Front disc brake rotors & caliper fitment - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 31 Old 11-03-2009, 08:37 PM Thread Starter
Mean Max
Don't poke the bear
 
Mean Max's Avatar
1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 13,734
Front disc brake rotors & caliper fitment

While at Bennett Auto Supply today I took some pictures & collected some brake information that may help avoid any confusion when it comes time to purchase brake parts for your YJ.

Here are the different YJ brake rotors & calipers available for YJs, including the year break information.

Here is a front brake rotor for '87-'89 YJs. Notice that it's a solid rotor & the "hat" measurement is just shy of 3 inches. They are the same left to right.



Here are the calipers for the '87-'89 YJs that use the rotor listed above.
FR4181 = Passenger side caliper
FR4182 = Driver side caliper
Notice that the brake line fitting is located to the side of the piston, facing the axle shaft.



Here is a front brake rotor for '90-'95 YJs. Notice that it's a ventilated rotor & the "hat" measurement exceeds 3 inches. They are the same left to right.



Here are the calipers for the '90-'95 YJs that use the rotor listed above.
FR4339 = Passenger side caliper
FR4340 = Driver side caliper
Notice that the brake line fitting is located facing the top of the piston, facing inward toward the frame.




With regard to purchasing calipers, you may be asked if you want "calipers only" or "semi-loaded" or "fully-loaded" at the time of purchase. Here is what that means.
Calipers only = Usually just the calipers with a bleeder screw & not much if anything else
Semi-loaded = Usually includes mounting pins, anti-rattle clips, bleeder screw, and copper sealing rings for the brake line fitting
Fully-loaded = Includes all of the above, and brake pads.

Max



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Quote:
Originally Posted by UltimatE View Post
Max has a picture of every Jeep part ever made.
Quote:
Originally Posted by Benderff View Post
No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

There is no situation that cannot be improved with a small but well-placed explosive.
Mean Max is offline  
Sponsored Links
Advertisement
 
post #2 of 31 Old 11-03-2009, 08:41 PM
shaggyjim
Cautiously Optimistic!
 
shaggyjim's Avatar
1992 YJ Wrangler 
 
Join Date: Nov 2008
Location: Grand Junction
Posts: 1,544
Whats with all the holes in the first one Max?

Jim...

"That's more fun than watching a hippie get mauled by a bear!"
shaggyjim is online now  
post #3 of 31 Old 11-03-2009, 08:46 PM Thread Starter
Mean Max
Don't poke the bear
 
Mean Max's Avatar
1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 13,734
I really don't know Jim. I have seen them like that in the past, but never with any apparent reason for the holes.

Good question!

Anybody know?

Max


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Quote:
Originally Posted by UltimatE View Post
Max has a picture of every Jeep part ever made.
Quote:
Originally Posted by Benderff View Post
No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

There is no situation that cannot be improved with a small but well-placed explosive.
Mean Max is offline  
post #4 of 31 Old 11-03-2009, 08:50 PM
shaggyjim
Cautiously Optimistic!
 
shaggyjim's Avatar
1992 YJ Wrangler 
 
Join Date: Nov 2008
Location: Grand Junction
Posts: 1,544
Well Max I guess if you dont vent the rotor you might as well vent the hat!

Jim...

"That's more fun than watching a hippie get mauled by a bear!"
shaggyjim is online now  
post #5 of 31 Old 11-04-2009, 09:27 AM
YJake
Registered User
1991 YJ Wrangler 
 
Join Date: Jun 2008
Location: Orlando, FL
Posts: 2,198
Mine don't have any extra holes anywhere

I also believe that I still have the stock rotors

Good info Max!

/l , [____],
l---L--[]lllllll[]-_
()_) ()_)==@=)_)

Quote:
Originally Posted by clemsonfan16 View Post
The 4banger only whines because it wants more!
Quote:
Originally Posted by Opihi59 View Post
3 Things to know about the forum: Always PB blaster, Always check the FAQ, Always do a search, and if none of that works, ask Mean Max.
YJake is offline  
post #6 of 31 Old 06-19-2010, 04:01 PM
RikRotorhead
Registered User
1988 YJ Wrangler 
 
Join Date: Aug 2008
Location: SloCal
Posts: 8,980
I need to expand on this info, sorry Max, good thread tho'.

