Originally Posted by NA BLUR
Interesting, didn't know 545's could be retroed for locking OD. There are some cheap local front engine TC 2000's with 5.9L Cummins and 545 tranis. Is a DT466 a drop-in replacement?
The AT545 can be retroed with a lockup torque converter. It will, however, remain a 4spd gearbox with a 1:1 top gear. Essentially, the 545 becomes a 643.
The DT466 should go in a TC 2000, but it won't be "drop in". Not sure if motor mounts are available or would need to be fabricated. The AT545 is an SAE 3 unit. The others are SAE 2 as is the DT466. In other words, a new bellhousing will be needed (they exist). And you'll have to make sure it all hooks up fine with the diff. Sounds really expensive to me.