We've had one for about 5 years and have been happy with it. Rated at 145hp, ours is sitting at 175hp. The TM175-190 were a short term answer to bridge the gap when they dropped the 8670-8970. The only issue I have with the tractor is at 175hp, it can be a bit light at times when pulling tillage equipment.
Whats been going wrong on yours?