The most accurate list I have compiled on the manual trannies in the J-body.
3.1L Engine
92-94 - NVG T550 5 speed
90-91 - HM-282 (Getrag/Muncie) 5 speed
2.8L Engine
87-89 - Getrag/Muncie OR Isuzu 5 speed
85-86 - Muncie 4 speed
2.2L Engine
90-95 - Isuzu 5 speed
2.0L Engine
82-89 - Isuzu 5 speed, or Muncie 4 speed
2.4L Engine
96-99 - Isuzu 5 speed
00+ - Getrag/Muncie 5 speed
92-94 - NVG T550 5 speed
90-91 - HM-282 (Getrag/Muncie) 5 speed
2.8L Engine
87-89 - Getrag/Muncie OR Isuzu 5 speed
85-86 - Muncie 4 speed
2.2L Engine
90-95 - Isuzu 5 speed
2.0L Engine
82-89 - Isuzu 5 speed, or Muncie 4 speed
2.4L Engine
96-99 - Isuzu 5 speed
00+ - Getrag/Muncie 5 speed
