Stock converter lockup mph on a 3.4?

[shortdog273]

I did a search, but didn't find anything.

Does anyone know what mph the stock converters lockup at? I'm around 2500 rpms at 70 mph with stock 3.23s (as far as I know) and stock size tires. I'm around 2000 rpms with 3.23s in my other fbody. Is this normal for the 3.4s or maybe a bad lockup clutch?

I just bought this car for a daily driver and I'm still getting to know it.

[3.4grapeofwrath]

Re: Stock converter lockup mph on a 3.4?

Torque converter lockup is controlled by the ecm inputs. Transmission temp, line pressure, engine rpm's, gear select, TPS position and mph. The T/C clutch solenoid is what the ecm activates for lockup. There are many variables but I would say between 2,000 and 2,500 rpm's sounds about right. Clutch shudder and slipping would be related to the clutch itself. Clutch not engaging or not releasing would be a problem with the clutch solenoid, which should throw a code. Something else that might affect the lockup would be a dirty trans filter.

[ssms5411]

Re: Stock converter lockup mph on a 3.4?

Don't know on a 3.4 on the 3.8 its 1800 to 2200 depending on the later model A4. With 3.73 gears mine shift at around 3200 RPMS out of 2nd ,3rd, 4th

[shortdog273]

Re: Stock converter lockup mph on a 3.4?

3.4grape, good info. Thanks.