Going uphill noise?

So while going uphill when I come to a full stop, and then when I hit the throttle to go up from zero speed, suddenly the traction control light shows up and then there is this clicking noise from the parking brake. It happens when the streets are wet, and I feel like the rear wheels slip. Is this normal? This only happens when I'm going uphill from 0 speed

 

It is very annoying, should I turn off traction control when I'm stuck uphill waiting for the red light?

 

This happens to me if i let it roll back a little on incline about 25deg at a red light have to step on the brake & start over with both feet 1 on gas & 1 on brake. never thought to shut off the trac control, i have to see if i can shut it off more things to check in manual.

21 TRD ORP

 

Normal. Happens all the time driving in SF.

 

Then you don’t need to shut the trac control off.

 

Do you know why it happens? It doesn't happen on modern Toyotas like Camrys and Rav4s. I know 4Runner is not modern, but what is it missing?

 

Seattle is only second to San Francisco when it comes to Hills so this is happening to me quite often

 

Next time I am going to switch to 4hi and let's see what happens

 

It’s the TRAC system (not A-TRAC) kicking in when detecting wheel slip. From the Owner Manual:

 

Ah, I see. Thanks! I love my 4Runner even more