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Jeep Winches: Transmission PTO Adapter

by Terry L. Howe

Most heavy duty transmissions have PTO ports onto which a PTO adpater can be bolted. Some examples of transmissions with PTO ports include the T-18, T-19, NP435, NV4500, SM465, and SM420. The PTO adapters I've seen all have a front and rear output.

Since these transmission PTO adapters are driven off of the countershaft, their speed and direction is not effected by the gear that the transmission is in. Only engine RPM can be used to change the speed. Normally, the PTO is only used with the transmission in neutral.

Transmission PTO adapter Plate removed from PTO port on T-18.
Transmission PTO adapter Top view of transmission PTO adapter on CJ T-18. It can be torn apart and rebuilt for rear or front output. The unit can also be mounted so the shaft is high or low and the shift lever can be mounted on either side.
Transmission PTO adapter Back view of transmission PTO adapter on CJ T-18. This PTO adapter has been set up for rear output.
Transmission PTO adapter Transmission PTO adapter on 3 ton GMC tow truck from the early 60s. This particular PTO adapter is attached to a SM420 transmission. The adapter itself is red, the PTO shaft runs parallel with the drive shaft.

Contributors

Thanks to Jeepin Joe Heinrich for the T-18 transmission PTO adapter pictures and information.

Last modified Wednesday, 01-Dec-2010 09:10:10 MST


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Comments:

Frank Martin (6/25/2013)
I currently have a SM420 with PTO 22NC7 LS3 and wish to use it on my NV4500 to run my dumper. Is this possible? What changes would I have to make. Please email me your answer to martin@xmission.com. If it will not work what are my options for the NV4500? Thank you.

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