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Thread: body sag

  1. #1
    Join Date
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    body sag

    im sure some of you know a lot of the OBS trucks start to sag where the cab and bed gap is... and either the cab sags or the bed sags is there any way to fix this? one side is starting to show on mine and i want to fix it before it gets worse... with poly urethane body mounts help?
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  2. #2
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    Haha...the classic Chevy "lean." Oh wait--the gap between the bed and cab is getting smaller up top? Or is the gap getting bigger?
    I have had several OBS trucks and it had the passenger side "lean." I found out the best way to get rid of it is to go get new rear leaf springs--or go have the existing ones rebent.

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  3. #3
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    Sounds like you need some new body mounts, those poly body mounts should be pretty nice and hold up for a while. Prolly a lot firmer than the stock rubber ones, not sure if that matters or not.
    2002 Silverado 2500HD LB7 CCSB LT
    EFI Live by Rob at ATP, Edge CTS Insight DSP 5 control, S&B CAI, PPE boost valve, Pro Fab AIH, AirDog II 165, PPE WIF sensor delete plug, 5" stainless exhaust, Cognito braces & HD tie rods, H2's 315/70 R17 BFG's

    2004 Tahoe LT
    2006 Silverado Z71 LS
    1971 Chevy C10

  4. #4
    ff_jeff Guest
    Tyler knows allot about body sag... Really he does.

  5. #5
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    Quote Originally Posted by txarkitekt View Post
    Haha...the classic Chevy "lean." Oh wait--the gap between the bed and cab is getting smaller up top? Or is the gap getting bigger?
    I have had several OBS trucks and it had the passenger side "lean." I found out the best way to get rid of it is to go get new rear leaf springs--or go have the existing ones rebent.
    I dont know if he is talking about the chevy lean. I think he is referring to when it looks like the middle on the passanger side is buckling in.
    1951 3100
    1984 C10

  6. #6
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    Quote Originally Posted by ff_jeff View Post
    Tyler knows allot about body sag... Really he does.
    What am I allotting? Jeff--do you know what "allot" means? Oh wait, you are dumb and meant to say "a lot." Just messing fool.
    Anyway--Kyle--let us know more about whats going on... How many miles on the truck?

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  7. #7
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    The gap between the bed and cab is probably smaller at the top. Poly body bushings might help but after a lot of miles, the GMT400 frames actually relax in the middle.

  8. #8
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    Yeah the old chevy frames are crap. (the pops is a dodge fan and that was the first thing he started yelling about when i started into chevy) The OBS isnt near as bad as the mid 80s trucks though. The only way To really fix it is brace the frame in middle sections. As noted the frame "relaxes". Needless to say i hope you arent trying for weight reduction. And btw the more power you add the faster that bend will get worse.

    06 Intimidator SS- Tuned, CAI -DD
    03 Silverado- Last incarnation 13.6... RIP
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    "Seize the day like you seize your noodle" - Shin Chan

  9. #9
    Join Date
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    maine
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    Quote Originally Posted by txarkitekt View Post
    Haha...the classic Chevy "lean." Oh wait--the gap between the bed and cab is getting smaller up top? Or is the gap getting bigger?
    I have had several OBS trucks and it had the passenger side "lean." I found out the best way to get rid of it is to go get new rear leaf springs--or go have the existing ones rebent.
    yeah the chevy lean.... theres no way to get rid of it?? well that sucks the truck itself has roughly 150k on the body. its a 98... this is the best i can find. its only on this side too.. its not bad but id rather it not get worse... any suggestions?

    i duno i just have my days where im like damn... i love my obs truck but im frigen in love with the nbs classic chevys... theres a guy who lives about 2 miles from me. hes got a SBRC 99-02 chevy that i know is a v8 not sure what and is the same color as davids. the thing hasnt moved since last winter... not even all summer. just sits there... he lives in a trailor and his garage colapsed last winter. the truck was outside burried under 6 feet of snow all winter never even brushed it off... i have days where i just want to walk up to his door and ask him how much for it... my only problem is im in love with manual trannys and duno if i could deal with an auto... im just assuming the truck is an auto. as 4.8 5speeds are rare... the front ends can easily be changed to the 03-08 classic if im not mistaken. the truck is already lowered probably a 4/6 and is on GM 20" wheels. its a really clean truck. i jsut have so much time and $$ tied up in mine i dont know if i could start over but the NSB trucks are just so temping. just one of those days i guess... it sucks in maine too because a 2wd SBRC anything is a miracle from god... you go to texas and they pretty much are EVERYWHERES. and WAY cheaper...

    Last edited by Wtfan18; 10-02-2008 at 10:15 PM.
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  10. #10
    Join Date
    Nov 2003
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    Denton Texas
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    Looks like the frame is tweaked, like maybe it carried too heavy of a load near the cab, in the bed. The body lines look like they line up. Take it to a frame shop and have them set the frame back to factory specs.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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