transmission slip on driveway slope

does this happen to everyone else? or just me?

I back out of my driveway (on a pretty good slope for a driveway). I come to a stop and try to go forward again. The transmission clicks and slips. my mechanic could NOT reproduce the problem, but i could reproduce it over and over again. he also said, since it didnt generate a code, he had nothing to go on. my first toyota brand vehicle in the family, so maybe this is normal? Never happend to my dakota / 300 / civic / outlander sport .. so not sure why its happening to my tacoma.

2018 trd off road long bed
4wd - 6cyl

 

Hmmm, I noticed you didn't engage the parking brake when you put it in park. Do you leave it on the driveway like that?

 

Mine does it when it starts to roll backwards on a steep slope then I hit the gas. I figured it was like the brake/gas over-ride nanny toyota installed after the prius issues.

 

It’s the hill start assist feature

 

yes sir.. i do

 

feature ? oh man.. if your right.. im gonna be pretty embarrassed.

 

Yeah, that's normal. Just the 'hill assist' feature. When you're at an angle and let off the gas (while in drive) and start to roll back, that kicks in.

 

This happened to me on a very steep inclined driveway. Gave it more gas and it it just went. didn't know if it was transmission slipping or traction control coming on.

 

Yup it’s a feature. probably why your mechanic couldn’t reproduce.

 

Welcome. Sorry you're having this problem.

That sounds like crap...

Mechanic couldn't duplicate so did you show them the video?

Also, I would recommend reading up on posting here - Year, Model, Drive Train, 2 or 4 wheel drive.... that kind of stuff. People are going to ask so it's helpful to be proactive..

Edit: Yeah, I don't have a third gen so I prolly should not offer an opinion...still sounds like crap IMHO

 

I would try parking with the PB engaged - engaged before letting your foot off the brake. And try the procedure and see if that changes anything. I for one never park anywhere without the PB engaged, especially on a slope.

 

Forgot about the hill-assist feature......

 

Hill start assist in an auto is silly. That would have alarmed me also.

 

Told the mechanic, he couldn't reproduce, so i shot a video when i got home. he hadnt seen it yet.

Yep.. you're right about the info i should supply
will edit my first post
thanks!

 

That happened to me on a speed bump at the local grocery store once. Freaked me out but I figured it was some type of assist feature. I was able to reproduce it and confirm it so I stopped worrying.

 

Problem solved, Ivennard.

 

Appreciate it gang! you guys made me feel a lot better.. me being embarrassed is way better than me being truck-less.
Much thanks !!

 

This just happened to me for the first time on a trail in 4hi...wondered what was up. Glad to hear it's not just me lol.

 

I don't think so; slip indicator light didn't come on.

 

totally normal. On a steep incline there isn't enough power going through the torque converter at idle to hold you so you roll backwards. The hill assist kicks in and pulses the brakes (the noise you hear that sound horrible but is actually also normal) to keep you from going backwards out of control or some other situation a lawyer thought of. Freaked me out the first time it happened but now i know to just jump on the pedal. for me its about 12% or greater incline but ymmv