just step on the gas pedal a bit more

 

same here after a cold start

 

This sounds exactly like clutch shudder. If so, giving more gas won't help at all, but may make the problem more apparent.

I have found it usually helps to slip the clutch a bit more when I first set off in the morning, and just take it easy till the car warms up a bit. Don't slip it too much with too high revs or you may burn it up! I get clutch shudder once every morning when I pull away in first from the stop sign near my house. Clutch is holding very strong though with 18K miles.

 

I think I have the same issue, if I understand you right. My problem doesn't have anything to do with the temperature though. Basically, I get a good jerking when I am in 1st gear with very low rpm, but only immediately after I give it some gas. I've learned to control it with proper gas/clutch engagement, but it's mostly to do with the gas pedal.

My problem feels like the engine starts to rev up, but then I let off the gas and it causes some sort of "reverse" torque as the car is moving but the engine tried to slow me down. The car wants to spin the wheels, but the engine is slowing me down and sends some kind of "bouncing" through the drivetrain. I don't know if that makes sense, but the point is nothing is wrong with the drivetrain and you just have to live with it. Hope that helps.

 

If it happens while you are taking your foot off the clutch, then its clutch shudder. Not much you can do about it without replacing the clutch and/or flywheel except to fan the clutch when you get moving in the morning. A stiffer front engine mount should help reduce the shudder also.

 

Sounds like I have the same situation. I was wondering if it was normal. It sounds like the drivetrain from the front of the car all the way to the back is going to break/explode (hard to describe the sounds...) You can basically feel the drivetrain "shake" almost. Not sure what its actually doing.

Its so hard to explain, but it only happens when you feather the clutch way too slowly from what I've learned. ONLY happens in first gear from a start. If you just press the clutch or let the clutch fully engage quick, it goes away...

 

The friction coefficient on two pieces of the clutch components is not uniform. During clutch engagement, the non-uniformity in the friction coefficent causes the clutch disk to grip more at certain rotational angles as the clutch disk is sliding along between the pressure plate and flywheel. Can be caused by a warped flywheel or pressure plate. Happens in many high performance clutches, esp if they have been worked hard.

 

Yeah, that sounds normal for a cold drivetrain. You just have to learn to work around it when the car is cold. Just slip the clutch a little slower and give it more gas. Just need to smooth out the working of the clutch.

 

I had that problem after i installed my twin disk with the shorter clutch engagement rod! Took the rod out and put the stock one back in and it got alot better...

 

happened to me. RRE found a missing tranny bolt was the culprit.
also only did it occasionally.

 

There is nothing wrong with the car or the clutch. I have the same problem. You just have to slip it properly. When the car jerks, your foot pressure on the gas pedal changes. Lift off the pedal or you will really jerk the car more.

 

Well its a relief to know I'm not the only one with this issue. And for the record, I don't race or abuse my evo and I've never fully launched it at WOT.

I will check for any loose/missing bolts though. I'm also planning on getting a stainless steel clutch line and stiffer motor mounts.

 

give the clutch a good slip and burn it a bit... ( don't destroy it or make it smoke or anything like that)

 

yep

 

This is normal, don't be so gentle on the accelerator. A little more on the gas will solve the issue...