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B18 Overdrive Clutch Slipping - Amazon 120-130 1968

Read the excellent article at http//www.buckeyetriumphs.org/technical/JOD/
It describes lots of ways to trouble shoot and check up on your overdrive. Most likely is a loss of hydraulic pressure from low oil, clogged filter(s) or worn mechanism. If the oil is OK then the most likely source of trouble is the filters (screen and fine particle filter). Also, dying solenoid can cause partial engagement of the hydraulic system leading to erratic performance. I'd start by draining the OD unit (shares oil with gearbox) and check the screen (magnet in sump) and pull the plug that allows access to the filter (consult manual). If all OK there then perhaps new oil will fix er up.

Mike!






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