Upgrade from 727 to 42RH is nearly there. I have found out that the stall of the converter currently fitted to my 42RH is 2300.
The car is geared for 130MPH at 5000 RPM, so 26MPH per 1000, 2000RPM at 52MPH. If overdrive comes in at 55MPH and lockup around 65MPH, then driving on main roads at...