Strange noises from gearbox after shift kit install.

[SKNOT9]

Hi there. Straight after i installed my transgo stage 2 shift kit there are some very painful sounds coming from my gearbox. It happens when im going up a slight hill, i put my foot down just a little bit to go from 4th to 3rd gear and it makes an awful scraping sound, definately coming from the gearbox., i let off so that it stays in fourth gear and it goes away, i put my foot down a little more and it kicks down without a sound. Is it something to do with the lock up on the torque converter? Has anyone ever had this problem before? nothing came up on the error codes. Please help!

[Eliminator]

if it has to do with the installation of the shift kit maybe its got something to do with the checkball installation, might pay to take the pan off and double check everything is where its suppose to be and intact

[mxmark]

are shift kits any good. Worth it do they wreck your gear box?