I have an '88 Wrangler stock axle from my six banger with 3:55's.
Next to it I have a '95 Wrangler stock axle from a four banger with 4:11's.
I intended to buy new rotors and loaded calipers with pads for the '95 axle before I put it back in.
I called the local AutoZone and the guy on the phone was pretty knowledgeable about brakes.
He brought up all the part numbers and they are totally different as you stated.
However, my '88 is different than the pics you posted above about the '87-'89.

First, the brake caliper bracket is different. On the ''95 it's molded to the carrier, and on the '88 it's a separate bolt on piece.
Second, the glide pins are a different size between the two also. Different size thread into the hole, but the same shaft size.
Third, the axle flange on the end that holds the lugs on the '95 is larger in diameter.
Fourth, the pads are a bit wider on the '95.
Fifth, my '88 has a vented rotor and the hat is exactly three inches to the top.
Sixth, the '88 caliper has the inlet on the bottom and the bleeder is on the top, both inward toward the center of the axle.
I have included pics for your viewing pleasure. I don't have the parts for the '95 brakes yet, but the guy at AutoZone said I could use the '88 parts for exchange for the '95 parts as cores.

AutoZone's prices:
$10 for the four glider bolts
$52 for the two rotors
$63 for the two loaded calipers
$125 plus tax

Rik.
Attached Thumbnails
IMG_1747 (Medium).JPG   IMG_1746 (Medium).JPG   IMG_1744 (Medium).JPG   IMG_1743 (Medium).JPG  

Betcha' wish your girlfriend was as dirty as my Jeep!
Zombies hate fast food.
Hang on! This is gunna' be a thrill ride of geriatric proportion!
RJC#512
RikRotorhead is offline  
post #7 of 31 Old 06-19-2010, 04:09 PM Thread Starter
Mean Max
Don't poke the bear
 
Mean Max's Avatar
1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 13,734
Good info Rik, and thanks for the pics!

The calipers I listed for your '88 look the same as the ones in your pic, but the rotors are not. I ran into this scenario also since the thread was written, but I failed to get pics to update it.

The part numbers I listed are probably specific to the brand my local parts house uses, so I don't doubt that you found them differently elsewhere.

Please post up some pics of the new parts when you have them in hand!

Max


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Quote:
Originally Posted by UltimatE View Post
Max has a picture of every Jeep part ever made.
Quote:
Originally Posted by Benderff View Post
No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

There is no situation that cannot be improved with a small but well-placed explosive.
Mean Max is offline  
post #8 of 31 Old 06-19-2010, 04:54 PM
RikRotorhead
Registered User
1988 YJ Wrangler 
 
Join Date: Aug 2008
Location: SloCal
Posts: 8,980
Quote:
Originally Posted by Mean Max View Post
Good info Rik, and thanks for the pics!

The calipers I listed for your '88 look the same as the ones in your pic, but the rotors are not. I ran into this scenario also since the thread was written, but I failed to get pics to update it.

The part numbers I listed are probably specific to the brand my local parts house uses, so I don't doubt that you found them differently elsewhere.

Please post up some pics of the new parts when you have them in hand!

Max

Will do. I should be getting the parts by Wednesday. They didn't have the loaded calipers in stock. So there it sits on stands.
I'm going to go ahead and remove the rear axle and prep my 8.8 while I wait. Still need to install the SYE too. I'm glad I have a nice garage with beer in the fridge and music to keep me company.

Betcha' wish your girlfriend was as dirty as my Jeep!
Zombies hate fast food.
Hang on! This is gunna' be a thrill ride of geriatric proportion!
RJC#512
RikRotorhead is offline  
post #9 of 31 Old 07-25-2010, 04:10 AM
squeethebee
Registered User
1993 YJ Wrangler 
 
Join Date: Jul 2010
Location: shelburne, ma
Posts: 4
Hey, you guys seem pretty knowledgeable about calipers, so I pose you this question about the brake job from hell...

While working on my friends 93 YJ, one of the caliper seals was blown, so I bought a new caliper from autozone for like 25 bucks or something and received one of the ones pictured above:



The problem I have is that the threads on the bolts meant to hold it to the bracket are just too darn small, and slide right in and out of the threaded area on the caliper bracket!!

I snagged a couple of pics of the caliper on the other side with the hopes that you would be able to tell me which caliper I should have bought, since I cannot figure out what it's from, and hopefully get the right one on Monday.

The one on the passenger side:






It has "7345" and "W4" cast into it, if that helps. The Jeep also has what I take to be a Mile Marker manual locking hub conversion kit, so perhaps a different caliper was spec'd for that swap?

