All I can say is WOW!
TCC lockup switch. Latest mixed tank fill netted 30.2mpg up from an average of 24. I can hardly believe it but there it is. Also got a record tank distance of 818km/508mi.
That's almost a 26% improvement. It may settle down a bit on the next tank but we will see. I doubt most people would get the same improvement because I live in a very hilly area where the slushbox was labouring up these hills at low speed, high RPM and I could never get into OD. Now I cruise the flats at 30-35 locked up in OD and do most of those hills locked up in 3rd or OD.
30mpg combined! So happy!
Thread is here:
Freezing the Slushbox. Torque Converter on-demand lockup switch.