My stock T-case has always had a problem staying in 4hi and would pop out when i let of the gas. Now I only have 4Low Neutral and 2 HI. It also makes pretty loud whuring while its in 4LO. Snow is here and this is inconvenient as F**K. Is this fixable or should I throw one in from the Junk yard? And if so, is there a better replacement for the BW?