I am going to build a TH-400 for the Cat, and I want this to be the last one it will need. I want to include the best features of all the years in one trans. The early trans had metal thrust washers and a sprag type clutch, but needs the center support machined for the late model case to support spacer. The late trans has the center support spacer but also has the undesirable roller clutch and plastic thrust washers. Aside from finding a '70 trans, which has all the "good stuff", is it better to find an early core and modify, or start with a late core and then have to find the sprag type clutch drum from an early trans? I have the capability to machine the center support and I will use roller thrust washers if that means anything.
Thanks
|