Here is a little some thing I wrote up for some one else.
Remember, take anything anyone says with a grain of salt. study, study, and then study some more before dumping that kind of cash into somthing this complex.
Installer, Installer, Installer, all the products are great but they aren't worth any thing unless you have a good installer or can do it yourself. There is a lot more to fine tuning these aftermarket transmissions than just installing some parts.
My experience:
1. If you are going to do engine power enhancements that increase HP more than 60 HP than It is advisable to upgrade the transmission with a Torque converter and Modified Valve Body, I also recommend a pressure lock from BD along with who's ever upgrades you go with, this is advisable towing or none towing.
2. If you are going to the extreme HP's of approximately over 350HP to unlimited rear wheel HP than I would recommend an exchange transmission with the upgraded internal parts, most all exchange transmissions come with the parts listed in #1 but it doesn't hurt to ask just to make sure. If you can do transmission work on your own than you could get by a lot cheaper as no labor would be involved. With an upgraded transmission you should be able to tow in OD, be it an exchange (which is better) or just upgrade with TC, valve Body, and pressure lock.
As far as whose parts you use, I really have no preference, my setup works really well but others have good parts too. I will list in preference what I would do if I had to do it again, the only reason I list bd-power fourth is I have already used their parts and am very happy with them but I would like to try somebody else's, keep in mind if this BD transmission goes more than say 200,000+ miles it would be mighty hard to go with some one else as this would already have been a proven setup.
www.atsdieselperformance.com
www.suncoastconverters.com
www.gbtransmission.com
www.bd-power.com This is my setup and very good.
I should explain why I think bd's setup is very good.
There is a stretch of road we travel every weekend that is 70 miles long and we have to stop or slow down and turn 9 times within that 70 mile stretch. On the return trip we do the same thing. That's like stopping every 7. 8 miles and racing nine times, Add in the return trip and in 140 miles we stop and race every 7. 8 miles for 18 times. A lot of people on the TDR claim there transmission will hold up to all kinds of HP while racing, but the abuse I put mine through is nothing compared to them, Why, because I go from 0 to 65 MPH with my foot close to the floor using 300+ RWHP pulling 21,000 to 22,000 pounds in tow. These guys racing with High HP are not towing anything and I doubt they race 18 times a weekend.
I buy all my own parts, I am not affiliated or sponsored by anyone or any company. I buy what I feel is best for me from who ever I want, when I can scrounge enough money together.
Hope this helps,
Ron