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Rebuilding front differential- who has done this?

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YOUR RESEARCHRebuilding front differential- who has done this?

Leading reported evidence

Replace of the bearings in the front diff

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No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
From the information I can find, I am about 99% confident I can change all of the bearings in the front diff with the exception of the pinion shaft bearing.
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Rebuilding front differential- who has done this?

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Leading evidence: 'Replace of the bearings in the front diff' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace of the bearings in the front diff' (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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Replace pinion shaft bearing in the front diff

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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

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Suggestion · Original poster
Does anyone have any input on replacing the pinion shaft bearing in the front diff?
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Rebuilding front differential- who has done this?

Reseal job, are you sure about the gears being bad

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Discussions that contain suggestions: 1

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Suggestion
I recently pulled mine and did a reseal job, are you sure about the gears being bad?
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Rebuilding front differential- who has done this?

Frequently discussed actions (3)

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

Replace of the bearings in the front diff

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
From the information I can find, I am about 99% confident I can change all of the bearings in the front diff with the exception of the pinion shaft bearing.
Original post Read captured discussion
Rebuilding front differential- who has done this?

Replace pinion shaft bearing in the front diff

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
Does anyone have any input on replacing the pinion shaft bearing in the front diff?
Original post Read captured discussion
Rebuilding front differential- who has done this?

Reseal job, are you sure about the gears being bad

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 recently pulled mine and did a reseal job, are you sure about the gears being bad?
Original post Read captured discussion
Rebuilding front differential- who has done this?

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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.

4 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: 20261026T124918Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My 99 C4 has a bearing rumble coming from the front differential. By listening with my stethoscope, I can identify rough bearing noise from both the rear of the diff and forward near the output shafts to the axles? From the information I can find, I am about 99% confident I can change all of the bearings in the front diff with the exception of the pinion shaft bearing. It is retained by a nut that I am unsure how to remove. Does anyone know the size of the nut and what tool is used to remove it? It appears that a tie rod tool might work to reach the nut, but I don�t want to dive into a project I will be unable to complete. Does anyone have any input on replacing the pinion shaft bearing in the front diff?

POST 2Original post

I just bought a whole unit and swapped it out. Lots of guys take these out (convert to 2wd/rwd) so they can be had for reasonable $. I think I paid $275 shipped - but it was 4 or 5 years ago� everything is more expensive now

POST 3Original post

I recently pulled mine and did a reseal job, are you sure about the gears being bad? Pulling the trans can be done in less than an hour and putting nine new seals was easy. Not sure about takin the nut off and how you would get the torque correct on reinstall.

POST 4Original post

California Motorsports offers a rebuild service for these front differentials, https://californiamotorsports.net/co...t-diff-service I haven't done one yet, myself, but there is nothing particularly complicated about them.

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