Hello from Germany.
My name is Andreas and I`m driving a LR Discovery-Range Rover Hybrid, which I build for myself as Sahara-Desert-Travel-Vehicle. :-)

After searching the web for hours, I decided it might be the best way, to ask other LR enthusiasts in this forum directly.

The story in short words: I`ve tuned my 300tdi with a microprocessor controlled VNT turbocharger, which gives good torque at lower rpms. After having fun with the good R380 tranny, I`m going to convert it to an ZF autobox. - The good old ZF4HP22. But to match the new torque-range of the engine more efficent, I`d like to use the medium torque converter from the 3.9 / 4.0 V8 petrol engine. This TC has the code D19 or partnumber stc3600, if i`m right. Many people suggest doing this, but here starts my problem. Yes, it fits inside the 300tdi autobox bellhousing, like the original small "U17" TC, but the TC bold pattern ist slightly different (smaller, wont fit the 300tdi flexplate) and the "pilot pin" (which centers the TC in the crankshaft-flange) is also much bigger. And I think, the offset of the TC inside the bellhousing is even different. (300tdi = 18mm, V8 = 27mm - according to the 3 digit box code comparison)

Is there a bold-on way to do this? I studied Dave Ashcrofts page, but found only clear informations, that the big 4.6l V8 converter will not fit and it needs the ZF4HP24 bellhousing plus an adapter kit from mdengineering (including new boss plate). But noting really specific about fitting the medium one. I think redrilling the original flexplate, machining the middle pilot pin of the TC and using some kind of 9mm spacers isn`t the answer. Or is it?

Would be nice, If some can help me at this project with some informations.

To illustrate the problem, here the TC differences in pictures.

1. The D19 medium V8 converter (out of a GEMS 3.9l V8 Discovery)
Image is taken in the original V8 autobox, which I will not use for conversion. (wrong bellhousing and shiftpoints)


2. The U17 small original 300tdi TC


(Klick for bigger image. I tried to avoid fullscreen images in the first place)

Thanks a lot,
Andreas