Torque converter going South

[help 6]

Hey, guys first post and new to the board hope you can help. I have an 87 GN that is slow to spool no exhaust leaks and it feels like it is slipping at the shifts. The person I bought the car from said the Tranny was rebuilt 3 years ago by Phoenix transmission in weatherford with performance parts. I guess my question is does it sound like the tranny or the converter which is a stock d5 I was told. I tried adjusting the TV cable but still not right. Sorry this is so long just trying to figure this out. Thanks in advance

 

[buickboy]

First problem is that Phoenix did the work. Heard lots of horor stories about them and 200's. Second, if its slipping with a D5 convertor its probably the trans not the convertor. D5's are very reliable and tough. I had a local (Arlington) guy do mine with lots of 200 experience. Mine lives behind a 600 hp
V-6 Call me at 972 603-1389 m-f for his number
Mitch