Combines 1660 slips out of second gear

[Redhat]

Your thinking the right way. Check the detents_cables first but if those don't fix problem then the transmission will have to come out and second gear set replaced. Have seen a bungee cord on the shifter in the cab work in an emergency to finish a day or two but it will wear the shift fork in the transmission.

 

[larryNCKS]

Check to make sure you don't have chaff and dbris piled up in your shift linkage at the transmission. This can act as a counter spring and pop the rascal out of gear without there being problems in your transmission.

 

[Gurch]

Sorry to tell you but you will have to have 2nd gear replaced. The gear gets worn and it won't stay in. We had the same thing in a 2166. labour wasn't bad but the parts were a killer for price.