Seems funny that they would be different front and rear..... must be a $$ thing. I think mine must be ATE in the rear too, I assumed they were Bendix because of the fronts but they really aren't marked (and I've never looked that close at them) so that sounds like ATE from what Irg says.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k