Crazy Stock Converter

[Tyler F]

Hey I was searching for a little info on stock stall speeds and came up with around 1800-2000rpm. On my car i can rev it up to 2800-3000rpm all the time when brake stalling. My friend has a 97 non Y87 auto and his is at 1800, so i'm wondering what is going on. The car was stock to my knowledge when it was bought. My speedo and Tach seem to be accurate as well.
Any ideas?

[Tyler F]

Have done some more looking and have found that slp has a 2800 stall converter that keeps the stock lockup, would that be what i have?

[xjarayax]

Those are for the V8's.

[Ex-5.0]

The GM parts manual lists different torque converters for GU4 (3.08) and GU6 (3.42).

Apparently, the GU4 cars have about 1800 RPM stall and the GU6 cars have a higher stall. I've never seen an official spec on exactly what RPM and opinions vary.

I tested my car when it was quite new and it brake stalled to about 2400-2500 RPM, maybe it might go a little higher now because the motor has loosened up a bit since then. I'm sure it's not as high as 2800-3000 RPM.

I occasionally drive my mom's 95 Bonneville that has a FWD series II L36 motor and 3.06 axle. It will brake stall to 3000 RPM. This converter feels quite a bit looser that my Camaro's converter. For example, it has almost no creep from a dead stop and the car will roll backward when in gear on just a slight uphill grade! I'm surprised that GM would build it that way but it does launch powerfully, easily breaking loose the front wheels.

If your car's converter is stock maybe your tach is a bit off or there is some slippage in the tranny or your tires are actually spinning while your're trying to brake stall.

Hope this will be of info.