Timer

All can be done from front but enough access to rear is needed just to get to 3 screws.
First remove knobs (one has a plastic hair pin keeper. remove with needle nose pliers. Then remove outer ring knob by prying gently.
Remove 3 screws in back to release front panel. Slide panel an inch to the right to release the plastic tabs. Panel lays down. One screw holds the timer. Remove then turn timer 1/8 turn to release from plastic ears. Unplug the one multiple conductor plug. (Pry to start with screwdriver but note the lock latch, pry it slightly to release).
Mount new timer by reversing above. The kit had a cardboard guard which didn't fit but we mounted slightly below timer and it served whatever purpose it had. (Original had none)
Plug the cable (fits the same as old timer). Replace panel but matchng those plastic slots and move an inch to the left to lock in place. Put panel back into position but don't put 3 screws in until tested. Push on knob, Put keeper hairpin onto knob and push it on. (We ordered new knob online, plastic wears). Try part of a cycle just to see if anything happens. A few seconds is enough. Replace back 3 screws. Brag to wife or hubby or anyone who will listen.