follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum - FT86CLUB > Technical Topics > Suspension | Chassis | Brakes -- Sponsored by 949 Racing

Suspension | Chassis | Brakes -- Sponsored by 949 Racing Relating to suspension, chassis, and brakes. Sponsored by 949 Racing.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-20-2020, 03:21 PM   #1
Ohio Enthusiast
Senior Member
 
Join Date: Apr 2020
Drives: 2018 BRZ
Location: Dayton, OH
Posts: 230
Thanks: 422
Thanked 148 Times in 87 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Can't fit top front differential bushing inserts (KDT925)

I installed Whiteline differential bushings (KDT925) just now, and couldn't get the top front bushings installed. The instructions say to support the front of the diff, remove the bolts and lower the diff. When I did it the diff barely lowered by half an inch, and even prying it with a crowbar didn't have significant movement. After that I loosened (but not removed) the rear bolts as well, but the diff still didn't budge.

I ended up installing all the bushings in the kit except those front top ones. Bolted everything back, torqued to spec and did a test drive. Everything is great, and the little driveline lash I had remaining after the rear subframe bushings and transmission inserts is now gone, with only minor added NVH.

Did anyone else experience an issue with these bushings? I was hesitant to completely remove the diff bolts (2 front and 3 rear), not knowing at which point I need to support the diff with the bottle jack.
Attached Images
 
Ohio Enthusiast is offline   Reply With Quote
Old 09-20-2020, 03:44 PM   #2
DarkPira7e
No, my car doesn't run
 
DarkPira7e's Avatar
 
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 2,636
Thanks: 1,776
Thanked 2,246 Times in 1,221 Posts
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
I'd recommend unbolting the driveshaft and the rear bolts when doing this
DarkPira7e is offline   Reply With Quote
The Following 2 Users Say Thank You to DarkPira7e For This Useful Post:
new2subaru (09-21-2020), Ohio Enthusiast (09-20-2020)
Old 09-20-2020, 03:53 PM   #3
Ohio Enthusiast
Senior Member
 
Join Date: Apr 2020
Drives: 2018 BRZ
Location: Dayton, OH
Posts: 230
Thanks: 422
Thanked 148 Times in 87 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
At which point should I support the diff? Or it doesn't matter much with the prop shafts still connected?
Ohio Enthusiast is offline   Reply With Quote
Old 09-21-2020, 01:05 AM   #4
euniqe
Junior Member
 
euniqe's Avatar
 
Join Date: Oct 2018
Drives: 2012 Toyota 86 GT
Location: Australia
Posts: 5
Thanks: 0
Thanked 6 Times in 3 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Personally I made the mistake of leaving the car in gear when attempting to lower the diff. I pushed the clutch in, and voila, it lowered instantly.

You should be supporting the diff at all times with a jack or stand or whatever, and only lower it slightly to allow room to insert the bushing inserts. The axles and prop shaft aren't designed to hold the weight of it.
euniqe is offline   Reply With Quote
The Following 2 Users Say Thank You to euniqe For This Useful Post:
Icecreamtruk (10-26-2020), Ohio Enthusiast (09-21-2020)
Old 09-21-2020, 08:49 AM   #5
Ohio Enthusiast
Senior Member
 
Join Date: Apr 2020
Drives: 2018 BRZ
Location: Dayton, OH
Posts: 230
Thanks: 422
Thanked 148 Times in 87 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by euniqe View Post
Personally I made the mistake of leaving the car in gear when attempting to lower the diff. I pushed the clutch in, and voila, it lowered instantly.
Hmm, I'm pretty sure I moved to neutral after jacking the car up, but I may have forgotten. I had the same issue with installing the rear transmission bushing, with the same experience (pushed the clutch in, transmission lowered and bushing went in without a hitch, after fighting it for half an hour). Next time I'm under the car I'll give it a go. Thanks!
Ohio Enthusiast is offline   Reply With Quote
Old 09-22-2020, 01:58 AM   #6
Plumbus
Senior Member
 
Plumbus's Avatar
 
Join Date: Oct 2017
Drives: '17 BRZ PP
Location: Vice City
Posts: 103
Thanks: 276
Thanked 32 Times in 28 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Ohio Enthusiast View Post
Hmm, I'm pretty sure I moved to neutral after jacking the car up, but I may have forgotten. I had the same issue with installing the rear transmission bushing, with the same experience (pushed the clutch in, transmission lowered and bushing went in without a hitch, after fighting it for half an hour). Next time I'm under the car I'll give it a go. Thanks!
Let us know how it goes, I'm doing this mod in the near future as well.
Plumbus is offline   Reply With Quote
Old 09-22-2020, 08:03 AM   #7
skylinekin
Senior Member
 
skylinekin's Avatar
 
Join Date: Jul 2013
Drives: 13 FRS, 15 BRZ, 13 FRS
Location: Ann Arbor, MI
Posts: 344
Thanks: 42
Thanked 65 Times in 45 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
You can always remove the 2 rear bolts in addition to the front bolts and support the whole diff with a jack and lower the whole thing down for more clearance.
skylinekin is offline   Reply With Quote
Old 09-22-2020, 10:55 AM   #8
Ohio Enthusiast
Senior Member
 
