After doing some research, I finally found a good tranny shop to rebuild my 700r4. I told them I wanted them to build it strong and to last long. Well, they did the rebuild for around $1500. They put in all the goodies: super servo, superior shift kit, heavy duty torque converter etc. etc. Here's the problem though: In overdrive, it shifts fine throughout, up and down. However, in regular drive the downshift from 2nd gear to 1st gear is extremely hard, such as when I'm slowing to a stop. Sounds like the whole driveline is about to fall out. Now I've talked to several others that have taken their trucks there for rebuilds and they had nothing but good to say about this place. Mechanic says he's never had this problem before. I'm stumped, he's stumped, and I'm still without my truck. Any ideas?