Transmission Solutions
02-21-2017 | 11:25 AM
#1
Transmission Solutions
I know that some people have swapped in the T56, the 5 spd, and FD transmissions, as well as the gear-set from the Australian company. What I'm wondering about is what exactly fails in our transmissions in the 350~400 HP range? A friend of mine suspected it was the input shaft gear. Has anyone taken apart one that died from high horsepower and identified the weak points?
I'm trying to avoid a $6k gear-set if I can have a couple parts made at a local machine shop for less.
I'm trying to avoid a $6k gear-set if I can have a couple parts made at a local machine shop for less.
02-21-2017 | 02:42 PM
#2
Mine spun teeth off 4th Gear going up a hill...
I wouldn't even try and fix a 6 speed...if you are going to play around go to the 5 speed RX-8 box or an FD box ( basically the same inside)
So far mine is holding up to 450 WHP road course. Drag launches and things will break for sure
I wouldn't even try and fix a 6 speed...if you are going to play around go to the 5 speed RX-8 box or an FD box ( basically the same inside)
So far mine is holding up to 450 WHP road course. Drag launches and things will break for sure
02-22-2017 | 12:06 PM
#4
02-22-2017 | 12:44 PM
#5
My 6 speed trans never failed with 325whp going through it for 100,000kms . But I never did any drag launches or burnouts .
The rx8 5 speed trans I have now seems fine as well at closer to 400whp. The syncros fail on these from abuse more than from 400 plus whp.
The rx8 5 speed trans I have now seems fine as well at closer to 400whp. The syncros fail on these from abuse more than from 400 plus whp.
02-22-2017 | 05:05 PM
#6
I think if you are careful the 6 speed is good for 325 to 350
Mine died quickly with slicks at 450....
So far the 5 speed is working great.... I was thinking about going to a T56 based unit...but they really shift like a truck
Mine died quickly with slicks at 450....
So far the 5 speed is working great.... I was thinking about going to a T56 based unit...but they really shift like a truck
03-02-2017 | 07:28 AM
#7
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Joined: Jan 2010
Posts: 303
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From: On some other planet or Surrey, UK
Some people prefer the S2 6-speed MT both S1 MTs. I find this strange as over here in the UK the S2 6-speed MT is seen as relatively fragile; however, this may be because people are assuming there is a general issue from complaints over the inadequate 5th & 6th gear synchros on earlier R3s.
As an aside, over here in the UK there are plenty of the better-spec 5-speed transmissions to use in a turbo swap if/when the 6-speed transmission breaks. That, I suppose, is some consolation over the extra issues we have trying to plumb a turbo around out RHD steering column.
As an aside, over here in the UK there are plenty of the better-spec 5-speed transmissions to use in a turbo swap if/when the 6-speed transmission breaks. That, I suppose, is some consolation over the extra issues we have trying to plumb a turbo around out RHD steering column.