Knocking After Eibach Pro Truck Lift

10255 Views 66 Replies 12 Participants Last post by mfils89, 3 mo ago

Truefinesse

Discussion Starter · Aug 29, 2020

I been banging my head against the wall on this.. I just installed the Eibach lift from Peak Suspension.. And so far I love it! But about a few days after, i got a knocking sound, first on the passenger side now I'm thinking it's on both sides.. Me and my friend did the lift and he's done a few lifts at his shop so I know we took our time to do mine "6 hours" to be exact. Got the truck aligned and threw 265/70/17 tires on it looks good rides good besides this knock. Doesn't happen all the time but when it does you hear it! After alot of stare and compare to my bosses truck since he has the exact same lift and has the same truck his a 2017 mine 2016 2.8 Z71.. Seems like my sway bar has only about a half of inch in between both sides. His I can fit all my fingers between spring and sway bar. Mine I barley can put a finger if not just the nail of my finger. So I ordered the relocation kit and also longer sway links to pray!! This is what alrighty knocking when alittle flex happens. Just thought I'd share to see what else it could be.. I've torqued bolts twice after Install ALL bolts I touched or took off.. All bushings look good no squishing of any of them. I've been reading on here for about a week now at others comments and opinions so I said F it Im post my problem and see what Colorado colleagues can chime in and give me feedback. Also I'm at the 2.7" seeing and 1" lift block in back also have the diff drop that I'm going to install when the sway bar parts come in.. Thanks 💯

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White016

· #2 · Aug 29, 2020

Truefinesse said:
I been banging my head against the wall on this.. I just installed the Eibach lift from Peak Suspension.. And so far I love it! But about a few days after, i got a knocking sound, first on the passenger side now I'm thinking it's on both sides.. Me and my friend did the lift and he's done a few lifts at his shop so I know we took our time to do mine "6 hours" to be exact. Got the truck aligned and threw 265/70/17 tires on it looks good rides good besides this knock. Doesn't happen all the time but when it does you hear it! After alot of stare and compare to my bosses truck since he has the exact same lift and has the same truck his a 2017 mine 2016 2.8 Z71.. Seems like my sway bar has only about a half of inch in between both sides. His I can fit all my fingers between spring and sway bar. Mine I barley can put a finger if not just the nail of my finger. So I ordered the relocation kit and also longer sway links to pray!! This is what alrighty knocking when alittle flex happens. Just thought I'd share to see what else it could be.. I've torqued bolts twice after Install ALL bolts I touched or took off.. All bushings look good no squishing of any of them. I've been reading on here for about a week now at others comments and opinions so I said F it Im post my problem and see what Colorado colleagues can chime in and give me feedback. Also I'm at the 2.7" seeing and 1" lift block in back also have the diff drop that I'm going to install when the sway bar parts come in.. Thanks 💯

Yep, the sway bar is very close without the relocation kit, but I doubt that is your knock, but hopefully it is. I really don't have a guess what it is. Are you sure it's in the front? Was thinking you did the blocks so maybe something with the rear springs.
I had a knock that sounded like something hitting the firewall, could that be it? It was over small rough stuff off road. I never "fixed" it but I heard it is the bracket under the LF wheel well that makes the noise. It holds the fender or something. Anyway, it was pretty annoying but didn't happen all that much. It stopped on it's own.

Klicht8719

· #3 · Aug 29, 2020

White016 said:
Yep, the sway bar is very close without the relocation kit, but I doubt that is your knock, but hopefully it is. I really don't have a guess what it is. Are you sure it's in the front? Was thinking you did the blocks so maybe something with the rear springs.
I had a knock that sounded like something hitting the firewall, could that be it? It was over small rough stuff off road. I never "fixed" it but I heard it is the bracket under the LF wheel well that makes the noise. It holds the fender or something. Anyway, it was pretty annoying but didn't happen all that much. It stopped on it's own.

Truefinesse said:
I been banging my head against the wall on this.. I just installed the Eibach lift from Peak Suspension.. And so far I love it! But about a few days after, i got a knocking sound, first on the passenger side now I'm thinking it's on both sides.. Me and my friend did the lift and he's done a few lifts at his shop so I know we took our time to do mine "6 hours" to be exact. Got the truck aligned and threw 265/70/17 tires on it looks good rides good besides this knock. Doesn't happen all the time but when it does you hear it! After alot of stare and compare to my bosses truck since he has the exact same lift and has the same truck his a 2017 mine 2016 2.8 Z71.. Seems like my sway bar has only about a half of inch in between both sides. His I can fit all my fingers between spring and sway bar. Mine I barley can put a finger if not just the nail of my finger. So I ordered the relocation kit and also longer sway links to pray!! This is what alrighty knocking when alittle flex happens. Just thought I'd share to see what else it could be.. I've torqued bolts twice after Install ALL bolts I touched or took off.. All bushings look good no squishing of any of them. I've been reading on here for about a week now at others comments and opinions so I said F it Im post my problem and see what Colorado colleagues can chime in and give me feedback. Also I'm at the 2.7" seeing and 1" lift block in back also have the diff drop that I'm going to install when the sway bar parts come in.. Thanks 💯

