Clunk from front springs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jayssunm · 04-14-2003, 08:12 PM

My SWB67 has been lowered (don't remember by how much). All the bearing, ball joints, tie rod ends, shocks, etc. have been replaced. If I go over a speed bump too fast my springs make a clunk sound when the truck comes back down.

Since I am about the 5th owner of the truck I am not sure what parts where original. Is there some sort of rubber cup that fits either on the top or bottom of the spring to keep it from clunking?

cdowns · 04-15-2003, 01:06 AM

how was the lowering achevied ?? if it was by butchering the springs it's probable the clunk is the coils compressing to beyond max and its coil to coil contact the same thing would happen if they were torched a good quality lowered progressive rate spring would'nt have this problem

jayssunm · 04-15-2003, 01:15 PM

I have both dropped spindles and dropped springs. Don't remember the place I bought them from. Did not torch or cut the springs, truck is low enough to drive without going to bags.

Dropped67step · 04-15-2003, 11:44 PM

ever tryed just slowing down when hitting speed bumps? lol, Put really it is prombly just the spring compressing from the jar of the speed- bump. I use to have lowerd springs before I went to bags and if I Jacked the truck up by the front crossmember instead of under the a-arm the springs would slide out of there resting spot and would set at a angle so you really just have to slow down when hitting real big bumps.

Hotrod70C10 · 04-23-2003, 02:48 AM

I have that problem when I jack mine up if I put the jack anywhere but the lower a-arm. The spring is a little short and it doesn't stay tight in the spring cups. I get the pop sound on the way back down. That's with 2" drop springs

Frank_Zeller · 04-24-2003, 05:30 PM

Your springs could be to short. Measure the distance between the upper control arm bump stop and the frame. Also you have to make sure the bottom of the spring is seated correctly. There is a little hole drilled in the bottom of the lower control arm in the spring pocket. You should be able to see the end of the spring when you look though the hole.

04-14-2003, 08:12 PM	#1
jayssunm Registered User Join Date: Jan 2003 Location: San Diego, CA Posts: 98	Clunk from front springs My SWB67 has been lowered (don't remember by how much). All the bearing, ball joints, tie rod ends, shocks, etc. have been replaced. If I go over a speed bump too fast my springs make a clunk sound when the truck comes back down. Since I am about the 5th owner of the truck I am not sure what parts where original. Is there some sort of rubber cup that fits either on the top or bottom of the spring to keep it from clunking? __________________ 67 Fleetside Shortie, small window, slip & slide tranny Upgrades--small block, tilt column, disc 5 lug conversion (front and rear), Future Projects--suburban gas tank under the bed, rear roll pan, better gas mileage (currently about 6-10 MPG)

04-15-2003, 01:06 AM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	how was the lowering achevied ?? if it was by butchering the springs it's probable the clunk is the coils compressing to beyond max and its coil to coil contact the same thing would happen if they were torched a good quality lowered progressive rate spring would'nt have this problem __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

04-15-2003, 01:15 PM	#3
jayssunm Registered User Join Date: Jan 2003 Location: San Diego, CA Posts: 98	I have both dropped spindles and dropped springs. Don't remember the place I bought them from. Did not torch or cut the springs, truck is low enough to drive without going to bags. __________________ 67 Fleetside Shortie, small window, slip & slide tranny Upgrades--small block, tilt column, disc 5 lug conversion (front and rear), Future Projects--suburban gas tank under the bed, rear roll pan, better gas mileage (currently about 6-10 MPG)

04-23-2003, 02:48 AM	#5
Hotrod70C10 Low & Slow Join Date: Dec 2002 Location: Oklahoma Posts: 1,047	I have that problem when I jack mine up if I put the jack anywhere but the lower a-arm. The spring is a little short and it doesn't stay tight in the spring cups. I get the pop sound on the way back down. That's with 2" drop springs __________________ 70' C-10 LWB Fleetside 4.5/6 drop

04-24-2003, 05:30 PM	#6
Frank_Zeller Registered User Join Date: Jun 2001 Location: Austin, Texas Posts: 796	Your springs could be to short. Measure the distance between the upper control arm bump stop and the frame. Also you have to make sure the bottom of the spring is seated correctly. There is a little hole drilled in the bottom of the lower control arm in the spring pocket. You should be able to see the end of the spring when you look though the hole. __________________ 69 SWB C/10 5-6 drop 700R4 69 Firebird Convert 455 4 spd 70 Torino GT Convert Austin-Texas

04-15-2003, 11:44 PM	#4
Dropped67step Gearhead since birth Join Date: Jul 2002 Location: Ft. Worth TX. Posts: 190	ever tryed just slowing down when hitting speed bumps? lol, Put really it is prombly just the spring compressing from the jar of the speed- bump. I use to have lowerd springs before I went to bags and if I Jacked the truck up by the front crossmember instead of under the a-arm the springs would slide out of there resting spot and would set at a angle so you really just have to slow down when hitting real big bumps.



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