I am just looking for some input. My truck has a Turbo 400 in it that leaks like a drunken Irishman. I have a guy looking at it from the tranny shop in the spring. He does have two transmissions a 400 and a 700r4. If I get the 400 in the future I would be getting the Advance Adapters overdrive units. Would it be worth it to just get the 700 and be done with the 400. The truck has a Chevy 350 that is putting out about 310 - 330 hp and I do not see going much higher.

you will definitly want the Turbo 400 because the 700R4 in our Tahoe will barely handle the 290HP, give or take, that it makes.

what are doing with the truck hiway, towing, city driving
700r4 is a good hiway trans. for towing I have a 400 in my truck

Ya I do a lot of towing mostly. I just had some questions about the durability of the 700. My tranny guy had the transmission in storage and his Co-op student pushed it off the shelf sending it to the ground cracking the case. So the 700 is out. I have been happy with the 400 it is just with 456 rear gears highway is loud with dual exhaust. I toasted a couple of 350's in my old Impala so the 400 has been great for what I need.

the 700r4 is not a good trans for towing

Yeah the since the 700 is gone I am debating going big block in the truck in the future. I have to maybe wait until the Chevelle is done though. Thanks for the input Raynutt and Hiboy.