Thanks crenwelge,
The tranny is original to the truck. It was working well when I took my truck down to the frame and over an 8 year period put it back together. At that time, I did not open the transmission, but replenished the lube (90 W) and scrubbed the exterior prior to installing it in my then open frame. The pilot bushing was brand new 5K miles ago. Other than jumping out of 3rd under load, It shifts very well and is quiet. The shift forks condition are unknown. While under there yesterday It does seem to now have a leak. I am wondering if installing a "kit" would help and may be the next option to approach. I may need to make some pins (upper bolt locations) to aid in the removal where they slide back away from the bell housing. BTW Is there a recommended kit I should look for?