Yo. I am new here, so this will also be my 'hello I'm a noob post'

Anyway, I have a 2001 MC SS with the standard 4 speed automatic.

Or do I? It will shift four times out of first. Meaning it actually has five gears.

I have tried Google, but cannot word the question right. What makes it shift four times?

 

What? lol it has 1st-2nd-3rd-4th... there's overdrive...

 

You are probably feeling the torque converter lock-up and assuming it's a gear change. Or you have a transmission going bad.

You have a 4-speed.

 

It's not a feeling, I actually watch the tachometer drop into a higher gear. I'll shoot a video later and put it on YouTube.

 

shoot all four... you only have 4 gears

 

Its the transmission overdrive/ lockup... 4 speed...No 5!

 

yeah your deff mistaking

 

Thats an easy one- torque converter is locking up. It is a 4 speed transmission.

RPMs drop when the torque converter locks up just like a gear change because you eliminate slippage/inefficiency from one side of the converter to the other.

 

Agree. You are mistaking the converter lockup as another gear. You have a 4 speed.

 

Thank you very much. I didn't think the converter locking up could cause the RPM to drop. This helps a lot.

At what rpm does the converter usually lock?