I just did a cluster upgrade on our project, spedo only to SR5, plug and play, very nice. <img src="/forums/images/graemlins/kewl.gif" alt="" />

I had noticed the old temp gauge jumping up rather soon so I took the time to clean the contacts on the 'new' one (no star washer though) before install and the problem went away, now I have a smooth climb as the temp rises.
Just to see I took the old cluster, cleaned it and hooked it back up and what do you know, smooth as silk.

SO, if you have temp indication problems this is definitly the first place to look.