioneer Double-DIN Touchscreen Navigation with Two 10" Subs under rear seat
    Electric Fan Autometer Pressure, Boost, and Pyro Gauges
    4.56 Gears Airlift Air Bag Suspension

  6. #6
    Sr. Apprentice TnT817's Avatar
    Join Date
    Nov 2011
    Dayton, Ohio


    Won't cranking up the torsion bars wear out the front end a lot faster because of the cv and ball joint angles?

  7. #7
    Master Mechanic Jimmeh's Avatar
    Join Date
    Apr 2009
    Columbia Falls, Montana, United States
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    Quote Originally Posted by TnT817 View Post
    Won't cranking up the torsion bars wear out the front end a lot faster because of the cv and ball joint angles?
    Yes. And because you can't have less than 10 letters in a post, I will say "Yes" again....along with all the rest of that.

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