700r4 problems after rebuild. please help

[Hayes904]

Hey y'all, I'm new to the site but I had a 700r4 with the auxiliary valve body rebuilt buy a friend of the familly who has built many without any problems what so ever. This is the second time he's built this tranny and it has the same problem it did the last time he rebuilt it. And yes the t.v. cable is adjusted correctly haha. But when you take off normally the shifts are very very weak and you have to let out of the throttle to get it to go in overdrive but the weird thing is if I put it down in first and manually shift it it will bark 2nd and go in 3 like normally. The only thing he hasn't replaced in the trannyis the govoner. He put a Corvette servo all new clutches new performance band new drum new t.v cable new lip seals. New gears in the front pump which he says rarly go bad. Also the throttle is hard to mash down if that tells you anything. Any help y'all can give me would be much appritiated. Thanks, John
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