Planet-9

2nd Gear Synchro

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Original source

5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2nd Gear Synchro

Reported or suspected cause

3-2 downshift

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

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 report identifying a cause: 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.

Reported cause
Problem is the 3-2 downshift when the weather is warm.
Original post Read captured discussion
2nd Gear Synchro

Frequently discussed work

Check trans fluid level

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'm planning to check the trans fluid level to be sure I got enough in when I changed it.
Original post Read captured discussion
2nd Gear Synchro

Read full discussion summary

Leading evidence: '3-2 downshift' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is '3-2 downshift' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check trans fluid level' (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 · 1 partial discussions

Compare 4 other evidence results

Replace trans fluid (approx 53k mi

Performed · outcome unconfirmed

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
When I got home, I changed the trans fluid (approx 53K mi on it with lots of track days).
Original post Read captured discussion
2nd Gear Synchro

Run last two sessions by leaving it in 3rd

Performed · outcome unconfirmed

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
I ran the last two sessions by leaving it in 3rd.
Original post Read captured discussion
2nd Gear Synchro

Check trans fluid level

Suggestion or failed attempt

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'm planning to check the trans fluid level to be sure I got enough in when I changed it.
Original post Read captured discussion
2nd Gear Synchro

Run on the street

Suggestion or failed attempt

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
When I'd run on the street, it would crunch about every 4th or 5th time.
Original post Read captured discussion
2nd Gear Synchro

Frequently discussed actions (4)

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

Check trans fluid level

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'm planning to check the trans fluid level to be sure I got enough in when I changed it.
Original post Read captured discussion
2nd Gear Synchro

Replace trans fluid (approx 53k mi

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
When I got home, I changed the trans fluid (approx 53K mi on it with lots of track days).
Original post Read captured discussion
2nd Gear Synchro

Run last two sessions by leaving it in 3rd

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
I ran the last two sessions by leaving it in 3rd.
Original post Read captured discussion
2nd Gear Synchro

Run on the street

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
When I'd run on the street, it would crunch about every 4th or 5th time.
Original post Read captured discussion
2nd Gear Synchro

Reported and suspected causes (1)

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

3-2 downshift

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that report identifying a cause: 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.

Reported cause
Problem is the 3-2 downshift when the weather is warm.
Original post Read captured discussion
2nd Gear Synchro

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.

Planet-9: 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: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

2nd Gear Synchro? Not sure if I have a 2nd gear synchro issue or something else. In the searches I've found, my symptoms seem to be opposite of everyone else's. Background... Last Aug after 2.5 glorious days at Indy, my 3-2 downshift got crunchy. Came on suddenly. There are three corners that required this shift. I ran the last two sessions by leaving it in 3rd. When I'd run on the street, it would crunch about every 4th or 5th time. When I got home, I changed the trans fluid (approx 53K mi on it with lots of track days). It seemed to be fixed, but I didn't do anymore DEs so I didn't have an earnest 3-2 shift to really try it out. Drove thru the winter with no issues. Now that the weather has warmed up, the crunch is back when I do a fast 3-2 downshift. Most of the searches I've found talk about the 1-2 shift being crunchy, it pops out of 2nd gear, and it's worse when the weather or trans is cold. Mine doesn't have any of those issues. Problem is the 3-2 downshift when the weather is warm. So, is it a 2nd gear synchro or something else? I'm planning to check the trans fluid level to be sure I got enough in when I changed it. If it is a synchro, how tough of a job is it to change? Are there kits available? Thanks for your thoughts. Indy 2018 is in Aug.

POST 2Original post

My thought, guess, is that your 2nd gear synchro is getting weak, that may be obvious. So I was wondering if there is a higher viscosity oil you could use. Yes it would make your transmission crunchy when cold but once warmed up it may solve your synchro problem. As I said my thoughts. Good luck!

POST 3Original post

Re: 2nd Gear Synchro? If I was having this issue I'd check/ bleed the clutch and add some Lubro Moly MoS2 to the gearbox.

POST 4Original post

Re: 2nd Gear Synchro? I would also check that your clutch is disengaging fully...but it's likely that your 2nd gear synchro is worn. Also, are you giving it a good heel-toe blip on the downshift? I have not heard of anyone rebuilding these transmissions. I've done old 901s and it was not difficult; a manual transmission is not that complicated. It might make more sense to swap in a rebuilt unit or low-mileage salvage.

POST 5Original post

Re: 2nd Gear Synchro? Yes, I am doing a heel-toe blip.

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