During shakedown miles - trans wont go into r or p

I have about 200 shakedown miles on my panel truck and it was running great. Then when I got home today, I tried to put the 700r4 in Park from drive and it wouldn't go past Neutral.

I have a Lokar 32" floor shifter and today I installed a custom shift knob using their kit. It worked great all day today (about 60 miles around town). After it wouldn't go into reverse or park, I thought maybe the shift knob may be too heavy so I took it off and just pressed the set screw. I knew it worked because it locks out in Neutral and when pressed, goes back to Drive and low but nothing up at Reverse or Park.

Also, before I got these miles in, I installed a bowties TV cable and a Trango JR shift kit. Like I said, 200 great miles including DC Beltway stop and go and I-95 fast speeds.

I checked the fluid level and it's fine.

Any Suggestions? Thanks,

 

have you unhooked th e shifter linkage at the trans to see if the trans will shift to R and Park

 

No, I'll go down there and try that. thanks.

 

take the linkage off the tranny and see if it goes into R and P. if that does'nt work I'm clueless about automatics. Could it be something wrong in the valve body?

 

Well then, your ouuta luck in RACE or PUTT-PUTT

I swapped shifters in the 54 and had to cut/move some things due to the linkage which was rubbing.