No 4th gear
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Overlanding
Joined: Sep 2017
Posts: 23
Likes: 0
From: Show Low, Arizona
Went to move rover to mess with TCM. It went right into reverse...
I still pulled the TCM. It is dry and clean. I put some dielectric grease in the "holes" on the plug to encourage better contact. All is working at this time. We will see what later brings.
I still pulled the TCM. It is dry and clean. I put some dielectric grease in the "holes" on the plug to encourage better contact. All is working at this time. We will see what later brings.
Last edited by James Weishaar Jr.; Jan 11, 2018 at 03:04 PM.
Thread Starter
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Overlanding
Joined: Sep 2017
Posts: 23
Likes: 0
From: Show Low, Arizona
sense 4th gear is working the way it should I will close this thread and start another for the trans not engaging. Thank you all who helped and made suggestions on this thread.
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
Could be XYZ.
When going along try to push the handle just a bit toward the "N" from D.
Just a tad. See if it goes into 4th.
If the brakes are dragging and there is LOAD on the drive train it will not go into 4th or Torque convertor lockup mode.
Lastly, the clutches are driven by solenoids. One of those could be sticky or the wiring is not providing enough current.
Make sure you put the ground strap between the driver;s side firewall and the cylinder head back on.
Make sure the battery is fresh,
Just a volt more in your system or more current to the transmission may just pull that clutch in and you'll get 4th if that is the problem.
When going along try to push the handle just a bit toward the "N" from D.
Just a tad. See if it goes into 4th.
If the brakes are dragging and there is LOAD on the drive train it will not go into 4th or Torque convertor lockup mode.
Lastly, the clutches are driven by solenoids. One of those could be sticky or the wiring is not providing enough current.
Make sure you put the ground strap between the driver;s side firewall and the cylinder head back on.
Make sure the battery is fresh,
Just a volt more in your system or more current to the transmission may just pull that clutch in and you'll get 4th if that is the problem.
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
On Discovery I there was a speed sensor.
On Discovery 2 there was a speed sensor which went into the transmission.
if that was off you would get trouble too.
If there is a cable from the accelerator to the transmission make sure that is adjusted correctly.
Don't remember if the ZF on the Discovery still has that cable but if it does then that
could do it too
On Discovery 2 there was a speed sensor which went into the transmission.
if that was off you would get trouble too.
If there is a cable from the accelerator to the transmission make sure that is adjusted correctly.
Don't remember if the ZF on the Discovery still has that cable but if it does then that
could do it too
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