I dunno firsthand, but this is what I read on the aforementioned diff info page.

Quote
This diff cannot be fitted to an older style 8" axle because it uses a larger diameter mounting bolt pattern and because more space inside the housing necessary to accommodate the large bearing cap. The different bolt pattern also makes it very impractical to swap in an electric locking Toyota diff (the whole mounting flange would have to be re-done using a special jig).


It will probably forever be known as an 8.whatevertf even though manufacturers now list it by model. A lot of parts listings I see omit T100 and just list Tundras, Tacomas and Sequoias.

~Adam


96 T100: D44, lockers and stuff