15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTiptronic will not go into drive !
Reported or suspected cause
brake/shifter interlock switch
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that report identifying a cause
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Reported cause
The last time this happened to me on a vehicle, it was the brake/shifter interlock switch that failed.
Leading evidence: 'brake/shifter interlock switch' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'brake/shifter interlock switch' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check fluid level though' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Yes, the torque converter uses the transmission fluid to transfer the engine energy to the gears.
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15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
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Generation: 20261027T165639Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My 99 C2 coupe Tiptronic. Will not go into drive.
No CEl or flashing drive letters. no codes when I used my ODB II reader
I am able to put it in reverse and she moves normally.
No symptoms before. no slipping or leaks or anything strange.
Drove home Friday, parked normally, not driven on Sunday. now not going into drive.
Some questions:
What causes the lock out of drive ?
Is this a mechanical problem ?
a fluid level problem ?
Pure speculation, just so your post gets bumped and someone smart can read it...
The last time this happened to me on a vehicle, it was the brake/shifter interlock switch that failed.
Good luck!
It will not physically go into D. Acts like there is physical blockage or linkage problem ?
It seems that if the bands are bad or something like that it should at least get the lever into the D position.
I tried to copy the manual for it but it is encrypted, sorry. Although I never replaced mine, it looks very simple to get to and replace.
You may want to for the time being, is to just remove it so you can drive your car until you replace it.
Right on the money gentlemen. Most Excellnt calls ! The switch is ok, but some thing had dislodged and was blocking the detent.
I am taking this as a sign from the Porsche Gods to go get the fluid changed and a couple other minor things fixed at my favorite Indy. Since I am off work the car is now at the shop ...
Whew.. At least I dont have to get a new transmission!
Hi guys (and girls!)
I have a 964 C2 Tip that went funny last week when she hopped out of drive and revved like the clutch was slipping...
but as there's a tip gearbox no clutch (as we know it )involved...Car goes into reverse ok, so I presume this means gearbox not SNAFU...but won't engage drive. Any ideas?
HELP!!!
Colm Galway,Ireland
Hi there!
Right Chris,but you see in Ireland Auto gearboxes are a novelty...not a lot of 'em about. So does the torque converter need fluid to function? I have to plead ignorance here...and what was the detent referred to in one of the previous posts?
Cheers,
Colm
Yes, the torque converter uses the transmission fluid to transfer the engine energy to the gears. If you fill a bathtub and move your hand slowly through the water there's not much resistance, move your hand quickly (rev the engine) and there is a lot of resistance. The torque converter is a fluid coupling that transfers the energy and also allows the car to come to a stop without stalling like a clutch. Simple and ingenious.
Just because you have one doesn't necessarily explain why you would be jumping out of first though. It's not a user serviceable part and not the greatest idea to try and diagnose or DIY and auto transmission. You could check the fluid level though. Low fluid will result in no transfer from engine to gears.
This is a source reference. Confirm exact model applicability in the original material.
