Hi all.
I am having some lockup torque converter issues and I was hoping there may be some Auto trans gurus out there with some suggestions or anyone that has experienced a similar issue.
I have an auto 1997 HDJ80 . The auto trans operates really well and shifts really nicely, except for the one issue im having is that my lockup torque converter won't release under certain conditions.
It locks up at the correct speeds etc, (around 60-65km/h under light acceleration) and if I then accelerate it will unlock correctly, but if It locks in and then i coast or brake to a stop, it stays locked until I almost come to a stop (about 600rpm) and then finally lets go . It actually starts to make the engine labour/chugg almost like when you forget to put your foot on the clutch in a manual when coming to a stop.
If I accelerate at any point during the deceleration it will unlock fine.
I have checked the electronic control system and it all seems to be getting all the correct voltages, resistances and signals, and I have driven it with a volt meter in the lockup solenoid circuit and it is getting 12 volts to lock the t/c, and the whenever i take my foot off the accelerator or touch the brake it looses the 12 volts (as it should) but even though the solenoid is not receiving 12 volts it still remains locked until almost a stop.
I thought it may have been a sticky solenoid but it unlocks correctly every time when I accelerate just not when I am decelerating.
Its serviced regularly, clean unburnt oil, kick down cable adjusted as per workshop manual and throttle position sensor has been replaced and adjusted to specs.
Any thought would be greatly appreciated.
Cheers.
I am having some lockup torque converter issues and I was hoping there may be some Auto trans gurus out there with some suggestions or anyone that has experienced a similar issue.
I have an auto 1997 HDJ80 . The auto trans operates really well and shifts really nicely, except for the one issue im having is that my lockup torque converter won't release under certain conditions.
It locks up at the correct speeds etc, (around 60-65km/h under light acceleration) and if I then accelerate it will unlock correctly, but if It locks in and then i coast or brake to a stop, it stays locked until I almost come to a stop (about 600rpm) and then finally lets go . It actually starts to make the engine labour/chugg almost like when you forget to put your foot on the clutch in a manual when coming to a stop.
If I accelerate at any point during the deceleration it will unlock fine.
I have checked the electronic control system and it all seems to be getting all the correct voltages, resistances and signals, and I have driven it with a volt meter in the lockup solenoid circuit and it is getting 12 volts to lock the t/c, and the whenever i take my foot off the accelerator or touch the brake it looses the 12 volts (as it should) but even though the solenoid is not receiving 12 volts it still remains locked until almost a stop.
I thought it may have been a sticky solenoid but it unlocks correctly every time when I accelerate just not when I am decelerating.
Its serviced regularly, clean unburnt oil, kick down cable adjusted as per workshop manual and throttle position sensor has been replaced and adjusted to specs.
Any thought would be greatly appreciated.
Cheers.
