Stall speed testing questions

[robshu145]

Trying to figure out recommended stall speed for a stock 2013 Silverado 4L60E 4.8 and trying to find more detailed information on how to perform a stall speed test should I turn off traction control to perform this any help would be appreciated

 

[Tman220]

Brakes on, accelerator pedal to the floor, tires not spinning. The Rpm you can achieve is the stall speed for that particular setup. The same converter behind a 5.3 with more torque would stall at the higher rpm.

 

[robshu145]

Any idea what specifications for stall speed would be

 

[Jetronic]

it's about 2/3rds to 1/2 of the redline.

 

[Tman220]

Any idea what specifications for stall speed would be

For a stock 4.8 from that era it seems the consensus is about 1400-1600

What is it you are trying to do?

Make it quicker? Did you modify the engine in a way that reduced low end torque and trying to take advantage of more top end power? If you were racing the truck then they typically recommend a stall speed about 500-1000 rpm short of peak torque but a stall that high on a daily driven 4.8 would be horrible and make a horrendous amount of heat, and probably destroy the lockup clutch pretty quickly.

 

[clinebarger]

It would be a low stall TMBX code 300mm converter...Same as the 5.3L & 6.0L 4L60E/4L65E used in earlier model full size trucks/SUV's.

4.3L V6 trucks had a little higher stall.

The TMBX is the most reliable lock-up converter GM ever made....I'd leave it be.