I just purchased a new radiator. I am replacing my current one which leaks from the upper neck area. Upon inspecting the new dealer unit, I notice that inside both transmission fittings, there are fluffy white, loose powder-like deposits that resemble corrosion. This makes me nervous about severe damage to my transmission, to say the least.

My manual and all knowledge I have gained so far on automatic trannys indicates "even the slighest impurity may cause operational troubles".

Has anyone seen this substance in new radiator tranny lines?

Thanks in advance,

Blake
'86 300E 264,000 miles