545rfe won't shift out of 1st

Just got the car (70 Dart) back from upholstery and went out to alighn the front end. Car won't shift out of 1st gear. Gen3 hemi, 545rfe transmission. Car is fresh, zero miles. Engine and transmission are new, crate package. Thoughts anyone? Car acts like it's in the limp mode. Other problem is I've lost the tach signal. Does the 545 need the RPM signal to shift? Or does the transmission need to be "flashed"?