14" Rotors touching lower control arms - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pmansfield64 · 02-23-2019, 11:10 AM

Hi, I've installed a Ridetech Streetgrip kit and now trying to install a Wilwood 14" brake kit but the rotors are touching the lower control arm. Any ideas. I also replaced the control arms with a set from LMC. The spindles were in the kit from Ridetech. I need to start a build thread, I'm going with a LT4 / 8L90 from SpeartechThanks in advance.

cornerstone · 02-23-2019, 11:55 AM

Welcome aboard! Yes... please start a build thread! I’ve seen it a common thing to trim the lower control arms for allowing 15” rims to fit without rubbing, but I can’t say that I’ve seen it done because of big brake rotors. I don’t see why it would be a problem.
Brian

**HO455** · 02-23-2019, 08:41 PM

Grind it or heat and beat. Either way will work. The down side of both ways is that nice coating on the control arm will have to be touched up. Grrr!

**AussieinNC** · 02-23-2019, 09:35 PM

LMC lower arms are renowned for being thicker in the lower ball joint mount area causing your contact issue. They work ok with up to 12 " rotors...that's my experience with them....

Would suggest some aftermarket arms rather than grinding on the arm itself...

Anyways...keep safe....

B. W. · 02-24-2019, 12:26 PM

I would "gently" move it with a hammer. You might be able to get a large crescent wrench on it & bend it enough.

pmansfield64 · 02-25-2019, 11:58 AM

Thanks guys, To be safe I've decided to bite the bullet and get Ridetech's strong arms with the coilovers .

**AussieinNC** · 02-25-2019, 01:52 PM

Much safer option...IMO...

fishingjred73 · 11-13-2024, 04:40 PM

Factory 68 control arms with CPP Modular spindles and the Wilwood 14" kit, they rub as well....

GASoline71 · 11-13-2024, 05:57 PM

Grinder time. Aftermarket parts is aftermarket parts. A lot of them need to be "massaged".

Gary

LS short box · 11-14-2024, 05:13 PM

I would put a bunch of masking tape on the lip to protect the paint and use BFH to bend the lip down a bit. You need maybe 1/4" clearance between rotor and the lower a-arm?

Extended Power · 11-23-2024, 10:09 AM

Does anyone make a spindle that would work with the 14” Wilwood kit that doesn’t have a 2.5” drop?
The drop is probably what is causing the contact issue. (Duh...I know)

KQQL IT · 11-23-2024, 11:48 AM

Quote:

Originally Posted by Extended Power

Does anyone make a spindle that would work with the 14” Wilwood kit that doesn’t have a 2.5” drop?
The drop is probably what is causing the contact issue. (Duh...I know)

They told me no.

Extended Power · 11-23-2024, 01:07 PM

Quote:

Originally Posted by KQQL IT

They told me no.

No it's not the drops fault, or no they don't make a spindle that doesn't have the 2.5" drop and works with the 14" brake kit?

72c20customcamper · 11-23-2024, 01:53 PM

Quote:

Originally Posted by Extended Power

No it's not the drops fault, or no they don't make a spindle that doesn't have the 2.5" drop and works with the 14" brake kit?

I would think the rotor would still hit the control arm just mid way not at the outer part of the rotor .

02-23-2019, 11:10 AM	#1
pmansfield64 Registered User Join Date: Sep 2018 Location: Southport, NC Posts: 9	14" Rotors touching lower control arms Hi, I've installed a Ridetech Streetgrip kit and now trying to install a Wilwood 14" brake kit but the rotors are touching the lower control arm. Any ideas. I also replaced the control arms with a set from LMC. The spindles were in the kit from Ridetech. I need to start a build thread, I'm going with a LT4 / 8L90 from SpeartechThanks in advance. Attached Images __________________ 71 C10 SWB

02-23-2019, 11:55 AM	#2
cornerstone Registered User Join Date: Apr 2014 Location: Azle,Texas Posts: 2,248	Re: 14" Rotors touching lower control arms Welcome aboard! Yes... please start a build thread! I’ve seen it a common thing to trim the lower control arms for allowing 15” rims to fit without rubbing, but I can’t say that I’ve seen it done because of big brake rotors. I don’t see why it would be a problem. Brian __________________ Brian 1972 C10, "Loyd", LWB to SWB, 5.3, L83/6L80e, 4:11 Tru Trac, Air Ride, VA, DD, 20" Coys, 4 wheel disc, A quick LS swap turned into a 6 year frame off resto-mod.

02-23-2019, 08:41 PM	#3
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: 14" Rotors touching lower control arms Grind it or heat and beat. Either way will work. The down side of both ways is that nice coating on the control arm will have to be touched up. Grrr! __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

02-23-2019, 09:35 PM	#4
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,204	Re: 14" Rotors touching lower control arms LMC lower arms are renowned for being thicker in the lower ball joint mount area causing your contact issue. They work ok with up to 12 " rotors...that's my experience with them.... Would suggest some aftermarket arms rather than grinding on the arm itself... Anyways...keep safe.... __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

02-24-2019, 12:26 PM	#5
B. W. Registered User Join Date: Nov 2014 Location: Bigfork, Montana Posts: 1,137	Re: 14" Rotors touching lower control arms I would "gently" move it with a hammer. You might be able to get a large crescent wrench on it & bend it enough.

02-25-2019, 11:58 AM	#6
pmansfield64 Registered User Join Date: Sep 2018 Location: Southport, NC Posts: 9	Re: 14" Rotors touching lower control arms Thanks guys, To be safe I've decided to bite the bullet and get Ridetech's strong arms with the coilovers . __________________ 71 C10 SWB

02-25-2019, 01:52 PM	#7
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,204	Re: 14" Rotors touching lower control arms Much safer option...IMO... __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

11-13-2024, 04:40 PM	#8
fishingjred73 Registered User Join Date: May 2007 Location: LOUISIANA Posts: 812	Re: 14" Rotors touching lower control arms Factory 68 control arms with CPP Modular spindles and the Wilwood 14" kit, they rub as well.... Attached Images __________________ James '68 Stepside (ground up in progress) My 68 build thread http://louisianaclassictruckclub.fre...side-t956.html '81 SWB "Pap paw" (Driver) The 81 build thread http://louisianaclassictruckclub.fre...-swb-t960.html Member of www.louisianaclassictruckclub.com https://www.facebook.com/groups/296290610747732/

11-14-2024, 05:13 PM	#10
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,131	Re: 14" Rotors touching lower control arms I would put a bunch of masking tape on the lip to protect the paint and use BFH to bend the lip down a bit. You need maybe 1/4" clearance between rotor and the lower a-arm?

11-23-2024, 10:09 AM	#11
Extended Power Registered User Join Date: Dec 2022 Location: Redcliff, Alberta Posts: 217	Re: 14" Rotors touching lower control arms Does anyone make a spindle that would work with the 14” Wilwood kit that doesn’t have a 2.5” drop? The drop is probably what is causing the contact issue. (Duh...I know) __________________ "If it ain't broken, fix it 'till it is!"



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