Brakes Looking to upgrade or get the most out of what you have stock? All brake discussions go here!

Big brake Caliper Doesn't Line Up Well

Thread Tools
 
Search this Thread
 
Old Oct 1, 2025 | 06:01 PM
  #1  
diablizzard's Avatar
Thread Starter
Member
15 Year Member
iTrader: (8)
 
Joined: Jul 2007
Posts: 358
Likes: 2
From: Waukesha, WI
Car: 86 Camaro Z28
Engine: LT1 200cc Ai heads and cam
Transmission: T56
Axle/Gears: 4.10:1 Zexel Torsen
Big brake Caliper Doesn't Line Up Well

I'll putting together the FSL brake kit from BigbrakeUpgrades. Granted, I bought everything awhile ago and am finally able to bolt the calipers on. The passenger side bolts up properly and has about 1/8" gap from the rotor. The driver side is a different story. The caliper sits too close to the rotor and isn't squared up either. The gap is close to 1/32". I swapped the parts individually from side to side, and the conclusion I'm getting is holes are a combination of drilled too close to the center or not perfectly perpendicular. What do you all think?


Reply
Old Oct 1, 2025 | 07:32 PM
  #2  
diablizzard's Avatar
Thread Starter
Member
15 Year Member
iTrader: (8)
 
Joined: Jul 2007
Posts: 358
Likes: 2
From: Waukesha, WI
Car: 86 Camaro Z28
Engine: LT1 200cc Ai heads and cam
Transmission: T56
Axle/Gears: 4.10:1 Zexel Torsen
Re: Big brake Caliper Doesn't Line Up Well

I'm trying to figure it a solution. I've come to with:
  • Do nothing
  • Get a new steering knuckle
  • Redrill and use thread inserts
  • File the face of where the brackets meets the knuckle, so it's on a slight angle
Reply
Old Oct 1, 2025 | 08:22 PM
  #3  
sofakingdom's Avatar
Supreme Member
20 Year Member
Community Builder
iTrader: (1)
 
Joined: Sep 2005
Posts: 27,819
Likes: 2,406
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Big brake Caliper Doesn't Line Up Well

You've got 1 - 3, butt left out THE FIRST important one.

Step 0: Figure out why it's sideways in the first place, and address THAT ONE PARTICULAR fault, directly. Could be as simple as a chunk of rust somewhere, or as complicated as, you need wheel bearings so your rotor sits straight. That last happened to me just the other day, on a completely other kind of vehicle. I spanked myself vigorously at length after noticing that, almost up to the point at which I began enjoying the spanking, at which point I realized that I was being ... weird ..., and changed out the WB instead.
Reply
Old Oct 1, 2025 | 08:29 PM
  #4  
diablizzard's Avatar
Thread Starter
Member
15 Year Member
iTrader: (8)
 
Joined: Jul 2007
Posts: 358
Likes: 2
From: Waukesha, WI
Car: 86 Camaro Z28
Engine: LT1 200cc Ai heads and cam
Transmission: T56
Axle/Gears: 4.10:1 Zexel Torsen
Re: Big brake Caliper Doesn't Line Up Well

Thank you for the laugh, I needed that.

I have a fresh hub with brand new bearings. I can verify it's tightness and then pull it off to get behind the dust shield. Thank have to happen tomorrow at this point.
Reply
Old Oct 4, 2025 | 07:00 PM
  #5  
diablizzard's Avatar
Thread Starter
Member
15 Year Member
iTrader: (8)
 
Joined: Jul 2007
Posts: 358
Likes: 2
From: Waukesha, WI
Car: 86 Camaro Z28
Engine: LT1 200cc Ai heads and cam
Transmission: T56
Axle/Gears: 4.10:1 Zexel Torsen
Re: Big brake Caliper Doesn't Line Up Well

I finally for time to get in the garage today.
  • Double checked the bearing was tightened properly without noticable play, it's good
  • Took off the dust shield, bolted bracket to knuckle, caliper is still angled
  • Flipped bracket around, caliper still angled
  • Everything looked clean and flat
I'm pretty sure it's the bottom hole that is causing the issues.






Reply
Old Oct 4, 2025 | 08:54 PM
  #6  
TTOP350's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (9)
 
Joined: Oct 2001
Posts: 12,211
Likes: 1,135
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Big brake Caliper Doesn't Line Up Well

Wouldn't be hard to run a flat file over it to check for high spots.
Reply
Old Oct 5, 2025 | 06:01 PM
  #7  
diablizzard's Avatar
Thread Starter
Member
15 Year Member
iTrader: (8)
 
Joined: Jul 2007
Posts: 358
Likes: 2
From: Waukesha, WI
Car: 86 Camaro Z28
Engine: LT1 200cc Ai heads and cam
Transmission: T56
Axle/Gears: 4.10:1 Zexel Torsen
Re: Big brake Caliper Doesn't Line Up Well

I ran the file across the surfaces. The flats on the knuckle were not perfectly flat, but it still isn't the culprit. I'm solidly in the boat of, the bottom hole isn't perpendicular to the plane.
Reply
Old Oct 11, 2025 | 06:55 PM
  #8  
TTOP350's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (9)
 
Joined: Oct 2001
Posts: 12,211
Likes: 1,135
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Big brake Caliper Doesn't Line Up Well

Originally Posted by diablizzard
I ran the file across the surfaces. The flats on the knuckle were not perfectly flat, but it still isn't the culprit. I'm solidly in the boat of, the bottom hole isn't perpendicular to the plane.
Possibly bent from being dropped at some point?
Reply
Old Oct 13, 2025 | 06:38 AM
  #9  
diablizzard's Avatar
Thread Starter
Member
15 Year Member
iTrader: (8)
 
Joined: Jul 2007
Posts: 358
Likes: 2
From: Waukesha, WI
Car: 86 Camaro Z28
Engine: LT1 200cc Ai heads and cam
Transmission: T56
Axle/Gears: 4.10:1 Zexel Torsen
Re: Big brake Caliper Doesn't Line Up Well

Originally Posted by TTOP350
Possibly bent from being dropped at some point?
That's possible too. That puts me in the search for a new to me spindle.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Thirdgen89GTA
NW Indiana and South Chicago Suburb
1
Mar 8, 2024 06:51 PM
rymanrph
Brakes
1
Feb 5, 2024 08:29 AM
johnw999
Brakes
3
Jan 18, 2013 11:27 PM
89transam*pearl
Brakes
3
Jul 31, 2008 05:07 PM
Street Lethal
Brakes
6
May 11, 2008 12:09 PM




All times are GMT -5. The time now is 11:12 PM.