2017 Silverado 377, tsp stg 2 cam, 8l90 circle D triple disk torque converter 3200 stall, unlocked TCM.
I need a little help here transmission not engaging 1st gear until around 1400 rpm. Upshifts and downshifts seem to be normal however
upshifts from 5th to 8th are a little early at part throttle, but the main concern is when starting off from a stop there is no forward movement until the rpms are brought up to around 1400 then she will begin to move. It doesn't slam into gear though its more like there just isn't enough RPM or torque down low to keep engaged.
Can anyone tell me what I may be overlooking or totally missing?
any help is very much appreciated, Thanks