lol Posted October 13, 2019 Share Posted October 13, 2019 I’ve got a 4.6 p38 as a potential engine/gearbox donor for another Land Rover based project but my question is how can I get the drive to the diffs of a normal Land Rover as on the p38 there on the opposite side,wondered if a 3,9 v8 transfer box would fit onto the p38 gearbox? many thanks Quote Link to comment Share on other sites More sharing options...
smallfry Posted October 13, 2019 Share Posted October 13, 2019 The P38 gearbox is electronic shift. Assume you know that ? Yes it can be made to fit, but you will need the tail housing from a RRC, Disco 1 or 2 V8 Auto. Then, you either have to cut the existing shaft, drill and tap the centre and fit the RRC/Disco extension shaft, OR strip the gearbox and swap the output shaft from the same. Its fairly simple, but pictures will explain better, but unfortunately I do not have any. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 13, 2019 Share Posted October 13, 2019 Or just fit it is a V8 disco autobox, the hp22, which is a non-electronic box. Quote Link to comment Share on other sites More sharing options...
lol Posted October 13, 2019 Author Share Posted October 13, 2019 Ah thanks for the replys chaps,didnt know about the electronic p38 shift but glad I asked now ive also got a disco 2 v8 auto coming my way but is this the same setup? Quote Link to comment Share on other sites More sharing options...
smallfry Posted October 13, 2019 Share Posted October 13, 2019 That will be the right configuration physically but will be an electronic shift (I think ?) 4HP22, which is not really up to a 4.6 Engine will be a 4.0, unless it has been changed, which again will be all electronic, and will require aftermarket engine management. You could convert to distributor ignition, and an earlier injection system, but IMO this is a step in the wrong direction. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 14, 2019 Share Posted October 14, 2019 Your easiest option is a V8 gearbox from something earlier - any V8 box will work you just need to swap flywheels to suit. That said, I don't think the electronic-shift boxes are rocket surgery but I've not had access to one to play with to really find out. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 14, 2019 Share Posted October 14, 2019 The HP22 is fine with a 4.6 as long you don't go entirely mad with it. You can get much cheaper/easier autobox controllers these days, CompuShift was at one point about the only one, and it was £1K. You can DIY one for under £100 I reckon. Quote Link to comment Share on other sites More sharing options...
lol Posted October 16, 2019 Author Share Posted October 16, 2019 Thanks for all the info guys,looks like the search continues for a 3.9 auto to use/butcher for the easy option Quote Link to comment Share on other sites More sharing options...
Tobias Posted October 20, 2019 Share Posted October 20, 2019 Bowie can you tell more about cheaper Transmission controllers, please? 1 Quote Link to comment Share on other sites More sharing options...
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