Join Date: Apr 2020
Drives: 2018 BRZ
Location: Dayton, OH
Posts: 230
Thanks: 422
Thanked 148 Times in 87 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Plumbus View Post
Let us know how it goes, I'm doing this mod in the near future as well.
Next time I have a chance under the car would probably be in a month or so to switch to winter tires. I'll be sure to report back.
Ohio Enthusiast is offline   Reply With Quote
Old 10-23-2020, 08:00 PM   #9
Ohio Enthusiast
Senior Member
 
Join Date: Apr 2020
Drives: 2018 BRZ
Location: Dayton, OH
Posts: 230
Thanks: 422
Thanked 148 Times in 87 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
@Plumbus - reporting back - I probably had the transmission in gear in my first try. Now I made sure to pop it in neutral before unbolting the 2 front support bolts and lowering the diff on the bottle jack. It wasn't loose enough to compress the bottle jack, but a little levering with the jack's handle dropped the diff a couple of inches without a problem.
Ohio Enthusiast is offline   Reply With Quote
The Following User Says Thank You to Ohio Enthusiast For This Useful Post:
Plumbus (10-23-2020)
Old 10-23-2020, 09:36 PM   #10
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,779
Thanks: 1,716
Thanked 760 Times in 592 Posts
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Lube and stretch. Make it fit.
__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
Old 10-24-2020, 02:09 AM   #11
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,779
Thanks: 1,716
Thanked 760 Times in 592 Posts
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Ohio Enthusiast View Post
@Plumbus - reporting back - I probably had the transmission in gear in my first try. Now I made sure to pop it in neutral before unbolting the 2 front support bolts and lowering the diff on the bottle jack. It wasn't loose enough to compress the bottle jack, but a little levering with the jack's handle dropped the diff a couple of inches without a problem.
I thought you couldnt press the top bushing over the carrier.. I think the urathane shrinks a tad so the inner diameter of the thin bushing will be slightly smaller than the portion of the carrier its supposed to fit over.

If that's where you are at now.. lube and stretch. make it fit.
__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
Old 10-24-2020, 05:52 PM   #12
Ohio Enthusiast
Senior Member
 
Join Date: Apr 2020
Drives: 2018 BRZ
Location: Dayton, OH
Posts: 230
Thanks: 422
Thanked 148 Times in 87 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by solidONE View Post
I thought you couldnt press the top bushing over the carrier.. I think the urathane shrinks a tad so the inner diameter of the thin bushing will be slightly smaller than the portion of the carrier its supposed to fit over.
Yeah, it's not a perfect fit - the inserts basically just sits on top, without the snug fit of other bushing inserts for the car (especially compared to the rear subframe inserts). It does snug up well when tightening (as per Whiteline's instructions on a crush fit).

BTW, I only had a chance today to test drive the BRZ after putting these bushing in and it made a noticeable difference vs. the rest of the diff inserts. I'm very happy with this kit.

Last edited by Ohio Enthusiast; 10-24-2020 at 09:02 PM.
Ohio Enthusiast is offline   Reply With Quote
The Following User Says Thank You to Ohio Enthusiast For This Useful Post:
solidONE (10-24-2020)
Old 10-24-2020, 08:00 PM   #13
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,779
Thanks: 1,716
Thanked 760 Times in 592 Posts
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Ohio Enthusiast View Post
Yeah, it's not a perfect fit - the inserts basically just sits on top, without the snug fit of other bushing inserts for the car (especially compared to the rear subframe inserts). It does snug up well went tightening (as per Whiteline's instructions on a crush fit).

BTW, I only had a chance today to test drive the BRZ after putting these bushing in and it made a noticeable difference vs. the rest of the diff inserts. I'm very happy with this kit.
Its a very worthy mod.. even on a brand spanking new 86, me thinks.
__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Whiteline Differential cradle inserts ??? Fred Flintstone Suspension | Chassis | Brakes -- Sponsored by 949 Racing 2 11-13-2018 08:47 PM
Whiteline Differential cradle inserts ??? Fred Flintstone Suspension | Chassis | Brakes -- Sponsored by 949 Racing 2 11-12-2018 03:25 PM
Whiteline KDT922 (Subframe Bushing Inserts) Grease - Safe to use on Rubber? eckoflyte Suspension | Chassis | Brakes -- Sponsored by 949 Racing 8 07-14-2018 12:24 PM
FS: Whiteline Differential Bushing Inserts skylinekin Transmission and Driveline 3 05-31-2017 12:21 PM
Whiteline bushing inserts vs. full bushing replacements mhiscott Suspension | Chassis | Brakes -- Sponsored by 949 Racing 7 12-15-2015 12:45 PM


All times are GMT -4. The time now is 11:04 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.