DaveBr
04-03-2011, 21:29
Ever since I installed a used SSD ECM I have an annoying issue. Under average acceleration the tranny shifts fine untill it hits fourth. As soon as it hits fourth it automatically goes into lockup for a split second. Then it immediately realizes that this is not supposed to happen as the speed is to low and comes out of lockup. As speed increases it goes into lockup as it should. This is an annoying situation. Under heavy acceleration every thing seems to work normal. This started as soon as I swapped ECM's. The SSD ECM is from the same year of truck. There is a serious increase in power and everything works fine except for this issue. Any Ideas?