After 235K km, 3 oil and filter changes, careful handling of the bowl (always "memorial customer" during PRND-running) came the D2/E38 classic - the reverse movement was in the ass.Sure,you expect it to happen sometime,because it is inevitable - the piston of the clutch F is now a cover part - nevertheless, you are only at the cursing, if you keep in mind the associated repair.The gearbox must be removed and completely disassembled because the piston is sitting gaaaaanz at the back.
So far, the bowl has switched absolutely free of jerks, no faults in every driving stage and under all driving conditions.Yes, until I wanted to drive into my garage a few weeks ago. The huge threshold of 3 (three) centimeters represented an insurmountable obstacle for the thickness.The engine roared but the thickness did not move a millimeter. Thank God the forward gears work when the F coupling is defective, so I could drive on for the time being.The reverse gear was fortunately not yet completely dead.On a flat ground the cart only crept, but at least it crept.At the smallest climb, on the kerb, etc. However, it was a bit stupid, but until the repair was done, I always parked in the "fluid direction" and avoided driving backwards to avoid unnecessary burdening of the clutch lamellas.
Well, Peter, my Silesian Audi guru (merci that you exist, old age) had a free Saturday and we were able to get on it the day before yesterday.In the meantime, I got parts directly from ZF - at Audi for three times the price and some EOE.I have renewed the said piston, all Simmer,O-rings and seals. Two new roller sleeves, 12l gear and 2l differential oil. Otherwise, no parts have been provided, although the clutches A and D of the 5HPxx also often raise their ass.But since the failure of the R-speed I drove almost 3K km and the Tiptronic still switched butter-soft, no error in the FS or other negative abnormalities. If other parts were necessary after the disassembly, it would have been necessary to change them, then the thickness would have remained on stage for a few days. Luckily, that was not the case.The gearbox looked inside like new.No smell of the burnt oil,no mud,no fractures and cracks on the waves and baskets,no visible wear on the lamellas,on the contrary, there were even part numbers to be seen.The old oil was still to be seen as red and by the magnets there were no chips- since the last oil change at least 56K km.The culprit - the piston of the clutch F -can be recognized immediately as worn.The inner rubber torn in and the outer brittle and crumbled.Everything reassembled,new oil pure(10,8l)
The whole party took about 12 hours (three each for installation and three for dismantling and assembly), but we also renewed the left flex tube and the brake fluid on occasion. Of course, there were a lot of laughter and curses
It cost me 250 eggs of parts (in particular 26 pieces) and almost 100 for oil. The biggest cost factor, of course, is the Maloche, which - as I know Peter and I know him for more than 20 years - is more symbolic given the workload.In the appendix the photo of the defective piston.
I can pass on the ZF part numbers on request.