I have the same lift with 2" blocks in the back. I installed the longer sway bar links, sway bar relocation bracket and differential drop kit. I have a knock on slow washboards but like another member said, could be the fender bracket. With any lift no matter how big or small, things don't sound the same.

Reactions: 1

Truefinesse

Discussion Starter · #4 · Aug 29, 2020

White016 said:
Yep, the sway bar is very close without the relocation kit, but I doubt that is your knock, but hopefully it is. I really don't have a guess what it is. Are you sure it's in the front? Was thinking you did the blocks so maybe something with the rear springs.
I had a knock that sounded like something hitting the firewall, could that be it? It was over small rough stuff off road. I never "fixed" it but I heard it is the bracket under the LF wheel well that makes the noise. It holds the fender or something. Anyway, it was pretty annoying but didn't happen all that much. It stopped on it's own.

I'm going to get under my truck soon here today and just tighten down a bunch of bolts. Also it's easy to reference it to a clunk, reason I thinks it's the sway bar is because it's a fast clunk 😂 like a 2 tap clunk then gone and that's after I bit a decent size water hole. I'm still going to put the relocation and links. Way I see it is start with one thing and then try another if it doesn't work..

Reactions: 1

Truefinesse

Discussion Starter · #5 · Aug 29, 2020

Klicht8719 said:
I have the same lift with 2" blocks in the back. I installed the longer sway bar links, sway bar relocation bracket and differential drop kit. I have a knock on slow washboards but like another member said, could be the fender bracket. With any lift no matter how big or small, things don't sound the same.

Yeah isn't that the truth.. never really thought it could be a different noise from the fender. Since I didn't touch any of that but maybe after the lift stuff gets wacky. I'm see if the relocation and links fix it but I'm still all ears for other fixes from others as well.

Klicht8719

· #6 · Aug 29, 2020

Truefinesse said:
Yeah isn't that the truth.. never really thought it could be a different noise from the fender. Since I didn't touch any of that but maybe after the lift stuff gets wacky. I'm see if the relocation and links fix it but I'm still all ears for other fixes from others as well.

I retorqued every bolt I touched and then some. I put a cushion behind the ECU, checked the steering rack bolts, and tried to check that fender bracket but I have the fender flares which makes it more difficult. All of those things were pointed to by forum members. I've banged on everything under there and the only thing that makes a noise are the inner tie rods...the shroud that the boot clamps to and then to the steering rack.

Reactions: 1

Truefinesse

Discussion Starter · #7 · Aug 29, 2020

Klicht8719 said:
I retorqued every bolt I touched and then some. I put a cushion behind the ECU, checked the steering rack bolts, and tried to check that fender bracket but I have the fender flares which makes it more difficult. All of those things were pointed to by forum members. I've banged on everything under there and the only thing that makes a noise are the inner tie rods...the shroud that the boot clamps to and then to the steering rack.

Yeah but In that case it would be a bigger issue like your bushing on the steering rack itself. But after putting a lift and instantly getting a knock after is a coincidence. I know it's something tapping somewhere but to locate it with out strapping myself to the under carriage is PITA. Because before the lift no noise and after instant noise that's why I'm like hmm🤔 this is wierd. I'm hoping sway bar issue fixes it if not on to the next fix..

White016

· #8 · Aug 29, 2020

Truefinesse said:
Yeah but In that case it would be a bigger issue like your bushing on the steering rack itself. But after putting a lift and instantly getting a knock after is a coincidence. I know it's something tapping somewhere but to locate it with out strapping myself to the under carriage is PITA. Because before the lift no noise and after instant noise that's why I'm like hmm🤔 this is wierd. I'm hoping sway bar issue fixes it if not on to the next fix..

Hopefully it is the sway bar. How about strapping someone else under there??

Truefinesse

Discussion Starter · #9 · Aug 29, 2020

White016 said:
Hopefully it is the sway bar. How about strapping someone else under there??

