Author Topic: suspension flex  (Read 1192 times)

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Offline brokenwrist21

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suspension flex
« on: March 31, 2011, 11:28:38 PM »
ok so i dont know if my jeep is flexing like it should but, i measured the the lowest point of the front fender and at static ride it's 43.25", with the left front tire raised just untill the tire is barely contacting the floor it now sits at  58.75". is 15.5" to little flex or should it be more. i have a rubicon 4" standard duty lift, confer front lift shackels approx 1.5", currie boomerrang rear shackles. the rear shackles are greasable but nothing else is. doestech shocks, came with the lift they have plenty travel. i checked with the sway bar unpinned. what am i missing?
'93 yj 4in rubicon express lift, 33" bfg mud terrains, yella terra roller rockers, 4.0l throttle body, rv cam, k&n air filter, yukon axles and gears, detroit locker, aluminum radiator, msd 8.5mm super conductor wires, full syn. fluids.

Offline Jeffy

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Re: suspension flex
« Reply #1 on: March 31, 2011, 11:44:37 PM »
Track bars still on?
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline neale_rs

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Re: suspension flex
« Reply #2 on: April 01, 2011, 08:29:35 AM »
It sounds like it is flexing fine.  The things to check are track bars, like Jeffy mentioned, and see if the shocks aren't limiting the droop. There is not much else to check on a leaf spring suspension although there are other things you could do to improve flex: open up the spring clamps, baja bushings, revolver shackles, etc.

'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Offline Bounty Hunter

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Re: suspension flex
« Reply #3 on: April 01, 2011, 10:15:49 AM »
15" doesn't sound too bad for an arched spring.  Remember that flatter springs flex better, and repeated overcompression of springs will shorten spring life.  Make sure the bumpstops are properly extended to prevent overcompression.

Offline brokenwrist21

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Re: suspension flex
« Reply #4 on: April 01, 2011, 10:45:07 PM »
shocks, still have a couple more inches of compression and droop all around.
« Last Edit: April 01, 2011, 10:51:15 PM by brokenwrist21 »
'93 yj 4in rubicon express lift, 33" bfg mud terrains, yella terra roller rockers, 4.0l throttle body, rv cam, k&n air filter, yukon axles and gears, detroit locker, aluminum radiator, msd 8.5mm super conductor wires, full syn. fluids.

Offline brokenwrist21

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Re: suspension flex
« Reply #5 on: April 01, 2011, 10:49:32 PM »
front and rear track bars removed. poly bushings, going to replace all fronts again with greasable shackle bolts and greasable main eye bolts and bushings. same with rear main eye bolts and bushings. i hab a friend tell me to loosen my shackle bolts then retighten but not to factory torque, leaving them a little loose.
'93 yj 4in rubicon express lift, 33" bfg mud terrains, yella terra roller rockers, 4.0l throttle body, rv cam, k&n air filter, yukon axles and gears, detroit locker, aluminum radiator, msd 8.5mm super conductor wires, full syn. fluids.

Offline Jeffy

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Re: suspension flex
« Reply #6 on: April 02, 2011, 09:45:29 AM »
If you have nylock nuts for your shackles you can loosen them.  Stock shackles bind alot more then aftermarket as the stock cup the bushing.
Youtube Channel: https://www.youtube.com/channel/UCZNlr60GXH5OlKIFrT7P6mg
My Jeep: http://4bangerjp.com/forums/index.php?topic=2783.0
"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline sharpxmen

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Re: suspension flex
« Reply #7 on: April 02, 2011, 10:25:54 AM »
what Jeffy ^ said and probably safest way to do it is to go with a/m shackles and poly bushings, in that case the shackle would sit on the bushing sleeve when the bolt is tightened and those sleeves rotate freely in the poly bushings (greased of course)
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
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