:: Gear slip

[Qube]

For the scant 10 years I've been driving manual, I've never had a gear slip on me. Yesterday I was driving, pushed her into first as normal... and took of gently. Yes. GENTLY. She slipped out of first into neutral violently. I could have sworn I got rear ended and she slipped out of gear. Stopped at the side and absolutely no hint of damage on the rear so verdict is it slipped.

Now, OTHER than user error, are there any precursors to this? Low fluid? Anything? I tell ya, that was a nasty experience.

[Ferret]

For the scant 10 years I've been driving manual, I've never had a gear slip on me. Yesterday I was driving, pushed her into first as normal... and took of gently. Yes. GENTLY. She slipped out of first into neutral violently. I could have sworn I got rear ended and she slipped out of gear. Stopped at the side and absolutely no hint of damage on the rear so verdict is it slipped.

Now, OTHER than user error, are there any precursors to this? Low fluid? Anything? I tell ya, that was a nasty experience.

It /is/ possible by a longshot that your gearbox is low on oil, but it would have already done damage by this point if that's the cause.

I dont mean to scare, but this is usually the first sign that your synchromeshes are on their way out... the only way to fix that is to have the gearbox rebuilt.



While I'm thinking about it, how's your clutch, is there any chance it could have bitten? That's usually caused by a crank oil leak, which causes the clutch to snatch and judder.

[filip00]

our cars are old, mine has 155k miles, and no gear slip ever, but if one happens, i won't be shocked or surprised, the cars are old, driven everyday, with a lot of hp going thru the gearbox.

i think you should be fine if it doesn't happen again

[Qube]

Synchros seem fine in rev shift tests. HOWEVER, it has refused second before in higher rev downshifts unmatched. I'll chalk this up to a fluke unless it happens again.

Clutch is good with mid pedal engagement. That's easy as I have a full Sachs kit on standby for replacement. Now what do you mean that the clutch could have bitten?

...synchromeshes are on their way out... the only way to fix that is to have the gearbox rebuilt.

...how's your clutch, is there any chance it could have bitten? That's usually caused by a crank oil leak, which causes the clutch to snatch and judder.

[Barney Paull-Edwards]

sounds like that bloody valve in the clutch line to cushion drive line from dumped clutch starts, DELETE and drive sensibly, or not!

[Dave M]

our cars are old, mine has 155k miles, and no gear slip ever, but if one happens, i won't be shocked or surprised, the cars are old, driven everyday, with a lot of hp going thru the gearbox.

i think you should be fine if it doesn't happen again

Yep. Every day mine shifts flawlessly is money in the bank. 525,000 km on original ZF 5-speed. Crosses fingers and knocks on wood .

Dave

[632 Regal]

I'll hopefully guess that you didnt push into 1st quite enough and it wont happen again. I vote fluke.

[Qube]

Oh goodie. Happened again. I wonder how slow I'm doing to need to start to avoid this now... or maybe start in second :| Once more and I'll start getting worried.

[632 Regal]

start looking into used boxes to get an idea.

Oh goodie. Happened again. I wonder how slow I'm doing to need to start to avoid this now... or maybe start in second :| Once more and I'll start getting worried.

[whiskychaser]

Oh goodie. Happened again. I wonder how slow I'm doing to need to start to avoid this now... or maybe start in second :| Once more and I'll start getting worried.

If you are tired and didnt press the clutch home fully, or there is some play in the mechanism, the gear doesnt go fully home. Result-a big thump, loads of revs and you are going nowhere. Starting in 2nd is just avoiding the issue and will damage your clutch. If your gut feeling tells you it shouldnt be jumping out of first, it probably shoudnt.