KiwiTDI
Active Member
- Posts
- 198
Some advice please. 1996 300tdi auto with mechanical injector pump. 360,000 km. No record of previous auto box work in service history.
After a trouble free 4 week 4000 km trip around nz, during the last 200km I noticed that after reaching 76kmph (the usual lock up speed) the lock up clutch was “slipping” and the lock up engagement not as “definite” as usual. The lock up was happening but if I applied a bit of throttle to go uphill, or get to 100kmph the revs would rise too quickly indicating the lock up clutch was slipping. I obviously avoided allowing the clutch to slip and drove home as slowly as possible.
Since I have owned the car (12 years and 60,000 km) the lock up has been a slight issue, when cold the first lock up would occasionally not happen if 76kmph was passed too gradually, eg slowly accelerated through, and after that lock up would continue to not happen until the car was accelerated quickly past 76kmph with right foot planted. After that no problems for rest of the day.
The fluid in the dip stick does not look burnt or brown etc. I changed/flushed it some 60,000 km ago at the same time as replacing auto box oil cooler hoses, but I did not remove the gearbox sump and do a full filter and oil change.
I have ordered an auto box filter kit from paddocks which will arrive in a week or so, in the hope a fluid change will fix the issue, my question is whether there is anything else I should check whilst the sump is off eg solenoid or valve, to increase my chances of fixing the issue. I am pretty sure the zf4hp22 box fitted, is the 100% mechanical not electrical type.
After a trouble free 4 week 4000 km trip around nz, during the last 200km I noticed that after reaching 76kmph (the usual lock up speed) the lock up clutch was “slipping” and the lock up engagement not as “definite” as usual. The lock up was happening but if I applied a bit of throttle to go uphill, or get to 100kmph the revs would rise too quickly indicating the lock up clutch was slipping. I obviously avoided allowing the clutch to slip and drove home as slowly as possible.
Since I have owned the car (12 years and 60,000 km) the lock up has been a slight issue, when cold the first lock up would occasionally not happen if 76kmph was passed too gradually, eg slowly accelerated through, and after that lock up would continue to not happen until the car was accelerated quickly past 76kmph with right foot planted. After that no problems for rest of the day.
The fluid in the dip stick does not look burnt or brown etc. I changed/flushed it some 60,000 km ago at the same time as replacing auto box oil cooler hoses, but I did not remove the gearbox sump and do a full filter and oil change.
I have ordered an auto box filter kit from paddocks which will arrive in a week or so, in the hope a fluid change will fix the issue, my question is whether there is anything else I should check whilst the sump is off eg solenoid or valve, to increase my chances of fixing the issue. I am pretty sure the zf4hp22 box fitted, is the 100% mechanical not electrical type.
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