I would like to apologise for the oversight on my part regarding the manual test done.
The manual test confirms that it is a mechanical fault and possible causes are :
Reverse gear slipping.
Faulty 2nd coast brake, front and rear planetary gear unit or direct clutch.
Faulty 1st and reverse brake.
Faulty OD direct clutch.
Faulty 2nd brake or No. 1 one-way clutch.
Faulty direct clutch.
Faulty OD brake.
Since problem arises only at operating temperature, it could be caused by one or more seals that loses their sealing properties and resuting in loss of line pressure.
Valvebody problems should be more consistent and not only when at operating temperature.
Thursday, February 26th, 2009 AT 7:43 AM