I read the thread about how long your 4L60E has lasted, but I noticed something. Most of you stated that it was good until you did something to get more power out of it via H/C, FI, or spray. So I would like to know:

Mileage of power add-on
Mileage of failure and what failed
RWHP (if available)
Engine Mods
Preventive Measure on Tranny (if any. meaning oil coolers, shift kits, upgrade parts, fluids)
Stall, Gears and Tires (slicks would tear it up faster)
How much Street-time/Strip-time

I am trying to see if people are thinking about their trannys when they add more power to their car.

 

No one wants to contribute some info?

 

I'll try to get this started, but my case was a bit different.

Mileage: 62,750k
Failure: 64,150k
RWHP: 315-400+
Mods: H/C, Full Boltons w/ Fast Intake, 24GVW Tranny Cooler
Strip Time: Around 25 passes
Stall/Gears/Tires: Fuddle 3600 2.2str, 2.73's, BFG DR's 255/50/16
Driveshaft Failed on Dyno. Probably a result of Improper Driveshaft Installation.
Result: Trashed Driveshaft, Torque Arm, Tranny Case.

Case was trashed along with the low reverse piston. The rest of the Tranny was inspected, everything else looked excellent, There was a little wear on the clutches, and cracks on the apply Band, the pump filter was dirty, but everything else looked clean.

 

Mileage: 38K
Failure: none yet
RWHP: 416
Mods: Heads/Cam/Boltons
Preventive Measure: Tranny Cooler
Stall/Gears/Tires: Fuddle 3800/ 373 Gears/ MT ET streets 26x11.5r16
Strip Time: 15 passes