Originally Posted by lmanzanares
I actually found it interesting that Autozone has two different fiters for the 4R100. The TF325 (deep pan) and TF350 (shallow pan), in which after removing mine ended up being the deep pan version even though it is a stock pan.
It isn't only a stock vs. aftermarket pan question, but also a 4x2 vs. 4x4 question.
Obviously there are aftermarket pans that increase the fluid volume and these may dictate one filter over another. I just installed Mag-Hytec's deep pan which specifies the "deeper" pickup filter.
There are however two diferent filters for completely stock tranys as well. The 4x4s have a deeper pan and thus a deeper pickup on the filter.