Thread: ZF lockup 3.9 (96 disco)

No electronics, purely mechanical.
There is a mod that can be done so that you can get lockup in 3rd gear which is a better option for towing.
About $800 drive in/drive when I enquired about a year ago.

Steve

ok,
i Have to discoverys with different gearing, but both go into lockup at 82 kph, so thats where i got the hope it may have triggered from the speed sensor or something

Hi,

Some sort of centrifugal switching type arrangement from what I've been told, and all mechanical which is a shame in a way.

It would be nice to be able to mod the autos so you can select if you want the lockup or not as has been done with the cruiser 5 speed and others with electronic triggered lock ups.

Turn it on in first for downhill descents to aid with engine braking and then keep it out for towing in some situations....

If only the missus liked manuals?

Originally Posted by pando

Hi,

Some sort of centrifugal switching type arrangement from what I've been told, and all mechanical which is a shame in a way.

It would be nice to be able to mod the autos so you can select if you want the lockup or not as has been done with the cruiser 5 speed and others with electronic triggered lock ups.

Turn it on in first for downhill descents to aid with engine braking and then keep it out for towing in some situations....

If only the missus liked manuals?

You could always do a D2 box and compushift....
Might be cheaper than a new missus

Steve

Originally Posted by roverv8

ok,
i Have to discoverys with different gearing, but both go into lockup at 82 kph, so thats where i got the hope it may have triggered from the speed sensor or something

You may have different gearing/tyre size, but the speedo will still indicate the same speed to the speedo and the lockup will operate at the same speed indicated.......just your travelling at a different "actual" road speed

Originally Posted by pando

If only the missus liked manuals?

Thats exactly it!!
I used to have an 89 RRC, 3.5 with a 5 speed, great for towing just leave it in 4th, sometimes 5th on the flat
Missus hates driving a manual,

Originally Posted by rovercare

.....just your travelling at a different "actual" road speed

road speed is the same, different RPM

Originally Posted by roverv8

road speed is the same, different RPM

82km/hr indicated on the speedo, unless you've changed the gear on the speedo head will lockup the convertor, doesn't matter if you've altered gearing there after at all, the rev's will likely be the same, the tacho is driven from the alternator field winding, not the negative of the coil like it should, so its very easy to have discrepencies