Diff raiser bushes - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

R2R · 09-25-2020, 10:27 AM

Seems a common failure in our championship to break the driveshaft (once or twice a season), and while reading online one of the issue may be the wrong angles of the diff.
Seems that diff riser bushes may be a solution, but I'm surprised this is not a very common mod.
Will this stress the prop shaft more? especially since we have an invidia aluminium single piece shaft.

Thanks for the feedback

churchx · 09-25-2020, 10:43 AM

diff riser will help for overlowered cars .. but more for CV bearings, not driveshaft. They will do so by reducing back to lesser angle, and thus load/wear on those bearings.
imho, if driveshafts fail, it might be due different reason, eg. grippy tires paired with too high power forced induction build w/o strengthening apropriately all other drivetrain components ..

DarkPira7e · 09-25-2020, 10:52 AM

I don't think the yoke on the propshaft would be affected by that slight angle change. This should help the axles, but there are also upgraded axles available if the issue is simply poor tensile strength leading to breaks

09-25-2020, 10:27 AM	#1
R2R Junior Member Join Date: Jul 2020 Drives: GT86 TRD CUP Location: UAE Posts: 9 Thanks: 0 Thanked 3 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Diff raiser bushes Seems a common failure in our championship to break the driveshaft (once or twice a season), and while reading online one of the issue may be the wrong angles of the diff. Seems that diff riser bushes may be a solution, but I'm surprised this is not a very common mod. Will this stress the prop shaft more? especially since we have an invidia aluminium single piece shaft. Thanks for the feedback

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Are aftermarket diff bushes really necessary?	Purist	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	29	08-26-2020 10:31 AM
soft diff bushes?	notout86	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	38	05-30-2018 11:37 PM
Any idea where these bushes go?	Captain Snooze	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	8	04-06-2015 01:12 PM
Valley 86 Fund Raiser for typhoon haiyan	lfuentes92	Southern California	0	11-18-2013 02:18 AM
HighSchool Fund Raiser! YYC (Off topic) for a good cause!	TheProspect	CANADA	2	04-22-2013 12:17 AM

09-25-2020, 10:43 AM	#2
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,333 Thanks: 696 Thanked 2,085 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	diff riser will help for overlowered cars .. but more for CV bearings, not driveshaft. They will do so by reducing back to lesser angle, and thus load/wear on those bearings. imho, if driveshafts fail, it might be due different reason, eg. grippy tires paired with too high power forced induction build w/o strengthening apropriately all other drivetrain components ..

09-25-2020, 10:52 AM	#3
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,932 Thanks: 3,199 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	I don't think the yoke on the propshaft would be affected by that slight angle change. This should help the axles, but there are also upgraded axles available if the issue is simply poor tensile strength leading to breaks

User Name		Remember Me?
Password