i recently replaced the front axle actuator on my 97 Z-71 with the electric motor upgrade along with the required wiring harness. 4 hi works fine, but when in shift into 4-low, the transmission doesn't want to shift properly. the new wiring harness is spliced into the brown transfer case wire. did i do something wrong, or did i overlook something else? thanks for any replies.

4LO does affect shifting, it should shift at a slower speed. Did you use 4Lo much before the new actuator

My 4 low shifts much slower and much harder than in 2wd or 4 high. always has and if it holds together right always will, thats how it's supposed to be.

yes i've used 4-low before mainly in sand dunes. it's as if the transmission doesn't want to shift out of first gear. it revs to 5,000 and won't shift into second.

Did you cut any wires that did not get reconnected somewhere, possibly the grn/blk wire at the transfer case switch? It sounds like the PCM doesn't know its in low range and operating on the high range shift points as far as speed/throttle position go