For 04.5-07-- This valve controls fluid flow to the converter clutch and reduces main line pressure from 255 PSI to 155 PSI when the converter clutch applies, In the LB7 transmission the TRANSGO® A1-LU-BST valve allow the amount of cut-back to be controlled so that main line stays at up to 190...
I have ran Howes for about a year. All last winter and all summer. I haven't had any issues with gelling or injectors whatsoever. I notice less smoke with the howes also than with PS white or grey. We have been down to 0* and the LBZ fires right up.
We just got 6" of snow in Wyoming and still snowing so I will try it when the roads dry up a little. I can tell my TC is getting weaker with the truck tuned. I guess I will see what happens.
I loaded my stock tune back in the truck yesterday. The first time I have ran stock EVER. I have put 19k mi on the truck since Feb. and has always been tuned. EGT's run a little warmer than lvl 1 and about the same on lvl2 and for sure hotter than lvl 3. Truck still has good power. Kind of...