I've been noticing that my d/r 5 speed makes a chattering noise when cold. Usually it's got to be in the single digits or less, when the car is first started it makes the noise. Is sounds like its coming from the bell housing/transmission, and it only happens in neutral with the clutch let out. As soon as I press the clutch, it goes away, and when it's in gear it doesn't seem to be making the noise. It still could be, but maybe I can't hear it over the road noise. When the car warms up, it's gone. The transmission came out of my old 86, I swapped it in this car over the summer. I did not change anything, clutch or throwout bearing, except for the tranny fluid. I don't remember this noise when it was in my old GL, but i didn't use it much as i'm using this car. A little google research says it could be gearbox rattle, anyone else experience this.

As long as the tranny oil is full you should be ok. My 86' likes to howl when the temps get down in the 20's until it gets warmed up, of corse I'm chattering too .

 

Ed