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#1 |
Account Suspended
Join Date: Apr 2009
Location: Oklahoma City
Posts: 4,709
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got a hop! 4x4 issue moved from 88-98 forum
Hey guys, I have a question about my suspension that someone might be able to help me with. About 2 months ago, my truck started "hopping" when I hit a bump around 35-40 mph. It does it really fast and I have to slow down to make it stop. Sometimes it almost feels like it's bouncing side to side like a twisting motion and it's so severe that I can't tell if it's coming from the front or the rear. I thought it was a loose wheel so I checked them all and they were tight. I crawled underneath and looked for something amiss but couldn't really see anything other than a shock leaking on the rear. I replaced all 4 shocks just to be sure but it's still doing it. The truck is a 1990 GMC 4x4 1/2 ton. I'm running 16" Eagle alloys and 265/75/16 tires. The wheels have been on the truck for several years now and the tires for about 1.5 with approx. 40% tread left. Someone suggested the front torsion bar but all the grommets seem to be intact. Anybody else have this problem or a suggestion on what I might check next?
Last edited by highperf4x4; 08-23-2009 at 12:29 AM. |
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#2 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: got a hop!
Givin' you a bump TTT
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#3 |
Account Suspended
Join Date: Apr 2009
Location: Oklahoma City
Posts: 4,709
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Re: got a hop!
Thx,
nobody has any ideas or a similar situation then? ![]() Last edited by highperf4x4; 08-23-2009 at 09:37 PM. |
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#4 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,754
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Re: got a hop!
Two things come to mind. First, shocks are gone. The other thin is possibility of a broke leaf spring. I would look closely at the Axle U-bolts, then check the shocks (and their mounts), My 2wd had what seemed to be same problem and when I replaced the shocks, the problem went away.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#5 |
Account Suspended
Join Date: Apr 2009
Location: Oklahoma City
Posts: 4,709
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Re: got a hop! 4x4 issue moved from 88-98 forum
Yeah shocks were my first guess too. So I replaced all of them and used new hardware but it's still doing it. I will take a gander at the leaf springs and see if I can see a broken one.
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#6 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,862
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Re: got a hop! 4x4 issue moved from 88-98 forum
Don`t give him a bump.His front end will start hopping.
![]() Just kidding around.I`ve have this problem before and it was my idler arm.I`ve had to replace mine about every 80,000 miles.Jack it up and see if the wheel has play front to back.Other links like tie rod ends could be bad,but mine`s got 260,000 miles on it and I`ve only had to ever replace the idler arm.It`s a common problem with these trucks.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#7 |
Account Suspended
Join Date: Apr 2009
Location: Oklahoma City
Posts: 4,709
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Re: got a hop! 4x4 issue moved from 88-98 forum
![]() Wow, I checked the idler and it's shot. Floppin all over the place. Thx for the info bro. I'll get it changed and see if that takes care of it! ![]() It looks like it will be a challenge to replace it on mine. Have you replaced one on a 4x4? Last edited by highperf4x4; 08-24-2009 at 10:04 PM. |
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#8 |
Special Order
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Location: Mt Airy, MD
Posts: 85,862
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Re: got a hop! 4x4 issue moved from 88-98 forum
Yes.I took the skid plate off and went in through the front.It`s a pain.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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