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Can't find diff drain plug.

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

Discussion summary

YOUR RESEARCHCan't find diff drain plug.

Leading reported evidence

Replace engine

Performed · outcome unconfirmed

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 performed work without a confirmed outcome
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.

Performed · outcome unconfirmed · Original poster

The engine was replaced by previous owner so at this point I don't know for sure what year the engine and trans are.

Original post Read captured discussion
Can't find diff drain plug.

Performed · outcome unconfirmed · Original poster

Engine was changed by last owner--vintage unknown.

Original post Read captured discussion
Can't find diff drain plug.
Frequently discussed work

Fill hole and refilled

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

I've sucked as much fluid as possible out the fill hole and refilled.

Original post Read captured discussion
Can't find diff drain plug.
Read full discussion summary

Leading evidence: 'Replace engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill hole and refilled' (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.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 5 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Fill hole and refilled

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

I've sucked as much fluid as possible out the fill hole and refilled.

Original post Read captured discussion
Can't find diff drain plug.

Fill plug

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

I look up on the drivers side at the differential and I think I can see the 8mm fill plug, but below that I see the air cooling-like fins like on a motorcycle head where the drain plug should be poking down as per DSLamitz video, but there is no plug there.

Original post Read captured discussion
Can't find diff drain plug.

Fill plug and sometimes its own drain plug

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

I believe the differential compartment is in the transmission housing but the diff is separate and has its own fill plug and sometimes its own drain plug.

Original post Read captured discussion
Can't find diff drain plug.

Fill plug, the drain plug is at the bottom

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

You have to take off the passenger side rear wheel and then you can see the fill plug, the drain plug is at the bottom.

Original post Read captured discussion
Can't find diff drain plug.
Frequently discussed actions (7)

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

Fill hole and refilled

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

I've sucked as much fluid as possible out the fill hole and refilled.

Original post Read captured discussion
Can't find diff drain plug.

Fill plug

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

I look up on the drivers side at the differential and I think I can see the 8mm fill plug, but below that I see the air cooling-like fins like on a motorcycle head where the drain plug should be poking down as per DSLamitz video, but there is no plug there.

Original post Read captured discussion
Can't find diff drain plug.

Fill plug and sometimes its own drain plug

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

I believe the differential compartment is in the transmission housing but the diff is separate and has its own fill plug and sometimes its own drain plug.

Original post Read captured discussion
Can't find diff drain plug.

Fill plug, the drain plug is at the bottom

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

You have to take off the passenger side rear wheel and then you can see the fill plug, the drain plug is at the bottom.

Original post Read captured discussion
Can't find diff drain plug.

Replace diff oil

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

I have car up on jack stands trying to change diff oil.

Original post Read captured discussion
Can't find diff drain plug.

Replace engine

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.

Performed · outcome unconfirmed · Original poster

The engine was replaced by previous owner so at this point I don't know for sure what year the engine and trans are.

Original post Read captured discussion
Can't find diff drain plug.

Performed · outcome unconfirmed · Original poster

Engine was changed by last owner--vintage unknown.

Original post Read captured discussion
Can't find diff drain plug.

Use cable throttle i assume it has

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

To fit and use a cable throttle I assume it has to be 98 or 99.

Original post Read captured discussion
Can't find diff drain plug.
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.

5 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: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

This is weird! I have car up on jack stands trying to change diff oil. I am a 75 year old novice mechanic, but I did not know i was this bad! I cannot find 14mm drain plug for differential on my 1999 Carrera 2 with Tiptronic. The engine was replaced by previous owner so at this point I don't know for sure what year the engine and trans are. To fit and use a cable throttle I assume it has to be 98 or 99. I am following the Youtube video of DSLamitz and the ecarguides directions. I look up on the drivers side at the differential and I think I can see the 8mm fill plug, but below that I see the air cooling-like fins like on a motorcycle head where the drain plug should be poking down as per DSLamitz video, but there is no plug there. Is it possible I have a 98 engine and they did not have a drain plug? I am confused. Thanks to any one who can tell me what I am missing. (Trying to spend $40 for gear oil rather than $400 at the mechanics.)

POST 3Original post

My experience is with Audi, but I've found that some ZF transmissions do not have a drain plug for the diff, so don't be surprised if there is no drain. I've sucked as much fluid as possible out the fill hole and refilled. The diff tends to be easy on oil, and I doubt that many people both changing it.

POST 4 / ORIGINAL POSTEROriginal post

Sorry if I was not clear. The oil I want to change is the differential oil, not the transmission oil. I believe the differential compartment is in the transmission housing but the diff is separate and has its own fill plug and sometimes its own drain plug. My unknown year does not seem to have the differential drain plug. My chassis is a 99. Engine was changed by last owner--vintage unknown. The 99 in the youtube video by dslamitz has a diff drain plug. Does anyone out there know in the 996 series which years or partial years did not have a drain plug in the differential. I did suck maybe 5 oz. out with a tube from the refill hole and refill that with new, but I don't believe I really did a thorough job.

POST 5Original post

Quotes source post: 17359753

Sorry I didn't take any pics, but I recently did this on my 03 C2 w/tip. You have to take off the passenger side rear wheel and then you can see the fill plug, the drain plug is at the bottom.

This is a source reference. Confirm exact model applicability in the original material.