2014 Prado - 5th gear problem

[Jleigh Lurker Find all posts View Profile Close Jleigh]

I have a problem with my gearbox, only happens after driving in 5th gear for 10mins or more, Then slowing down at an intersection or roundabout I then went to speed up to 100 again and the gear box refused to shift into 5th. staying only in 4th.

Trying to manually change the gears did nothing either, using gear shifter.

After i pulled over and selected park, i tried again. no change
i pulled over once again, turned off the vehicle waited few seconds, then the gearbox works as normal.

it only 'locks' into 4th after 'extended' use of 5th. It’s very intermittent, sometimes it will happen 1 or 2 times and day - other times it may happen 10 times.

This only start happening after my mechanic removed the EGR and blocked it up.

ecu was also retuned, however this was done 15,000km ago and I’ve had no issues. To rule this out I had the original tune file reinstalled, and that still didn’t fix it!!

Any help on this issue would be much appreciated

[carco Advanced Member Find all posts View Profile Close carco]

There’s couple of posts on this problem. Seems to be EGR connected.
Clearly tuners don’t fully understand the idiosyncrasies of the factory ecu.
Simply remapping and turning off the EGR would seem to upset the transmission computer.
Mine doesn’t have a blanking plate, the EGR is turned off in the ecu.
Might be worth looking into that?
Mine throws a tantrum every so often but nothing like yours.
Mine just decides to stay in 4th for ages, eventually realises there’s another gear and it’s all good.
If I start off in S and run it up to highway speed through the gears, no problem.

[money_killer Member Find all posts View Profile Close money_killer]

same issue here tune and egr del. but worth the extra power