Re: Converter Lock-up

Posted by Ross On 2012/1/5 13:06:19

A slight creep when revving the engine in neutral or park is not unusual, especially when the fluid is cold, but it is still a good idea to check the band adjustment. The creep is just fluid drag on the multiple discs of the high clutch.

Band adjustment will not however have the faintest effect on whether the trans will do its lockup or not. That is a completely distinct hydraulic circuit-the reason that Ultras will also lock their convertors in L range.

I am surprised that you can not feel a difference between L and H on takeoff as there is quite a bit more torque available; am also wondering that the engine sounds so busy at 45. I wonder if you are getting high at all. In which case I would carefully check the 5/16" adjustment where the shifter valve enters the valvebody. On these 49-54 Ultras the detents are MEANINGLESS unless that adjustment is correct. A problem there will rob you of high and of lockup.