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Acceleration oddity...

SeanPwnery

Active Member
Nov 30, 2022
102
39
Truck Year
2016
So, I've put on a couple thousand miles now since I've got my fuel situation cleared up, tune installed, etc. I've always had this strange acceleration thing though - perhaps some of you experience it as well.

In 2wd, sometimes, not all the time, there's a little "slack" for lack of a better word accelerating from a dead stop. It's subtle, but when it happens, it's certainly there. It's almost like the feeling you get when a U-joint gets really old and has a little play in it, or as if the Ring and Pinion are worn and the driveshaft turns about 5 degrees before it "catches" and off you go. Normally that's where I'd start suspecting things, but the diff oil is clean and has very little grit in it for having 111k on the clock. Here's where things are a little stranger though.

In rainy weather, my truck loves to break the back tires loose even at the slightest hint of moisture on the streets, so usually I just put it in 4WD Auto, and that stops that. What it also stops is that little "slack" I was mentioning earlier. That only happens in 2WD. Not really sure what it is, or what's causing it. There's no strange noises, groans, bangs, whirrs, none of that.

Has this happened to any of you? Did you nail it down?

For what it's worth, it still spun the tires today on the way home... super wet blacktop, slightly uphill and a 90-degree turn from a dead stop - even 4WD can't always stop the madness when these engines hit peak torque almost instantly off the jump. :D
 
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