rustywave Posted on Oct 18 2006, 09:43 PM
It is not that I thought of this... I've been reading this from xv and many others.
When I first got the S2000 I thought it was cool (still do ) because it gives the S2000 a "race car" feeling: from what I'v seen on TV those cars also "jump" forward a bit when they select first gear, as if the whole drive line is "activated" and ready to GO

RED MX5 Posted on Oct 18 2006, 09:50 PM
When the clutch doens't fully disengage, shifting into 2nd would also create this lunge (a little less I guess, but still)... would't it?

I was assuming the clutch was working properly... until...
pepperoni Posted on Oct 18 2006, 06:27 PM

What have you been doing?.. if I may ask

 

LOL!
By futzing, I mean making sure I have the pedal all the way in and not doing anything wierd. Just regular Joe stuff, ya know?

Now that you mention it, the shift into 2nd is a little clunky too. Feels like the linkage runs into something. You can feel it through the shifter handle as you go from 1st to 2nd..

Does yours go straight into 2nd like butter, or can you feel something through the handle? Again.. regular Joe type driving.

Don't get me wrong though, I'm not nit-picking. I'm just comparing the shift feeling to my old Miata and my race car. The race car shifter works like butter and it's pretty well thrashed on. I had higher expectations with the s2k trans.

 

pepperoni Posted on Oct 18 2006, 10:51 PM


Remember you are sitting next to the gearbox (when you sit in your car ) and the shifter is linked almost directly into the gearbox with steel shafts, not sloppy cables or anything.
You actually feel what you are doing inside the gearbox, moving shiftforks, engaging gears by working the synchro's ect....

See above

 

If you put the car in second first , then the transmission is slowed before first is engaged, and the driveline shouldn't see much of a load.

All you should feel is the resistance from the lockout ring, and the car should not normally move forward. The reason some race cars do that is because hot clutches sometimes fail to disengage fully, and that *might* be what's going on here. OR, it could just be that the OP is feeling something perfectly normal and describing it in way that makes it sould like a problem.

When you release the clutch, does it fully engage in the middle of the stroke, or is it engaging before the pedal gets to the middle of the stroke?

If this is just something you're feeling through the "handle" , and not the car itself lunging forward, then you're probably just feeling the transmission doing it's job. Pull the shifter into second, then first, and (when the transmission is warm) there will be a little resistance from the lockout ring as the synchro matches shaft speeds, then the shifter should slide into first without making any "clunk." If it clunks the shaft speeds weren't quite matched, so maybe a little less force on the shifter. ???

I don't know if this will help or not, but here's a link to a short video where I put the car into first at a red light. The pull against the second gear synchro happens pretty quickly, so I edited the video to slow it down. After the slow motion shift there is a repeat of the video in real time. During the real time portion of the video there is sound, so you can turn up the volume and listen for "clunks." If anyone hears a clunk, let me know.

Please right-click and save as.

 

A clunk is one thing. Moving the car forward is another. I doubt the inertial mass of the clutch disk and the tranny turning over at 900 RPM's is enough to move a car forward. I'd be more inclined to think the clutch isn't fully disengaging.

Try this, sit there, put the clutch in, then wait 10 seconds before shifting into first. If it still clunks, then I'd probably start by bleeding the clutch because something's still driving the clutch disk. If it doesn't then, maybe it is simply inertial mass at 900 RPM's.