Go Back   The Navara Forum > D40 > D40 Drive Train

Reply
 
Thread Tools Search this Thread Display Modes

Gearbox jumps back to "D" TCL pulls in all the time
  #1  
Old 03-10-2019, 11:55 PM
allaroundoz allaroundoz is offline
Junior Member
 
Join Date: Oct 2019
Location: Sydney
Posts: 16
Default Gearbox jumps back to "D" TCL pulls in all the time

Hi,
we are a traveling family and I have just introduced us as new members here.

I will have to start a few posts as various issues on engine, drive train and electronics occur regularly.


#1 GEARBOX JUMPS FROM Manual to DRIVE
Since Kakdu NP I experience the gearbox to jump from 4th (our preferred gear for towing). Especially after long drives, hilly & winding roads or sometimes without any further notice. No mather what I do with the gear lever, I can not switch back to "manual automatic" as gearbox stays stubbornly in "D". Pulling over, restarting the engine solves the issue but sometimes only for 3 minutes.

#2 TORQUE CONVERTER LOCKER PULLING IN/OUT
At the end of crossing Nullabor our car has developed a strange behavior. When driving in 4th gear (automatic) I experienced the revs going up by roughly 300 every 2 seconds, dropping again and going up again. As far as I have found out it the Torque Converter Locker that is pulling in and out all the time. Annoying, is there anything we can do about it?

Any idea on issue #1 as changing gears is vital for us especially when approaching a hill as towing a van requires 3rd gear.

TIA!

***
driving a Nissan Navara D40 2010, ST (Spanish model), 4WD, automatic, Diesel
167.000 km, all services done, ex-mining car, not a rocket while towing our van
Reply With Quote
Sponsored Links

  #2  
Old 04-10-2019, 11:22 AM
Old.Tony's Avatar
Old.Tony Old.Tony is offline
Administrator
 
Join Date: Oct 2009
Location: Mid Coast Region, NSW, Australia
Posts: 15,182
My Mood:
Garage
Default

We tow a 2.5T van a lot too, and I usually just leave mine in drive. There was a glitch with the STX550 gearbox programming where it would slip to auto mode from manual but that was usually only when 4LO was engaged. It is possible the glitch occurs for other reasons. There's no real reason why you can't drive (on flat ground) in top gear. When climbing hills, I manually change to a lower gear, but it's 'D' for everywhere else.

The TCC engagement depends on several factors, usually the most important ones are vehicle speed and engine load. Engine temperature does play a part and this might be where yours is struggling. After the temperature problem is solved, you might find this one fixed too.
__________________

Check out the FAQs by clicking here!



"Money can't buy happiness, but it does make misery a lot easier to deal with."
Reply With Quote

  #3  
Old 08-10-2019, 12:57 AM
allaroundoz allaroundoz is offline
Junior Member
 
Join Date: Oct 2019
Location: Sydney
Posts: 16
Default

I can tell that the engine gets warmer in "D" (maybe it uses 5th gear) than driving in manual 4th, that's why I prefer manual AND I am better in charge dropping a gear when approaching a hill. But maybe it's also because all my car I ever owned where manuals rather than automatics ;-)
Reply With Quote

  #4  
Old 08-10-2019, 04:33 AM
KevinE KevinE is offline
Senior Member
 
Join Date: Dec 2011
Posts: 373
Default

Yes, the drive line will get hotter towing in D, because the torque converter will keep unlocking, generating slip, which generates heat. I think that you're wise to tow in manual mode.

There are a number of things that could be causing it to jump into D when you are in manual mode, the most likely of which are; 1) your AT fluid is too low, or needs changing (flushing), along with the filter being changed. 2) you have a switch playing up somewhere, or bad wiring, in the AT, or in the PRND/manual selector.

The 1st thing I'd do is check that all of your tyres are the exactly the same & that the tyre pressures are exactly the same. Then I'd drive it where it's safe to do so, in reverse (not towing) in 2WD for at least 50 metres.

Good luck with it!
Reply With Quote

  #5  
Old 12-10-2019, 01:29 AM
allaroundoz allaroundoz is offline
Junior Member
 
Join Date: Oct 2019
Location: Sydney
Posts: 16
Default

I just had the entire transmission flushed (not just a oil change) to provide good viscosity to the system. Didn't help much ;-(
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 12:18 PM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
| Home | Register | FAQ | Members List | Calendar | Today's Posts | Search | New Posts |