AlB

I had a chance to wring it out this morning and thought I would share my take on the mods.

SSK Before:
shifting had longer throws
it was buttery smooth and effortless
non-feeling shift
Quiet

SSk After:
shorter throws
Nice mechanical feel with a bit more effort required
snik snik says it all
Under hard acceleration a bit of vibration, quiet under normal conditions

CDV Before:
Slight catch on first gear launch
Jerking on first to second shifts
Hill assist engaged

CDV After:
Easy first gear launch
first to second shift grabs and pulls immediately
Hill assist is gone (Anyone else who has done the CDV replacement, did you lose your hill assist as well?)

al

6spd

what is hill assist?

AlB

When the car was on an uphill grade (as sensed by computer I suppose), you could release your foot from the brake and it would hold for about 2 seconds. This would give time to work clutch/go pedal before rolling backward.

I will not notice the change as much as my wife will

AlexFW

What are SSK and CDV ?

6spd

short shift kit - shortens the throw of the manual transmission shifter
clutch delay valve - once removed, or installed with a modified cdv, clutch modulation(for lack of better words) is more prominent/prevalent(?). the clutch delay valve has a smaller orifice than the actual hydraulic line, so less fluid is flowing when the clutch is activated. I guess this results in a numb clutch.

correct me if I am wrong.

AlB

I will let Dave Zeckhausen explain it:

The Clutch Delay Valve (CDV) is a one-way restrictor installed by the factory between the clutch slave cylinder and clutch master cylinder. It "delays" the engagement of the clutch, much like old record players used a damped tone-arm to gently lower the needle onto the surface of a record.

Because of this valve, no matter how quickly you lift your foot off the clutch pedal, the clutch engages the flywheel at a constant (slow) rate. In theory, it can save the driveline from shock, were an inexperienced (or immature) driver to dump the clutch at high RPM. But in practice, all it does is prematurely wear out the clutch and turn experienced drivers into people who, despite 20 years of practice, cannot shift gears smoothly. During parallel parking maneuvers, the delay can be infuriating, causing constant clutch slippage. And during hard acceleration, the large amount of clutch slippage can greatly shorten the life of your clutch. During normal, sedate driving, the shift from first into second gear is often jerky, leading passengers to question your skill. As the driver, you can see your passengers' heads bobbing back and forth during every shift! Yes, in their minds, they are laughing at you.

al

pa550

Al -

I tested my car this morning and the hill assist is indeed still working. Did you bleed the clutch after replacing the CDV? I'm thinking there is something wrong with your brakes or the sensor/computer that modulates hill assist.

6spd

what is this hill assist?

kchan

Same here, hill assist still works after replacing my CDV...