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Thread: Uneven rear end, how to fix?

  1. #1
    Diesel junkie konstan's Avatar
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    Default Uneven rear end, how to fix?

    Got a 95 Sierra 2500 4wd with a 6.5 td motor. If you look at the truck straight from the back, the driver side sits lower.

    I heard tell that it's the fuel tank location that causes this after so many years... So, how can I correct this?
    1995 GMC Sierra 2500 6.5TD - most basic mods done
    1982 Mercedes 300D turbo diesel - rebuilt motor
    1982 Mercedes 240D
    1975 International Farmall 1566 Turbo
    1937 Farmall M (gas)
    1948 Ford 8N (gas)
    Various gasser trucks and even a car (wife's)

  2. #2
    robzombie4551 robzombie4551's Avatar
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    New springs in the rear and crank the bars up front.

    Or the poor mans/redneck way is to shim the sagging side the amount it's sagging.

    IE: 2 inch sag equals two inch block on the offending side. Cost less than twenty bucks.

    Do it right a few hundred.
    1995 GMC suburban. 4x4, 235,000 miles.

    OPTIMISER/[NAVISTAR 506 block] [30,000 miles] HX40 CUSTOM 20lbs. boost

    342 gears. Flowmaster cross/over 4 in. diamond eye exhaust

    New injs.popped to 2250

    six tune custom chip,

    boost/trans/egt.gauges. alcoa five star rims.

    DMAX fan and DIY clutch mod.

    PMD relocated behind the bumper.

  3. #3
    Diesel junkie konstan's Avatar
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    Lol just spent a few $$$ on pmd relocation w/new pmd; what's the downside to the redneck method?
    1995 GMC Sierra 2500 6.5TD - most basic mods done
    1982 Mercedes 300D turbo diesel - rebuilt motor
    1982 Mercedes 240D
    1975 International Farmall 1566 Turbo
    1937 Farmall M (gas)
    1948 Ford 8N (gas)
    Various gasser trucks and even a car (wife's)

  4. #4
    Quarter Million Worth btfarm's Avatar
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    Measure it at all 4 corners. Then I would try cranking the driver's side T-Bar 1 turn 1st (make sure you are up on stands), let it down, bounce it and then measure again to see what difference. Work from there.
    Mike
    2006 GMC 2500HD LBZ ext/sb Black. 265,000 miles and 6085 hrs as of 8/19/14. Predator tune (at 133k) WAS Totally stock except tires (285 BFG KOs), hitch, Line-X over the rail. Westin bars, Adrian crossover box, Putnam XDR Class V hitch / Prodigy Brake control. Blocked, fingered and pcv reroute. Full 4" Diamond Eye SS Exh from Leroy Diesel
    Towing Interstate 1 7' x 18' utility trailer (10k) usually at limit or more
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  5. #5
    robzombie4551 robzombie4551's Avatar
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    I wouldn't carry a heavy load in the bed or tow with a high tongue weight, and it's just a band-aid but won't really do any harm if you don't overload it.

    You could also put helper springs/load leveler {adjustable} on the springs and adjust them to even out the load and be able to haul/tow.
    1995 GMC suburban. 4x4, 235,000 miles.

    OPTIMISER/[NAVISTAR 506 block] [30,000 miles] HX40 CUSTOM 20lbs. boost

    342 gears. Flowmaster cross/over 4 in. diamond eye exhaust

    New injs.popped to 2250

    six tune custom chip,

    boost/trans/egt.gauges. alcoa five star rims.

    DMAX fan and DIY clutch mod.

    PMD relocated behind the bumper.

  6. #6
    6.5 nut job/addict
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    Broken leaf springs.Check the sides of the leafs for cracks right above the axle. There is no real "band aid". The broken leaf or leaves need to be replaced. Messing with the torsion bars will only throw it out of alignment further. Figure on a new centering bolt and new u-bolts.
    Barry



    I am not on the Heath Bandwagon

  7. #7
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    Ah yes, the infamous "chevy lean"....

    Lots of stuff out there on it.

    First hit on google:

    http://www.performancetrucks.net/for...x-lean-396513/

  8. #8
    Diesel junkie konstan's Avatar
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    I went out and measured. Axle to frame, ground to frame, all are the same on the left and on the right.
    Then I measured "top of the bed to ground" and sure enough, it's 1" off.
    So, the bed is seated unevenly, with rear pass. corner too low by 1". Can this be corrected?
    1995 GMC Sierra 2500 6.5TD - most basic mods done
    1982 Mercedes 300D turbo diesel - rebuilt motor
    1982 Mercedes 240D
    1975 International Farmall 1566 Turbo
    1937 Farmall M (gas)
    1948 Ford 8N (gas)
    Various gasser trucks and even a car (wife's)

  9. #9
    Real Trucks Don't have Spark Plugs! Dad's 05 LLY's Avatar
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    Sounds like your bed mounts are bad. I'd check them for rust and see if one is rotted away, and if not I'd replace the bushings. That should fix it.
    Ed
    05 CCSB LLY/Allison 4x4 LS. SuperLiner Spray-In Bedliner, Full Amsoil, Predator @ 60HP. 110,000 miles
    08 GMC C4500, 16' Van Box, 6.6L Duramax/Allison, 130k miles.
    Mine: 09 Pontiac G8 GT. 6.0L/6L80E, Rotofab Intake, Pypes Exhaust, 83k miles
    NRA Member, Republican, Patriot

  10. #10
    Diesel junkie konstan's Avatar
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    Ok thanks, I will look into the bed mounts/bushings being bad.
    1995 GMC Sierra 2500 6.5TD - most basic mods done
    1982 Mercedes 300D turbo diesel - rebuilt motor
    1982 Mercedes 240D
    1975 International Farmall 1566 Turbo
    1937 Farmall M (gas)
    1948 Ford 8N (gas)
    Various gasser trucks and even a car (wife's)

  11. #11
    6.5 nut job/addict
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    There is no bushings between the box and frame. Only the cab and core support have bushings. The box is solid to the frame with 8 bolts.
    A broken main leaf spring behind center of the axle will allow the frame to sag that much. Measuring height at the axle will still be good.
    Barry



    I am not on the Heath Bandwagon

  12. #12
    Diesel junkie konstan's Avatar
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    Axle to frame is the same on both sides.
    Axle to ground is the same because it's 1/2 of the tire height. (lol)
    1995 GMC Sierra 2500 6.5TD - most basic mods done
    1982 Mercedes 300D turbo diesel - rebuilt motor
    1982 Mercedes 240D
    1975 International Farmall 1566 Turbo
    1937 Farmall M (gas)
    1948 Ford 8N (gas)
    Various gasser trucks and even a car (wife's)

  13. #13
    6.5 nut job/addict
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    Quote Originally Posted by konstan View Post
    Axle to frame is the same on both sides.
    Axle to ground is the same because it's 1/2 of the tire height. (lol)
    Correct. What I'm saying is that if the main leaf[the one that bolts to the frame] is broken at the axle ,that it still will support the frame in front of the axle but not behind it.
    Maybe I'm totally wrong. Maybe the truck was crashed in the rear and the frame is bent. Adjust the bumper to match the box and it won't be as noticeable.
    Barry



    I am not on the Heath Bandwagon

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