hookoo1969

Bought a TH350 and was told it is stuck in low. Guy said it felt as it had a transbrake on in low gear.....all other gears seem normal and was recently rebuilt. I started at the valve body and didn't see anything unusual but the intermediate servo piston/rod was installed incorrectly. The rod retaining ring was outside the piston instead of being under the piston near the transmission body. Would this cause low to lock up? Thanks for any input.