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Transmission service, now P0740 CODE

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHTransmission service, now P0740 CODE

Leading reported evidence

Fill plug and add more fluid

Suggestion or failed attempt

No successful repair reported for this finding.

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Can I just add a little through that hex access plug on the transaxle or do I need to open the fill plug and add more fluid that way again?

Original post Read captured discussion
Transmission service, now P0740 CODE
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Leading evidence: 'Fill plug and add more fluid' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill plug and add more fluid' (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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1 matching discussions · 7 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Fill plug back in

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

cel, let excess drain out then put the fill plug back in.

Original post Read captured discussion
Transmission service, now P0740 CODE
Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Fill plug and add more fluid

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Can I just add a little through that hex access plug on the transaxle or do I need to open the fill plug and add more fluid that way again?

Original post Read captured discussion
Transmission service, now P0740 CODE

Fill plug back in

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

cel, let excess drain out then put the fill plug back in.

Original post Read captured discussion
Transmission service, now P0740 CODE
Coverage and how to read this overview

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.

7 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.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

So...I went ahead and drained my transmission, dropped the pan and changed out the filter. I pumped new fluid until it started dripping out, started the car a couple of times, filled, then let idle until the drain plug was at 35 deg cel, let excess drain out then put the fill plug back in. My guess is that the fluid level is low, hence the code getting thrown after 20 or so miles of driving the CEL light is on.. Can I just add a little through that hex access plug on the transaxle or do I need to open the fill plug and add more fluid that way again? Thanks in advance, still a noob with these cars.

POST 2Original post

How was it driving and shifting prior to getting the code?

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 16363047

just fine... wouldn't of thought anything about it but for the CEL

POST 4Original post

Quotes source post: 16363651

You had the CEL before touching it? You may have bigger issues For MY99 Carrera - Tip P0740 Fault, torque converter clutch - present Potential causes: ATF level not OK - ATF supply Torque converter clutch worn. - Torque converter Mechanical damage to pressure regulator 4. - Pressure regulator 4 (hydraulic) Open circuit, short circuit to ground, short circuit - Electrical triggering to pressure regulator 4 to B+. - Hydraulic control unit Sticking valves. I would definitely start with fluid level.

POST 5 / ORIGINAL POSTEROriginal post

Quotes source post: 16363663

no light before touching it

POST 6Original post

The procedure for servicing an MK-I Tiptronic is about as complicated as deactivating a nuclear reactor. Register on Renntech.org to see this DIY. https://www.renntech.org/tutorials/a.../?_fromLogin=1

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