How Much Power can A MY06 STI GEARBOX take
Hello
I have a few Questions about The TY856WG7KA gearbox as fitted in the STI TYPE UK MY06 ( I believe this might be the exact same gearbox as fitted to the JDM Subaru STI forester) and would appreciate some input from Experienced individuals :) 1.How much power and torque can the Stock TY856WG7KA Gearbox take ? what changes were made to strengthen it from the Blobeye STI ? 2.How did the internals change on the UK 2006 STI WRX and the UK 2007 STI WRX ? and the USDM DW-TY856ww7ma and DW-TY856ww8ma Gearboxes of the same year 3.Were the Syncros ,input shafts and internals strengthen between these two years and if so how ? 4.i have seen USDM STI MY07 RUN 900+ BHP on stock Gearboxes can the TY856WG7KA handle this much power ? The SPECS On this TY856WG7KA Gearbox are btw 1st = 3.636:1 2nd = 2.235 3rd = 1.521 4th = 1.137 5th =0.891 6th = 0.707 Final Drive Ratio 3.900 Thank you |
I have a few Questions about The TY856WG7KA gearbox as fitted in the STI TYPE UK MY06 ( I believe this might be the exact same gearbox as fitted to the JDM Subaru STI forester) Revision C - TY856WL4CC Revision D - TY856WL7CC Revision E - TY856WL7CC Revision F - TY856WL8CD |
US BHP and UK BHP are different things, so bear that in mind.
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Originally Posted by R34GTR
(Post 12054294)
Hello
I have a few Questions about The TY856WG7KA gearbox as fitted in the STI TYPE UK MY06 ( I believe this might be the exact same gearbox as fitted to the JDM Subaru STI forester) and would appreciate some input from Experienced individuals :) 1.How much power and torque can the Stock TY856WG7KA Gearbox take ? what changes were made to strengthen it from the Blobeye STI ? 2.How did the internals change on the UK 2006 STI WRX and the UK 2007 STI WRX ? and the USDM DW-TY856ww7ma and DW-TY856ww8ma Gearboxes of the same year 3.Were the Syncros ,input shafts and internals strengthen between these two years and if so how ? 4.i have seen USDM STI MY07 RUN 900+ BHP on stock Gearboxes can the TY856WG7KA handle this much power ?https://www.youtube.com/watch?v=M7nWwW_jH3k 5. does the TY856WG7KA suffer from High RPM LOCKOUT at 9k RPM + I know the USDM STI Gearbox does not look at this at 12 min 07 https://www.youtube.com/watch?v=9SRtJa6jITo The SPECS On this TY856WG7KA Gearbox are btw 1st = 3.636:1 2nd = 2.235 3rd = 1.521 4th = 1.137 5th =0.891 6th = 0.707 Final Drive Ratio 3.900 Thank you The ratios your listing are from the Forester sti and later spec b Legacy's https://www.rallispec.com/gea_syn_rstf145_t.html '07 6 speed had carbon coated baulk rings: https://www.importcarparts.co.uk/par...y=&searchPart= No internal pump in the '07 six speeds. |
Great Info:thumb:
Thank you to Don Clark ,Tidgy and 2Pot for your Input . very helpful and thanks for the contacts and references . We also found this link https://forums.nasioc.com/forums/sho....php?t=1611975 Having Read the pages It suggests The Following about the 2006 STI 6 Speed Gearboxes *The 06 Gearbox is better for race applications as it has the Internal oil Pump (as mentioned by 2 pot) as opposed to scrapers, so the 2006 model will greatly reduce the chances of Gearbox lockout Due to heatsoak and having the Oil Pump will also aid Cooling and reduce the chances of damage to the gearbox Syncros caused by the Gearbox oil Overheating and Thinning . *This Subaru gearbox Was said in the post to be Designed by PORSCHE for SUBARU but this cant be verified https://forums.nasioc.com/forums/sho...mission+design *The oil pump for the gearbox was removed in the 2007 Model STI's for cost saving purposes ,although it has been suggested that there was a problem with the earlier(2003-2004) 6 Speed Gearboxes as the oil pump Shaft would break and there was a recall for this item. *The Gearbox on the 2007 model is meant to have a wider keyway on 3rd gear (Hope its not because the 2006 suffered breakages on the Gear ) Whats the Highest BHP and Torque you have Seen on the 2006 Gearbox as fitted to my car namely The TY856WG7KA gearbox? There must be some Drag Racers and TOTB Runners in here ? |
Originally Posted by Don Clark
(Post 12054300)
Forester STi gearbox codes
Revision C - TY856WL4CC Revision D - TY856WL7CC Revision E - TY856WL7CC Revision F - TY856WL8CD SUBARU WRX STI 9 MY06 DATA -GEAR RATIOS |
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