trans upgrade?

[Roy02]

i want to rebuild my trans and i dont know what parts to buy i have a 2002 gmc yukon 4x4 4l60e i would like to build it on the more aggressive side what should i do ?

 

[02DFWTahoe]

I would buy a transmission from a reputable builder that comes with a warranty. Performabuilt seems to be well regarded, and a lot of their transmissions come with a 2 year warranty.

 

[5280Racer]

I built my wife's when it took a poop around 153,000 did the red kolene clutches and power pack. corvette servo, upgraded the pump and shift kit. then a Boss Hog towing converter... if its empty just me or her driving full throttle it will bark 2-3 shift!