Bouncing like a low rider... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

srvivor71 · 08-05-2011, 08:12 PM

Since I put on my fat 33s I sometimes have a problem on concrete roads with evenly spaced expansion joints. Once I get up to highway speeds (55 +), the truck starts bouncing with each expansion joint. It starts out not too bad, but keeps getting worse and worse until the truck feels like it's literally going to start popping wheelies. I have to slow down to like 30 mph to break the rhythm, then start the process all over.

Would new shocks fix this? Any ideas will be appreciated.

Dunenutt · 08-05-2011, 08:20 PM

New shocks will probably stop alot of it. Jump on the bumper and see if it keeps bouncing after you stop. I cant tell if it is a 4x4 or not, but I have had good luck with Rancho RS 5000's on many of my trucks.

Another thing that may help is tire pressure if they are over inflated they will be alot stiffer.

Longhorn Man · 08-05-2011, 09:39 PM

try runnin the tires at max pressure

capev86 · 08-05-2011, 09:53 PM

yeah...gotta be worn shocks.

struts/shocks on my 91 dynasty got bad right before i junked it (rust, and i pulled the newer 2.5/3spd for my 86 k car wagon). the car would bounce going down the road...like a sine wave in physics class.....LOL

**Stocker** · 08-05-2011, 11:57 PM

Sounds like badly worn shocks to me also... possibly made worse by your tires, but tires alone shouldn't make it oscillate like that. What pressure are you running in those 33s? (I have 33s and no bounce at all).

long69 · 08-06-2011, 04:08 AM

i had a new toyota tacoma a long time ago that the assend would bounce pretty good. but only on the concrete freeways and then only some of them.
personally i think it had something to do with the combination of the shock and the length of the wheelbase and the distance or the seams in the road. my shocks were not bad. i bounced so that i thought i must look stupid to the other drivers.

srvivor71 · 08-06-2011, 05:41 PM

Thanks for the replies. I think mine bounces mostly in the front end - and it really does get wild - just like you said - like a sine wave that keeps getting bigger and bigger. It never happened until I got the 33's. I was driving on an older country highway. I think that the newer concrete highways are made with varying distance between joints to prevent this kind of thing.

I'll max the tires out and see if that helps. Any recommendations for good shocks for a 4 x 4?

Dunenutt · 08-06-2011, 06:21 PM

I'll max the tires out and see if that helps. Any recommendations for good shocks for a 4 x 4?[/QUOTE]

Like I said above, try the Rancho RS 5000's. They have good highway manners, and you can beat on them a bit off road. Plus they are pretty easy on the wallet. Best price I've found was at streetsideauto.com

http://www.streetsideauto.com/

**Stocker** · 08-06-2011, 07:32 PM

I have KYB Gas-A-Justs on mine and they have been a very good shock for the money.

BIGKEV · 08-06-2011, 07:55 PM

Most shocks are re-badged Monroe's, Gabriel's, or Bilstiens. Just get some monroe's and be done without paying the re-badge fees.

08-05-2011, 08:12 PM	#1
srvivor71 Registered User Join Date: Sep 2010 Location: Sullivan County, NY Posts: 455	Bouncing like a low rider... Since I put on my fat 33s I sometimes have a problem on concrete roads with evenly spaced expansion joints. Once I get up to highway speeds (55 +), the truck starts bouncing with each expansion joint. It starts out not too bad, but keeps getting worse and worse until the truck feels like it's literally going to start popping wheelies. I have to slow down to like 30 mph to break the rhythm, then start the process all over. Would new shocks fix this? Any ideas will be appreciated.

08-05-2011, 08:20 PM	#2
Dunenutt Newbee Join Date: Jan 2010 Location: Phoenix, Arizona Posts: 1,406	Re: Bouncing like a low rider... New shocks will probably stop alot of it. Jump on the bumper and see if it keeps bouncing after you stop. I cant tell if it is a 4x4 or not, but I have had good luck with Rancho RS 5000's on many of my trucks. Another thing that may help is tire pressure if they are over inflated they will be alot stiffer.

08-05-2011, 09:39 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Bouncing like a low rider... try runnin the tires at max pressure

08-05-2011, 09:53 PM	#4
capev86 Registered User Join Date: May 2009 Location: Eliot, Maine Posts: 1,314	Re: Bouncing like a low rider... yeah...gotta be worn shocks. struts/shocks on my 91 dynasty got bad right before i junked it (rust, and i pulled the newer 2.5/3spd for my 86 k car wagon). the car would bounce going down the road...like a sine wave in physics class.....LOL

08-05-2011, 11:57 PM	#5
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,579	Re: Bouncing like a low rider... Sounds like badly worn shocks to me also... possibly made worse by your tires, but tires alone shouldn't make it oscillate like that. What pressure are you running in those 33s? (I have 33s and no bounce at all). __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

08-06-2011, 04:08 AM	#6
long69 Registered User Join Date: Oct 2006 Location: lost angeles Posts: 159	Re: Bouncing like a low rider... i had a new toyota tacoma a long time ago that the assend would bounce pretty good. but only on the concrete freeways and then only some of them. personally i think it had something to do with the combination of the shock and the length of the wheelbase and the distance or the seams in the road. my shocks were not bad. i bounced so that i thought i must look stupid to the other drivers.

08-06-2011, 05:41 PM	#7
srvivor71 Registered User Join Date: Sep 2010 Location: Sullivan County, NY Posts: 455	Re: Bouncing like a low rider... Thanks for the replies. I think mine bounces mostly in the front end - and it really does get wild - just like you said - like a sine wave that keeps getting bigger and bigger. It never happened until I got the 33's. I was driving on an older country highway. I think that the newer concrete highways are made with varying distance between joints to prevent this kind of thing. I'll max the tires out and see if that helps. Any recommendations for good shocks for a 4 x 4?

08-06-2011, 06:21 PM	#8
Dunenutt Newbee Join Date: Jan 2010 Location: Phoenix, Arizona Posts: 1,406	Re: Bouncing like a low rider... I'll max the tires out and see if that helps. Any recommendations for good shocks for a 4 x 4?[/QUOTE] Like I said above, try the Rancho RS 5000's. They have good highway manners, and you can beat on them a bit off road. Plus they are pretty easy on the wallet. Best price I've found was at streetsideauto.com http://www.streetsideauto.com/

08-06-2011, 07:32 PM	#9
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,579	Re: Bouncing like a low rider... I have KYB Gas-A-Justs on mine and they have been a very good shock for the money. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

08-06-2011, 07:55 PM	#10
BIGKEV Registered User Join Date: Jan 2011 Location: Prescott AZ Posts: 112	Re: Bouncing like a low rider... Most shocks are re-badged Monroe's, Gabriel's, or Bilstiens. Just get some monroe's and be done without paying the re-badge fees.



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