😂 Yupp I might do the phone strap down by the sway bar and go over slow dirt trail by my house. Because it only happens when causing the the suspension to flex and turning the wheel. It never happens on pavement, speed bumps, or dirt roads, washboards.Thats why I know it's something alittle different then a firewall bracket or frame bolts. I'm post a few pictures of what my sway bar looks like now. And see what anyone else says too.

Reactions: 1

White016

· #10 · Aug 29, 2020

Truefinesse said:
😂 Yupp I might do the phone strap down by the sway bar and go over slow dirt trail by my house. Because it only happens when causing the the suspension to flex and turning the wheel. It never happens on pavement, speed bumps, or dirt roads, washboards.Thats why I know it's something alittle different then a firewall bracket or frame bolts. I'm post a few pictures of what my sway bar looks like now. And see what anyone else says too.

On that lift isn't there a spacer on the spring, you had to remove it? Maybe you didn't get the spring in it's perch right? Or messed up a rubber isolator in there??

C21964

· #11 · Aug 29, 2020

So this may seem unlikely but in a lot of cases a knocking sound is from the hood snubbers (4) try a little grease on them. I would have sworn mine was suspension related but then read about this on the forum.

Truefinesse

Discussion Starter · #12 · Aug 29, 2020

White016 said:
On that lift isn't there a spacer on the spring, you had to remove it? Maybe you didn't get the spring in it's perch right? Or messed up a rubber isolator in there??

The spring we took our time making sure we torqued it down perches sitting right. Honestly I'm hoping it's not any of that 🤦‍♂️ that will just be basically re doing the whole lift. We re used everything that came off the old suspension and re did it exactly how it came out. And put back in the same as the old one was sitting. Like I said it doesn't sound like a major sound but I'm just hoping its not the spring or perch settings.

Reactions: 1

Truefinesse

Discussion Starter · #13 · Aug 29, 2020

C21964 said:
So this may seem unlikely but in a lot of cases a knocking sound is from the hood snubbers (4) try a little grease on them. I would have sworn mine was suspension related but then read about this on the forum.

I'll have to check it out just the 4 rubbers under the hood itself? And you heard this after a lift or no lift?

C21964

· #14 · Aug 29, 2020

Truefinesse said:
I'll have to check it out just the 4 rubbers under the hood itself? And you heard this after a lift or no lift?

No lift, but only started at about 22,000 miles. Yes the 4 snubbers where they make contact with the underside of the front of the hood.

Truefinesse

Discussion Starter · #15 · Aug 29, 2020

C21964 said:
No lift, but only started at about 22,000 miles. Yes the 4 snubbers where they make contact with the underside of the front of the hood.

Throw some greese on them now when I leave for wood. See how hard the knocking is happening today. 🤦‍♂️

C21964

· #16 · Aug 29, 2020

You did see this Eibach note, right? For MacPherson Strut type front suspension, it is important to mark the orientation of the upper perch with respect to the lower perch before disassembly. This orientation must remain the same with the installation of the Pro Kit springs. Noise may result if this procedure is not performed correctly.
I have the same kit (not installed yet)

Truefinesse

Discussion Starter · #17 · Aug 29, 2020

C21964 said:
You did see this Eibach note, right? For MacPherson Strut type front suspension, it is important to mark the orientation of the upper perch with respect to the lower perch before disassembly. This orientation must remain the same with the installation of the Pro Kit springs. Noise may result if this procedure is not performed correctly.
I have the same kit (not installed yet)

If in correct we don't have a MacPherson strut type setup, correct me if I'm wrong. Think we have double wishbone set up? But don't count me on it.

C21964

· #18 · Aug 29, 2020

Truefinesse said:
If in correct we don't have a MacPherson strut type setup, correct me if I'm wrong. Think we have double wishbone set up? But don't count me on it.

Doh! yes you are correct of course I was just focused on the spring orientation and got that wrong

White016

· #19 · Aug 29, 2020

Truefinesse said:
If in correct we don't have a MacPherson strut type setup, correct me if I'm wrong. Think we have double wishbone set up? But don't count me on it.

Technically we don't but it wouldn't surprise me if anyone described our 'shock in spring' as MacPherson. But sounds like you got the spring right anyway.
I take that back, Eibach wouldn't do that??

Truefinesse

Discussion Starter · #20 · Aug 29, 2020

C21964 said:
Doh! yes you are correct of course I was just focused on the spring orientation and got that wrong

Still be on the safe side when I did my lift we took pictures and made sure they went back in the exact same way as they came out😂. That's just me being paranoid in the first place.. But I'm grease my hood rivets or whatever. I should get my sway bar relocation kit Monday as well as kinks and try that out. But I'm not going to give up just yet. We oat alot of money for these truck and accessories to except defeat!

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