beefed up tranny would be servo shift kit, coverter, all the works.. i did checking myself by the time you install all these things, you could have saved that money and bought a trans from flt ... ive done research on this and this is the best conclusion i have came up with.. run the stocker till she breaks then call flt and get a good trans and never have to worry about it again.

 

4l60e-3 from flt is what im gonna order when mine goes its only 1,650 with core exchange...

 

OK, but I still don't see what FLT would do my shop cannot. And you not knowing my shop cannot see it either. FLT takes a stock core and replaces parts. They special machine some to match and such and are a VERY good place to get a good tranny no doubt.
Now I know FLT is a fine builder but a good local can do just as good for less if you know how to look.
My 4l60e is morphing into a built up 4l65e and the shop builds drag racing transmissions that are very reputable in these parts.