Fidanza users

[Ccmano]

Originally Posted by Jagdpanzer

Next time you have the transmission out wouldn’t hurt to check the mounting flange bore and face runout with a dial indicator on both the transmission and bell housing.
A while back I was tracking down an unusual whining noise a ZF transmission was making in the lower gear ranges. This particular transmission came out of a wrecked ZR-1 that had 5K miles. Found one of the bolting ears on the main case to be slightly bent that introduced an angular misalignment on the input shaft which caused the input shaft bearing to whine. Machined the ear to correct the angular misalignment solved the whining noise problem.

Interesting thought Phil. Considering both transmissions exhibited the same sound, in your scenario it might be more likely that the bellhousing is off. I will try that next time.
H