Topic: Transmissions

[DaveOC]

For the benefit of those that don't visit the BB, this was my response over there:

OK, sometime during the 2007 model year builds, GM changed the way the rear of the transmission was mounted. Prior to the change, the rear was mounted to a frame crossmember. The change tied the rear of the transmission housing to the front of the differential housing via the use of a beam between the two units.

#9 in the following diagram is the beam that was added, which required a change in the transmission tail shaft housing and the differential front mounting.  This was an attempt to quiet the clunk that was present in a lot of the 2006 and early 2007 Kappas.

[Sly Bob]

And although it's stating the obvious to most here, the above stated beam was only on the cars with the manual transmissions and not the autos.