Any help is GREATLY appreciated so I can finish this up, been 4 awful days so far, lol. Thanks.

ed
squeethebee is offline  
post #10 of 31 Old 07-25-2010, 12:42 PM
squeethebee
Registered User
1993 YJ Wrangler 
 
Join Date: Jul 2010
Location: shelburne, ma
Posts: 4
Anybody? I have tried asking the owner, but she really doesn't remember exactly what is done to the rig.

ed
squeethebee is offline  
post #11 of 31 Old 07-25-2010, 03:15 PM
RikRotorhead
Registered User
1988 YJ Wrangler 
 
Join Date: Aug 2008
Location: SloCal
Posts: 8,980
Someone along the line swapped in a different year front axle?

I'm not sure which bolts you speak of. You mean the glide bolts?
'87, '88, and '89 were one size, and in '90 they went to a different size glider bolt. The calipers are a different size and so are the pads and hoses when they changed.

Betcha' wish your girlfriend was as dirty as my Jeep!
Zombies hate fast food.
Hang on! This is gunna' be a thrill ride of geriatric proportion!
RJC#512
RikRotorhead is offline  
post #12 of 31 Old 07-25-2010, 03:19 PM
RikRotorhead
Registered User
1988 YJ Wrangler 
 
Join Date: Aug 2008
Location: SloCal
Posts: 8,980
OK....
Look at this pic. See where the brake line goes in? It's on the bottom (upside down in this pic).
This is out of the early axle ('88).




Now yours. Same place. Just flip the picture over....




And what you bought is on the side, as in the newer style....
See where the line goes? (orange cap)



So head back to the auto parts store and purchase the same stuff except for an '88 Wrangler, problem solved.

Betcha' wish your girlfriend was as dirty as my Jeep!
Zombies hate fast food.
Hang on! This is gunna' be a thrill ride of geriatric proportion!
RJC#512
RikRotorhead is offline  
post #13 of 31 Old 07-25-2010, 08:39 PM
squeethebee
Registered User
1993 YJ Wrangler 
 
Join Date: Jul 2010
Location: shelburne, ma
Posts: 4


I really didn't see it because in the picture the caliper was upside down! And I read the post too!! Thank you guy, I will hopefully be able to finish this up on Monday now after a quick trip to the parts store.

If I were closer to Cali, I'd buy you a beer. I will let you guys know how it works out in a day or two, and if you ever have any questions about 93-07 Subarus, you just let me know

Oh, and I was talking about the bolts that actually hold the caliper to the bracket!

ed
squeethebee is offline  
post #14 of 31 Old 07-25-2010, 09:46 PM
Louie4
Jeep Enjuneering
 
Louie4's Avatar
1993 YJ Wrangler 
 
Join Date: Aug 2008
Location: Raleigh
Posts: 10,822
Max should I get those anti-rattle clips? I've never had them but I noticed that someone else had them in another thread.

Lou

I have a jeep...and it is modified...I win.

YJOTM July 2012
YJOTM February 2014


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Louie4 is offline  
post #15 of 31 Old 07-25-2010, 11:59 PM
RikRotorhead
Registered User
1988 YJ Wrangler 
 
Join Date: Aug 2008
Location: SloCal
Posts: 8,980
Quote:
Originally Posted by squeethebee View Post


I really didn't see it because in the picture the caliper was upside down! And I read the post too!! Thank you guy, I will hopefully be able to finish this up on Monday now after a quick trip to the parts store.

If I were closer to Cali, I'd buy you a beer. I will let you guys know how it works out in a day or two, and if you ever have any questions about 93-07 Subarus, you just let me know

Oh, and I was talking about the bolts that actually hold the caliper to the bracket!

ed
No problem at all. Glad to help.
Altho' a beer sound's good right now.

Betcha' wish your girlfriend was as dirty as my Jeep!
Zombies hate fast food.
Hang on! This is gunna' be a thrill ride of geriatric proportion!
RJC#512
RikRotorhead is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Disc brake rotors/o2 sensor-cat recall letters SDGBASSE YJ Wrangler Technical Forum 1 10-08-2009 11:10 PM
Front brake caliper pin torque? grandkodiak TJ Wrangler Technical Forum 3 09-27-2009 06:13 PM
front right brake caliper locking up got_4_lo YJ Wrangler Technical Forum 14 11-25-2007 10:12 AM
Replace one front brake caliper or both? Woodyhfd TJ Wrangler Technical Forum 7 01-13-2007 10:04 PM
Brake Disc / Caliper Upgrade Options Bos TJ Wrangler Technical Forum 9 07-02-2004 06:51 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome