Getting rear ended but not really

I'm sure I'm not the only one to notice this..

You pull up to a stop sign or traffic light, a cpl seconds pass and it feels like someone rear ends you very slightly. Your truck shifts forward, or so it seems.

What is that? My 94' never did that.

 

Axle wrap.

 

My guess is the AC compressor kicking on...

 

Is it normal?

 

This.
If it was axle wrap op would complain that he feels it when releasing the brakes too.

 

Ahh ok, interesting. Nope doesn't happen when I release the brakes, just when I am at a standstill, and it's infrequent (prob when I recently turn on my AC apparently.)

Thanks

 

Get the same thing in my 11 so you're not alone, though I can't say I've looked into it.

 

When the compressor kicks in, the idle increases and the truck lurches forward. Don't even realize it anymore.

 

Wouldn't it just be the AT dropping into 1st once you're stopped?

 

Your defroster is on... the AC compressor is kicking in at times.