I am not responsible for this mod.  It is from another website (as link shows) and has not been tested by myself.  Please take extreme caution when performing this mod and as always, USE THIS INFORMATION AT YOUR OWN RISK.  

http://www.saguenayhosting.com/kane/Supra/NA_to_Turbo_Tach.pdf


This is an attempt to HELP you guys SAVE MONEY when buying the TRD Tach.  From what I have read, it seems that you can buy the NA TRD Tach (~$275 US) and perform this conversion INSTEAD of buying the TT TRD Tach (~$500 US). 

Obviously you can see how it would be nice to just buy the NA TRD Tach and perform this $1 mod to have it reportedly read & function the same as the TT TRD Tach.  Take your time, search for other people's testimonials and KNOW exactly what you are doing before you even attempt this. 

 
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