My transmission problems appear to be progressively deteriorating. Planned to change gear oil to see if my transmissions occasional reluctance to go into 1st would decrease. Removed the transmission drain plug and found it covered with metallic debris. Cleaned the plug and debris and found my gearbox ate a roller bearing. Discovered 7 cylinders 0.157 diameter x 0.291 long. The only section of the cage I could find intact enough to estimate diameter is small. Estimate cage to be approximately 1.25~1.5diameter, estimate suspect at best. Reviewing the parts manual, the only Roller Cage bearings I could find that appear to be this small are the Reverse Idler Gear Roller Cage #104734 (2 required) and the 4 Rocker Arm Fork Roller Cage #131895 (1 per Fork/ 4 Forks). The remaining Roller Cage Bearings are related to the various transmission idler gears and appear too large. Welcome opinions as to which roller bearing failed. The transmission shifts fine, other than the occasional reluctance to go into 1st, makes no unusual noise, grinding, etc. Drove the car prior to the transmission change to warm the fluid. Transmission performed flawlessly. I suspect the Reverse idle gear roller cage because there are 2 bearings. If the roller cage for the Rocker Arm Fork failed, I suspect I would not be able to shift the gears controlled by that arm. Can I access the suspect bearings with the transmission in the car? Opinions welcome. Thank you.