skipping a gear or 2 leads to grinding? - Honda Prelude Forum

Vteg · 03-11-2002, 08:55 PM

so when Im driving, I take off normally 1st and 2nd gear, and by the time Im gonna shift outta 2nd gear, Im doing like 50-60MPH, so I usually skip 3rd and 4th gear and go into 5th gear...but recently, when I do that, and go to stick it in 5th, it grinds, whats causing that? My clutch is alright, it tends to slip a bit, but nothing major, and the skipping a gear, Ive always done that with no problem, did it on my civic too, and no grinding, and my pops has been doing it all his life

EpDarks · 03-11-2002, 09:32 PM

I woudlnt reccomend it. It could potentially lead to grinding.

The least you could do is double-clutch when you do it, as with downshifting more than one gear.

Lude_conduct · 03-12-2002, 09:34 AM

I've discovered the same thing.. usually I'll skip from second to fourth.

My hypothesis on the grinding:
The input shaft is still spinning too quickly from your sprint in second gear, and the syncros need to slow down the cluster to properly mesh with 4th-gear, which will be turning at a much lower RPM. This isn't a problem when upshifting sequentially (1-2-3-4), as the input shaft varies from a max of 7400RPM at the top of the upshift, then slows to 5000~5200RPM once the upshift is engaged.

You can still skip the shift from 2nd to 4th or even 5th, but what I recommend is to wait just a second before putting it into the gate. Shift from 1st to 2nd normally, then pull the shifter out of the gate, wait for just a second while the shifter lies in "neutral," then plant it into 4th. You'll get the rhythm down quickly.

Another thing you can do:
With the clutch pedal in, pull the shifter out of second and into third, but then immediately row to 4th, then engage the clutch. This allows the thrd gear syncro to slow the input shaft a bit before the 4th-gear syncro meshes. Hope this helps.

Absolut · 03-12-2002, 10:32 AM

Quote:

Originally posted by Lude_conduct
I've discovered the same thing.. usually I'll skip from second to fourth.

My hypothesis on the grinding:
The input shaft is still spinning too quickly from your sprint in second gear, and the syncros need to slow down the cluster to properly mesh with 4th-gear, which will be turning at a much lower RPM. This isn't a problem when upshifting sequentially (1-2-3-4), as the input shaft varies from a max of 7400RPM at the top of the upshift, then slows to 5000~5200RPM once the upshift is engaged.

You can still skip the shift from 2nd to 4th or even 5th, but what I recommend is to wait just a second before putting it into the gate. Shift from 1st to 2nd normally, then pull the shifter out of the gate, wait for just a second while the shifter lies in "neutral," then plant it into 4th. You'll get the rhythm down quickly.

Another thing you can do:
With the clutch pedal in, pull the shifter out of second and into third, but then immediately row to 4th, then engage the clutch. This allows the thrd gear syncro to slow the input shaft a bit before the 4th-gear syncro meshes. Hope this helps.

You basically have to let 5th gear speed up to the speed of the input shaft. Thats where the syncros come in, jam it into gear too fast and the syncros dont have enough time to "syncronize" the shaft speeds and the gears don't mesh... Grinding.