I replaced the new flywheel and new clutch kits. It doesn't work. Why? If car is off I can shift in to a gear but it starts I cannot engage into gear. What is wrong?

Try starting it in gear than shift with rpm dwn shift Rev rpm up by 1500 to up shif let rpm go down by 1500

I suspect your clutch and pressure plate needs to be replaced,when you depress your pedal to disengage your transmission from your flywheel the pressure plate is not engaging enough to seperate the two it still has a little contact on your flywheel so it is going to be difficult to change gears and your relief is going to be shorter.If you change it out always remember buy a clutch kit with a clutch plate and pressure plate and pilot bushing and slave cylinder all in one kit.Always remove your flywheel and get it resurfaced that is a must ,the flywheels surface will become uneven over time and minimize your surface area on your disc,by getting it resurfaced it will assure your disc has 100% of the flywheel surface for hook up and when you depress your clutch it will clear your flywheel good luck

It jump because the clutch disc itself is good, but the clutch is not engaging-the pedal is not making the clutch engage. When it does, then you can shift without grinding, then you can shift period. Clutch pedal operates a cable or it operates a hydraulic system-they both, which ever one you have, move the clutch fork on the transmission bell housing just a bit to cause the clutch to disengage the transmission from the engine's flywheel...so you can shift, see, easy, smooth shifts, no problem, no grinding. Your clutch itself is okay, the pedal is just not operating it.

are you sure the driven plate is on the correct side? The clutch bearing is correct on high? Does the slave or master cylinder works ok? do they keep steady pressure when needed? Is the clutch kit the correct part according to engine type?

bad pressure plate or stuck throw out bearing.

Check your clutch fluid,if empty,then your slave cylinder is bad.

the transmission is cr#$

If you can see the slave cylinder actuate, then have someone push the clutch down and watch for movement. You should see the release lever move at least a half inch. Let me know if you get movement. I also would like to know if you had the flywheel machined and if you removed, replaced, or added any shims between the ****** and engine block.

Pressure plate is bad need new fork bearing and pressure plate... be sure to have the flywheel resurfaced for best results

hi it sounds like your clutch is on its way out thats why when the engine switch off its easy for the gear to go in but when the engine is running the flywheel is turning and makes if very difficult or sometimes impossible to engage the gear as the clutch is worn and wont disengage .