TriAxleDump Posted July 15, 2010 Share Posted July 15, 2010 Why do some Camelbacks that drive by me make a "jingle bell" type of noise when they hit the bumps? It seems to be a common thing but not all of them make the noise, so does something have to be replaced? Quote Link to comment Share on other sites More sharing options...
fifth wheel Posted July 15, 2010 Share Posted July 15, 2010 I hear the same noise around each December,not sure if it is coming from the rear ends, but it could be. 1 Quote Link to comment Share on other sites More sharing options...
Rob Posted July 15, 2010 Share Posted July 15, 2010 Why do some Camelbacks that drive by me make a "jingle bell" type of noise when they hit the bumps? It seems to be a common thing but not all of them make the noise, so does something have to be replaced?Sounds more like driveline noise rather than suspension noise. Check the drive splines in the driveshaft, dust/debris collars on the shafts for broken welds allowing independent rotation, and loose/dry universal joints or yokes.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
fjh Posted July 15, 2010 Share Posted July 15, 2010 Sounds more like driveline noise rather than suspension noise. Check the drive splines in the driveshaft, dust/debris collars on the shafts for broken welds allowing independent rotation, and loose/dry universal joints or yokes.RobThe spring boxes have steel side blocks that sit loose in the box thats likly the sound you hear. Quote Link to comment Share on other sites More sharing options...
Rob Posted July 15, 2010 Share Posted July 15, 2010 The spring boxes have steel side blocks that sit loose in the box thats likly the sound you hear.Hi Fred, wouldn't the insulators be about beat to snot to allow the plates to rattle? I've never heard the sounds mentioned but sure have a lot of driveline noise.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
rhasler Posted July 15, 2010 Share Posted July 15, 2010 Hi Fred, wouldn't the insulators be about beat to snot to allow the plates to rattle? I've never heard the sounds mentioned but sure have a lot of driveline noise.RobHi Rob. I think fjh may be right. I've never noticed the noise referred to, but most of our trucks carry tire chains year round. The "T" blocks are more or less a means of limiting the travel of the spring side to side. The lighter suspension setup (I think only the SS34 but maybe the SS38 too) doesn't use the blocks. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment Share on other sites More sharing options...
fjh Posted July 15, 2010 Share Posted July 15, 2010 Hi Rob. I think fjh may be right. I've never noticed the noise referred to, but most of our trucks carry tire chains year round. The "T" blocks are more or less a means of limiting the travel of the spring side to side. The lighter suspension setup (I think only the SS34 but maybe the SS38 too) doesn't use the blocks.Ive seen them with out the T blocks but very seldom! usually a 38 suspention in a tractor would be void of these!A gravel truck most always had em 38 0r 44.I'd be looking for a cracked drive shaft of bad ujoint if it had a ringing noise thou the spring box plates would be more of just a rattle clanking sound going over bumps I would think! 1 Quote Link to comment Share on other sites More sharing options...
granitefan713 Posted July 18, 2010 Share Posted July 18, 2010 I know exactly the noise you're referring to. I'd say 99% of Mack straight trucks I hear going over a bump make this noise. But I too have no idea why. 1 Quote http://www.flickr.com/photos/granitefan713/-Dave Link to comment Share on other sites More sharing options...
bullhusk Posted July 18, 2010 Share Posted July 18, 2010 Guys I remember Paragon Oil in Port Newark NJ had a bunch of B Model Mack tandem tractors that made that noise, I once asked one of their drivers what it was, he said it was something in the Mack suspension, and that it drove them crazy!BULLHUSK Quote Link to comment Share on other sites More sharing options...
terry Posted July 19, 2010 Share Posted July 19, 2010 The spring boxes have steel side blocks that sit loose in the box thats likly the sound you hear. He has hit it dead on ! Terry Quote Link to comment Share on other sites More sharing options...
mikesheldon Posted July 21, 2010 Share Posted July 21, 2010 Sounds like a pot hole ate your front end. I bet a loose or broken strut and maybe a bad output shaft.Could be as easy as a linkage in the steering.I would get an estimate and advice from the shop on this one. Quote Ford trucks Link to comment Share on other sites More sharing options...
Titanbuilder Posted March 4, 2020 Share Posted March 4, 2020 This is still driving me crazy but I found it after 1 1/2 years of shaking everything on the truck. I was adjusting the brakes and just bumped the bottom cover where the pads are with a hammer, and there it was a ringing tinkeling noise. Something is loose in there and making the noise, maybe a dial pin. Someone please chime in so I can put this behind me. Quote Link to comment Share on other sites More sharing options...
blackdog2 Posted March 4, 2020 Share Posted March 4, 2020 Square blocks that are along springs in spring caps . They stop rears from twisting and walking I put them in all rears . Quote Ed Link to comment Share on other sites More sharing options...
j hancock Posted March 4, 2020 Share Posted March 4, 2020 The ATRO pads seem to last longer than the OEM version. The rattle is the spacer block blackdog mentioned and is Mack OEM 13QK246 and is available in the aftermarket as well. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
mechohaulic Posted March 4, 2020 Share Posted March 4, 2020 it's going to depend on what size rear. my vote goes with earlier comments , noise being steel side blocks . now if truck has lighter suspension that's another story. hear the noise coming you know your about to see a real truck! Quote Link to comment Share on other sites More sharing options...
Titanbuilder Posted March 4, 2020 Share Posted March 4, 2020 Thanks I see them in the diagram, guess i'll live with it until pads are gone. At least I can stop looking for the noise! Quote Link to comment Share on other sites More sharing options...
OldRedMack Posted March 5, 2020 Share Posted March 5, 2020 You will also get this noise if you have a hitch on the back. The d-rings for the safety chains slapping on the hitch plate. Quote Link to comment Share on other sites More sharing options...
Rob Posted March 5, 2020 Share Posted March 5, 2020 But isn't this usually masked or covered by the sound of a banging tailgate, slamming bed on the frame rails, hopping suspension over railroad crossings, or good ole american potholes? Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
carlotpilot Posted March 5, 2020 Share Posted March 5, 2020 On 7/17/2010 at 9:27 PM, granitefan713 said: I know exactly the noise you're referring to. I'd say 99% of Mack straight trucks I hear going over a bump make this noise. But I too have no idea why. thank you for adding the flickr link .lots n lots of great pics. Quote Link to comment Share on other sites More sharing options...
navypoppop Posted March 5, 2020 Share Posted March 5, 2020 (edited) I remember back in the 50's-60's the camelback tandems didn't have rubber cushions on the spring caps but was told that they were small coil type springs that always would break and cause the "jingle bell" noise. I used to love the sound because you knew a twin screw Mack was coming. Edited March 5, 2020 by navypoppop mispelling Quote Link to comment Share on other sites More sharing options...
rjk440 Posted March 6, 2020 Share Posted March 6, 2020 fjh is right mine did it before and shortly after rebuild normal Quote Link to comment Share on other sites More sharing options...
Lmackattack Posted March 6, 2020 Share Posted March 6, 2020 Learn something new every day. I always figured it was worn rubber pads down to the metal. all the Mack roll off trucks or scrap yard trucks had the heavy rears and would make that noise. Quote Link to comment Share on other sites More sharing options...
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