NSG370 6 Speed hard 1st to 2nd Shifts

[Labour]

When I shift from 1st gear to second gear it often grinds, unless I am especially careful with the shift.  Has anyone else had trouble?  Or is the synchro gear not working properly?

The Jeep is a 2005 Rubicon, and I went to the dealership and they said things were fine, but I doubt they drove it very much.   

Any thoughts?

[hps4evr]

when does this happen? ive see nthis to be rather common when the ax-15 is cold. the 1-2 shift is kinda slow and can grind a little. once its warm its much better. ive seen it on the ax-5 too. if its all the time then there may be a problem. any other gears seem odd? be very sure that the clutch is all the way in as well.

[Labour]

It happens only when shifting from 1st to 2nd.   I have not had the Jeep long enough to notice a difference between when it is cold and after 30 minutes of driving.  So far it appear to be mostly related to how high fast I shift and how fast I am going (and how high the RPMs are) when I shift.

If I am careful, it will only grind occasionally, but it still does not feel like a smooth shift.  I don't know if this is a characteristic of the transmission, or a problem.  On some other websites people mentioned using Royal Purple (a synthetic transmission fluid) which seemed to help the problem. 

-Thank you for you reply.

[newfie]

mine does it too
i find double clutching it going from first to second HELPS greatly.