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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Suspension Discussion and Modification
Chasing that "frt end clunk"
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<blockquote data-quote="Hasty" data-source="post: 1394473" data-attributes="member: 13728"><p>Clunk is gone, took a slightly different route than originally intended. First,I’ve come to the conclusion that there are about a dozen different sources of a front end clunk. I don’t daily the truck but when reflecting back the clunk was progressively worsening. I’ve always been suspect of the shocks since last rebuild, but I confirmed my suspicion enough to investigate this weekend. </p><p></p><p>A little context, I’m usually driving around when it’s warm outside, clunk is predominately on sharp square edge bumps, think fast shaft speed. Son had a late baseball practice and it cooled down nicely and on the same route home the clunk was noticeably better. This led me to think about an internal factor in the shock, namely the IBP. I rebuilt the shocks approx 15K miles ago as my first attempt so I decided to rebuild again. This time I was going to pay extra attention to the IBP current position and I was going to set is 25% into its stroke on rebuild. For those who’ve rebuilt these shocks know that the diy thread doesn’t specify and contacting Fox directly says to the snap ring. I did some research on another forum and 25% is a fairly solid number for IDP depth. What I found when opening the shock was the IBP was up against the snap ring/topped out. This to me would make sense why on sharp square edge bumps that the shock piston will drive the IBP down then on rebound slam back into the snap ring making a clunk. </p><p>I rebuilt the shocks setting the IBP down about 25% into its travel. Buttoned the shocks up, charged and reassembled all. I’ve been driving around the past 1 1/2 days, it’s hot as hell and no clunk.</p><p></p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="Hasty, post: 1394473, member: 13728"] Clunk is gone, took a slightly different route than originally intended. First,I’ve come to the conclusion that there are about a dozen different sources of a front end clunk. I don’t daily the truck but when reflecting back the clunk was progressively worsening. I’ve always been suspect of the shocks since last rebuild, but I confirmed my suspicion enough to investigate this weekend. A little context, I’m usually driving around when it’s warm outside, clunk is predominately on sharp square edge bumps, think fast shaft speed. Son had a late baseball practice and it cooled down nicely and on the same route home the clunk was noticeably better. This led me to think about an internal factor in the shock, namely the IBP. I rebuilt the shocks approx 15K miles ago as my first attempt so I decided to rebuild again. This time I was going to pay extra attention to the IBP current position and I was going to set is 25% into its stroke on rebuild. For those who’ve rebuilt these shocks know that the diy thread doesn’t specify and contacting Fox directly says to the snap ring. I did some research on another forum and 25% is a fairly solid number for IDP depth. What I found when opening the shock was the IBP was up against the snap ring/topped out. This to me would make sense why on sharp square edge bumps that the shock piston will drive the IBP down then on rebound slam back into the snap ring making a clunk. I rebuilt the shocks setting the IBP down about 25% into its travel. Buttoned the shocks up, charged and reassembled all. I’ve been driving around the past 1 1/2 days, it’s hot as hell and no clunk. Sent from my iPhone using Tapatalk [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Suspension Discussion and Modification
Chasing that "frt end clunk"
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