Rebuilt 904 w/ tf2 shifting woes...

Install a accumulator prop and lighten up the governor weight and spring.

Are you shifting it manually. if so you are shifting from low to second. it will hold low and shift softer. In drive it shifts from first to second. A lighter governor will hold the shifts longer.

try pulling out in drive and after the car is rolling then pull it to low. your second gear shift will be crisper. Your shifting from first to second. low and first are different applies

My guess is you still have the accumulator spring installed.