mdmaroon
Full Access Member
2002 Liberty 4x4 3.7L with 45RFE transmission...
I've encountered a very strange problem with overdrive while climbing hills.
If I'm going about 60km/h (35mph) up a fairly steep hill, and I turn the overdrive off (so the light is on), it seems to shift UP to the highest gear, RPM drops from about 2100 down to 1500 and the engine totally bogs down.
If I leave the overdrive on, the default setting, everything is fine and the transmission seems to choose a fairly appropriate gear.
Other than going uphill at 60km/h, the overdrive works as expected. If I'm driving along at any speed that puts me in top gear, pressing the OD button makes the RPM increase as OD is disabled. Going downhill I can turn it off to get better engine braking.
If I'm going faster up a hill, it also seems to work fairly normally.
It's just that one circumstance, going uphill at 60km/h when turning OD off has the opposite effect of what's expected. Trans just goes straight to the highest possible gear and won't change down unless I floor it. Very weird. Anyone ever heard of this? I've tried lots of searching and can't really find anything.
I've encountered a very strange problem with overdrive while climbing hills.
If I'm going about 60km/h (35mph) up a fairly steep hill, and I turn the overdrive off (so the light is on), it seems to shift UP to the highest gear, RPM drops from about 2100 down to 1500 and the engine totally bogs down.
If I leave the overdrive on, the default setting, everything is fine and the transmission seems to choose a fairly appropriate gear.
Other than going uphill at 60km/h, the overdrive works as expected. If I'm driving along at any speed that puts me in top gear, pressing the OD button makes the RPM increase as OD is disabled. Going downhill I can turn it off to get better engine braking.
If I'm going faster up a hill, it also seems to work fairly normally.
It's just that one circumstance, going uphill at 60km/h when turning OD off has the opposite effect of what's expected. Trans just goes straight to the highest possible gear and won't change down unless I floor it. Very weird. Anyone ever heard of this? I've tried lots of searching and can't really find anything.
