TURBO 400 shutter ISSUES

[JFORRESTERSR]

So if anyone is following my journey they know I have had several issues with my trans and trans guy. We have worked though most of them and with the help of this board and its knowledgeable members I have resolved many of my gremlins. So heres my latest issue LOL

after my trans guy put another t400 in it was shifting fine but then I noticed that at a dead stop take off if gave it more than .1/2 throttle it would shutter
but if I took off in low it didnt, coincidently one day i went to put it in gear and theres was nothing. after towing to the shop and an inspection the armature that engages the manual valve rod was not in the groove and he also felt that the rod was bent slightly and was difficult the engage into the valve body itself he worked it and emry clothed it and got it moving again. he didnt have another valve body but wants to change it an feels the shuddering could be due to the manual valve body rod/shaft clearances inside the valve body. Others have said it could be the forward clutches

so again i am looking for any thoughts on this matter and as usual I am greatful for the reponses


John