I looked at your PDFs.I didnt take you for an idiot?
I actually asked for more info, you treated me like I had no idea first.
You attacked me for not using google.
I showed you JLR official documents (right or wrong). You couldnt even bother to be constructive about them or question them.
Now to your issue.
To me it is possible/probable the gearbox ECU only looks at, gearbox speed signals along with signals from engine.
Your output shaft speed will not change in relation to the input/crank speed, you will just be going a little faster.
To me all the gearbox needs is difference between input/output shafts and engine speed/load demand, as programmed into the ECU.
Now will it hold 5th locked up is another thing, it probably would but the slightest incline may see it unlock and drop a gear.
We tow alot (well we did, not so much now) the L322 hated to shift into 8th, you either had to break the speed limt for towing, or flappy paddle it. But any twitch on the thorttle would see it change again.
J
While the gearbox has those two sensors it also has information about which gear it is in, the road speed of the car (from the ABS), the throttle position and the RPM of the engine.
I'm not surprised that the eight speed does not lock up easily given that it was probably intended to be used by people driving in Germany on the autobahn at higher speed.
The gearboxes are from ZF which is a German company so they would be made for the German roads.
Also Range Rover's are sold worldwide and there are many countries where the speed limit is higher than England.
I'm not overly concerned about the torque converter not locking up because I can get the answer using my OBD reader very quickly.
If someone has actual knowledge of ZF gearboxes and can tell me that my change will definitely stop the torque converter locking up than that is a different thing.
I'm not going to spend hours reading through technical manuals that don't answer the question when my OBD reader will do that.