Originally Posted by AndyCT9W

IMPORTANT: Note that the How to clutch adjust that you posted doesn't mention to check the clutch slave cylinder as you adjust. If you over adjust, the slave cylinder won't be able to adjust for the wear and tear of the clutch. Your clutch will wear down but won't adjust and will start slipping. Same instructions with slave cylinder check http://www.google.co.nz/url?sa=t&rct...r2_sCSAdHS4l4A.

Double clutching = good! I double clutch quite often when everything is cold. It does make everything a lot smoother, I don't do it if everything is warm and smooth. I like to blip the throttle when the car is in neutral during a double clutch to help rev matching.

Double clutching was originally used (and still is in a lot of big trucks etc) in vehicles that didn't have synchronizers (synchros) in their transmissions. Without a synchronizer to assist in the change of speed of the gears in the transmission, the gears would have to accelerate/decelerate too fast too quick and will grind and cause damage. Double clutching is used to help with reducing the amount of acceleration/deceleration of the gears. Synchronizers assist in the acceleration/deceleration of gears in the transmission, so to double clutch in a car that has synchros really just reduces the amount of stress/work put on the synchro. A lot of people will say it's pointless in a synchronized transmission but if your synchros are worn/damaged it it hugely beneficial to smoothness and the remaining life of the synchro.

Why do you think your clutch is due?

My advice:

Check clutch adjust and check if clutch is dragging
Replace transmission fluid (maybe add synchro mesh)
Replace shifter bushings

There are more steps you can go through if this doesn't help.

Good link: http://auto.howstuffworks.com/transmission.htm

(If I've stated anything blatantly wrong, anyone can feel free to correct me).

Originally Posted by matlark

I just bought a used 08 gsr and suffer the same 1-2 grind only. It only happens when it is cold, I did the amsoil trans fluid change and I think it helped a little, but it doesn't work miracles. From what I have read this is a common issue.

Originally Posted by matlark

I just bought a used 08 gsr and suffer the same 1-2 grind only. It only happens when it is cold, I did the amsoil trans fluid change and I think it helped a little, but it doesn't work miracles. From what I have read this is a common issue.