According to TCI, there are three different 3000 stall converters for the 93-97 4L60E tranny.

One which is non lock-up
One with is lock-up
and One which is lock-up w/ lock-up assembly

I'm pretty sure I want a lock-up, but which of those two types do I need?

Thanks In Advance

 

http://www.tciauto.com/gm/gm_4L60E.htm

243107 for the more efficient 10" 28-3200

243106 for the funny looking 10" with the 12" lockup (higher capacity) 32-3600

 

the 243107 is a 2400 stall, not 28-3200.

but what is the difference between the 243105 and the 243106?

on top of that, which one does everyone buy?

 

Well then the 243107 must be tighter than it is on 3 speed transmissions. Its a 28-32 stall in most 350/400 applications. The 243105 is a native 10" converter w/10" lockup assembly.