range rover classic auto box?

[JIMBOBLY]

what do i need to do,to covert a 3.5efi 3 speed,to the zf 4 speed box,as in which torque converter flex plate and so on,and i have a 3.9 v8 engine,will the ancillaries such as starter and distributor fit the 3.5?,any help much appreciated

[Range Rover Blues]

Dizzy is a better unit but may have a different map.  The starter is fine as is the alternator and most other stuff.

Not familiar with the 3 speed auto but the crank is standard, the flex plate has an adapter which can be a swine to remove, held on with 6 cap headed screws, after that you need the various bits of the flex plate assembly, rather than guess wrong I'll suggest you look it up somewhere, it's been a while since I looked at one.

From memory though I think there is the adapter, starter ring then a hooge spacer followed by the flex drive plate and a reinforcing ring.
Ashcroft's now make flex plates from spring steel, worth fitting a new one.

I did have a spare one somewhere but if I ever get on with it I'm converting the LSE to P38 4.6 spec.

[James.Harwood]

I think the ZF 4 speed is controlled by the ecu, not sure about the 3 speed though.

[Range Rover Blues]

Not on a classic, it's the P38 that got the electricery box.  The 4.0 was basically the same with electro-hydraulic control and hte 4.6 got the bigger HP24 electronic box.

Look at Ashcroft's website for more info.