They said they had a customer with 500kw in a 33 drag car for 2 years with no problems. I have the overdrive on a switch and it's a direct replacement for the a box
From what I have found there was only one company doing a trans brake manual valve body but they went broke last year. All 4 speed jatco boxes have an electronic solenoid to engage 4th not activated through the selector
From what I have found the series 3 r31 and r33 has the a series box and the r34 has the b series re box. The b series has more clutches and a stronger box.
If you don't upgrade your auto ie shift kit you will have the same issue in your next one. I suggest you call mv automatics in Adelaide for a solution. Be prepared autos are expensive compared to manuals.
This section is quiet. Thought I might see who else has a rb powered 30.
Mine has a rb25det with the following
Gtx3076r turbo etc
Manualized 4 speed auto
S13 coilovers
R200 diff with quaife centre
Lots of other stuff
What you got?
Auto was sent off today it will be back in 3 weeks to be installed and then some fun. Full manual valve body etc push button overdrive and push button lockup clutch for highway driv