so i want to build more horse in my 93 gs300. i have a 1jz chaser motor and trans. i have read that this trans is rated for 450 horse is this true. i doesnt really matter because i want more power then that. so i was thinking of getting a usdm supra tt automatic and building it for the power i am looking for which is the sky is the limit. can this trans be built for horsepower. also will my chaser ecu run shift the trans for me or is it gonna hate it. also eventually i will need an aftermarket ecm and would appreciate any info there.

 

your better off getting a shift kit and stall kit for the trans you have now, both can be built and cooled to handle great amounts of power. as long as they're cooled right

 

problem is my trans now doesnot have a spped sensor for the speedo so it wont work. trust me i would rather stick with what i have but it is real annoying to not have a speedo