Quantcast

Intermittent issue with 7sp auto in manual shift mode

The Navara Forum

Help Support The Navara Forum:

CHORIPAN

Member
Joined
Jun 9, 2020
Messages
4
Reaction score
1
Has anyone had an issue with their 7sp auto not activating the manual mode when shifting across? On the odd occasion, when I shift across, nothing happens? Then the next day it will?? Any ideas.

Thanks
 

landmannnn

Well-known member
Joined
Sep 24, 2016
Messages
52
Reaction score
2
Location
UK
There are some microswitches in the lever housing that could cause this.
 

Wizard600

Member
Joined
Jul 28, 2020
Messages
3
Reaction score
0
A friend of mine had the same issue. Checked micro switches by gearlever. There are 3 of them. If they are tested and working fine your other option is to get a complete cluster. Gauges and all. That was the only thing that solved his problem. He got a cluster which had 2000km less on than his original
 

Old.Tony

Administrator
Administrator
Joined
Oct 3, 2009
Messages
15,434
Reaction score
33
Location
Mid Coast Region, NSW, Australia
It does depend on WHEN you're having the issue. This might not be your situation, but just in case it is ...

We noticed that the gearbox doesn't behave properly in 4LO - during some steep descents into creeks in 4LO, the car would pop out of first and into second, reducing the engine braking and requiring more foot braking. In 4HI and 2HI it never does this - manual mode stays strictly "manual". It's only in 4LO that the gearbox ignores the setting.

One user here (Raptorthumper, if memory serves) found a solution to the problem, although it's not ideal for everybody. Disconnect the servo plug from the back of the transfer case, and connect it to a switch which allows you to apply momentary power. 1 second of power will turn the servo 90 degrees or change the transfer case from 2WD to 4WD. A further 2 seconds of power applied would turn the servo a further 180 degrees, changing the ratio in the transfer case thus engaging 4LO. Done this way, the gearbox and the car's ECU have no idea at all that the gearbox has been manipulated and manual mode works as expected.
 

CHORIPAN

Member
Joined
Jun 9, 2020
Messages
4
Reaction score
1
A friend of mine had the same issue. Checked micro switches by gearlever. There are 3 of them. If they are tested and working fine your other option is to get a complete cluster. Gauges and all. That was the only thing that solved his problem. He got a cluster which had 2000km less on than his original
Cheers for the info
 

CHORIPAN

Member
Joined
Jun 9, 2020
Messages
4
Reaction score
1
It does depend on WHEN you're having the issue. This might not be your situation, but just in case it is ...

We noticed that the gearbox doesn't behave properly in 4LO - during some steep descents into creeks in 4LO, the car would pop out of first and into second, reducing the engine braking and requiring more foot braking. In 4HI and 2HI it never does this - manual mode stays strictly "manual". It's only in 4LO that the gearbox ignores the setting.

One user here (Raptorthumper, if memory serves) found a solution to the problem, although it's not ideal for everybody. Disconnect the servo plug from the back of the transfer case, and connect it to a switch which allows you to apply momentary power. 1 second of power will turn the servo 90 degrees or change the transfer case from 2WD to 4WD. A further 2 seconds of power applied would turn the servo a further 180 degrees, changing the ratio in the transfer case thus engaging 4LO. Done this way, the gearbox and the car's ECU have no idea at all that the gearbox has been manipulated and manual mode works as expected.
I have only noticed it during normal driving, only because I do more of that than offroad. Just last weekend coming back from Oberon and going up the steep hill along the Great Western Hwy when leaving Lithgow, I thought I would play around with the manual shift mode, and nothing happened. Tried it the next day and it worked?
 

raptorthumper

Well-known member
Joined
Jan 31, 2013
Messages
117
Reaction score
0
Location
Bendigo
Read this thread. It is the instrument cluster needing a reset.



_




Hi all. Guess what. I also had the exact same problem with manual mode not working intermittently. After some months not at all actually... (tiptronic not working)
It's now fixed AND I didn't replace the instrument cluster.

I pulled the instrument cluster out and inspected it and pushed on all the components and looked at the soldering. Nothing that I could see as a bad solder joint or blown component using my phone's camera magnification.

I put the cluster back in and the theft light came on briefly before going out. Went for a drive and everything is working perfect again.

I believe the power cycle did a full software reboot and fixed the problem. You need to remember that this is a CAN bus network going to the auto transmission and a digital message is what tells the transmission what it should try to do.

I don't think anyone needs to replace the cluster. Just pull it out press on components if you want to and put it back in after 10mins.

Now I'm wondering if just pulling the battery terminals off for a while would of fixed this???

___
 
Last edited:

Latest posts

Top