YOUR RESEARCHTiptronic Issues
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 3 captured posts examined · 0 partial discussions
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have a 1998 996 C2 Tiptronic, which at some time in the past has had a Mercedes box fitted. I'm finding that, after about 60 miles on track days, the downshift becomes reluctant or sluggish. Sometimes, when accelerating hard in 2nd, it locks in gear - sometimes 2nd, sometimes 4th with M and 4 flickering on the dashboard display. Anyone else had this experience? Is it likely to be the box or the controller? Alan T
Are you sure it is a Mercedes box? 1998 cars were fitted with a ZF box - the MB box was introduced for the MY2002 facelift. There are so many different parts used, that I would be surprised if someone had retrofitted one. Apart from the gearbox, there is the linkage, lever, controller, and quite a bit of re-wiring. Also, the DME (engine ECU) would probably struggle to communicate with the Tiptronic controller. Not saying it is impossible, but it would be a nightmare for anyone to troubleshoot. Best bet is to get it plugged in to a Porsche tester, and see what it shows up.
I know nothing about the Tip box. But Oil change?? That would be my 1st plan.
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