transmission slip, down hill

simple

simple

Senior Member
A few weeks ago I was driving down hill, and my engine started reving at like 3k rpm with my foot off the gas. I wasn't sure what was going on, but I pressed the pedal lightly and the engine kinda rev'd but not as pronounced as if the car was in neutral, but there was no response from the car as far as propulsion. And in a few seconds, the car acted normal again. Any body experience anything similiar? 2015 with less than 5k miles
 
Register to hide this ad
I experience it almost every day coming out of my neighbourhood. There's a stop sign and when you turn right it is downhill. Push gash, rev, no response, and then it catches.
 
simple said:
A few weeks ago I was driving down hill, and my engine started reving at like 3k rpm with my foot off the gas. I wasn't sure what was going on, but I pressed the pedal lightly and the engine kinda rev'd but not as pronounced as if the car was in neutral, but there was no response from the car as far as propulsion. And in a few seconds, the car acted normal again. Any body experience anything similiar? 2015 with less than 5k miles
Click to expand...

Hi simple,

I wouldn't worry about it. The transmissions on todays 4Runners aren't controlled like the cars in the eighties; which were independent (stand alone) and were controlled Hydraulically and pneumatically (vacuum servo). These trannies "Have brains" and are controlled (in part) by the powertrain ECU, and does much calculating and considers, load, speed, pitch, RPM, torque, (I think even fuel economy becomes a factor at some point). It was likely calculating when you expected it to slow you down...! It's probably okay, unless you're having other problems with it; then I would suggest having it checked! Rgds
 
It's just how it's programmed... they're sluggish on take-off, they hunt for gears in Cruise Control, and they tend to have odd downshift patterns. Apparently that's how you program a transmission for "Eco" driving?

Cynicism aside, it's odd, but normal for these vehicles and other Toyota's it's just how it deals with downshifting.
 
Also, If you are going down a steep hill, you can hit the brakes one time, and that will cause the tranny to downshift and hold the gear. It helps you hold speed down the hill without riding the brakes. Awesome feature.
 
Friggin Idiot said:
Normal operation.
On a recent trip through the KY/VA/TN mountains I found that it would not do this in Sequential shift mode, even if sitting on 5.
Click to expand...

Another plus for "S" mode. I'm always in it, with 4th my top around town. I have to say I don't really notice the tranny qwerks everyone talks about. Except CC hunting on the highway.
 
When I try to back out of my downhill driveway from parked position I have to hold the brake till the last second and then push the accelerator fast and hard to get out without rolling down the driveway,

is that normal for 2002 4runner
my car has the manual gear and the automatic gear, never used the manual gear.
>300K miles unfortunately very poorly maintained if at all.

was trying to save it as it has some sentimental values but if the transmission is shot and dangerous there is no value in dying in this car...
 
As others say, it's normal, and a good idea IMO. My 2019 is the first vehicle I've ever owned that downshifts like this.
 
You must log in or register to reply here.

Members online

Total: 381 (members: 5, guests: 376)

Forum statistics

Threads
278,310
Messages
3,554,080
Members
248,016
Latest member
Advally Service

Share this page

Trending content

Back
Top