RHD sourced 1HD-FTE swap into 1HD-T fitted LHD 1994 HDJ80 (1 Viewer)

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Hi all, first post on the forum so please let me know if I've put this in the wrong place/omitted key info.

Question: How difficult/realistic would it be to swap a 1HD-FTE (with trans, original wiring loom etc.) originating from a RHD UK-spec 100 Series into a LHD European spec 1994 VX Land Cruiser Auto with a 1HD-T)

The recipient truck almost certainly has a blown engine and I have singled out the 1HD-FTE for EXTREMELY specific reasons (read the long preamble below if you're interested in why)

I'm aware this broad category of swap has been performed successfully by others. My main questions are as follows.

  1. Obviously a custom wiring loom is required as the FTE is electronically fuel-injected and the -T is not - I've read on here that a company in Australia can produce these? Does anyone know if they're still in business and if so how I can get in touch with them. If not does anyone have a wiring diagram for such a loom?
  2. How difficult is the packaging of the intercooler in the 80-Series shell? Most of the engines I'm seeing for sale in the UK are from HDJ100 models which I believe came with the intercooler so this would have to be retained for the swap.
  3. Would it be best to retain the original 4-speed auto OR use the newer A750E from a 100 Series, in either case which modifications are required to get the whole assembly to fit together?
  4. Are there any specific hurdles in installing a RHD engine/trans combo into a LHD vehicle?
  5. Does anyone know of shops in either the UK or France which have done or would be capable of this kind of swap?
  6. For anyone who's swapped an FTE into an 80-series, has it been worth it? have the performance/economy gains been worth it? Has there realistically been any step-down in reliability?
Any and all advice, first-experience comments, corrections to my post (I am not a trained mechanic!) on this type of swap would be very very much appreciated.

If this swap is not viable, my alternative would be simply to source a replacement 1HD-T engine (though these are increasingly hard to find in France or the UK) and get the truck running again.

It has immense sentimental value to me and my family - my granddad had taken it on several tours of Africa and it has had a long-range fuel tank installed in it along with various other bits and pieces - so above all I'm keen to getting it back in a useable condition

Much appreciated,

LD


PREAMBLE:

Long story short my granddad has a 1994 80 Series with the 1HD-T engine, registered in France. last time it was started up there was severe vibration from the engine above 1500 RPM and the oil pressure gauge was alarmingly low. Needless to say we shut the engine off ASAP.​
Due to my granddad's ongoing health problems neither he, myself or my family have had time to look into getting it back on the road. I am now in a position to do so.​
Having read a few threads etc. it sounds like it's likely to be the big end bearings which are a known failure point if not properly maintained on these engines.​
This was in fact the second 1HD-T that had been in the truck, the previous engine having grenaded itself after 350,000ish Kilometres. This leads me to believe that the mechanic who was "taking care" of the truck was not apparently aware of the need for preventative replacement of the BIBs. I've certainly seen no evidence in the service history that he had.​
I'm now looking at options for another engine replacement, on the presumption that that the one currently in it is FOOBAR.​
Realistically I don't want to get into LS/2UZ/Cummins territory due to cost, and the fact that the French DRIRE make it exceedingly difficult to re-register a vehicle which has had a non-standard engine fitted (Though I would love to hear from anyone who's managed this in France!).​
However as far as I can tell the vehicle would not require-re-registration if it was fitted with an engine from the same manufacturer, with the same fuel, and with the same capacity. (Anyone familiar with the beaurocratic nightmare that is the French authorities which regulate these issues please do correct me if I'm wrong!)​
As such this opens the door to being able to drop in a replacement 1HD-T, a 1HD-FT or a 1HD-FTE.​
Obviously, the FTE would be the ideal engine (more power, better economy, etc.) Bizarrely, these have also become more abundant in the UK versus the older and less powerful variants. I would guess that this is because of the Introduction of the ULEZ, which has rendered a lot of 100-series turbodiesels uneconomical in and around the capital, while old 1HD-T and FT engines have already been snapped up as spares etc.​
These are the particular criteria that lead me to this swap.​
 
So, I have no practical experience, but I've been casually following a few diesel swaps, so I do have some thoughts. I know at least a couple of guys have done the 1HD-FTE / A750 swap into a petrol 80, so a diesel version should certainly be doable.
Thoughts in no particular order...
  • Transmission: The A750 would be better in many ways: It's a 5 speed of course, but also it's a more efficient transmission overall. You're just wasting less energy making it work. That's got to be a win. My dream setup would be an FTE mated to one of those 8 speed ZF boxes, and people are making the adapters and controllers, but you'd be into it for another $10k-ish.
  • FTE for sure, you should buy two and send me one. 😆 My reading sort of leads me to the conclusion that the Aussie plug and play harness isn't really plug and play and may not be worth it. I got the impression that if you get the vehicle with complete engine and transmission harness, it's not as tough as one would figure to adapt to the stock harness anyway. Most of the wiring is basically self contained between engine, ECU, trans and trans controller. It only needs to talk to tie into the rest of the vehicle at a few points. As long as you know how to read wiring diagrams and have some understanding, it didn't really seem daunting. YMMV
  • Intercooler: again, I know it's been done, but not my area of expertise.
  • LHD/RHD I wouldn't think this would be a huge issue. Both the donor vehicle and the recipient are available both ways, so I wouldn't think there's be too many major hurdles.
Anyway, if you haven't seen this thread, it should be a worthwhile read:
 
So, I have no practical experience, but I've been casually following a few diesel swaps, so I do have some thoughts. I know at least a couple of guys have done the 1HD-FTE / A750 swap into a petrol 80, so a diesel version should certainly be doable.
Thoughts in no particular order...
  • Transmission: The A750 would be better in many ways: It's a 5 speed of course, but also it's a more efficient transmission overall. You're just wasting less energy making it work. That's got to be a win. My dream setup would be an FTE mated to one of those 8 speed ZF boxes, and people are making the adapters and controllers, but you'd be into it for another $10k-ish.
  • FTE for sure, you should buy two and send me one. 😆 My reading sort of leads me to the conclusion that the Aussie plug and play harness isn't really plug and play and may not be worth it. I got the impression that if you get the vehicle with complete engine and transmission harness, it's not as tough as one would figure to adapt to the stock harness anyway. Most of the wiring is basically self contained between engine, ECU, trans and trans controller. It only needs to talk to tie into the rest of the vehicle at a few points. As long as you know how to read wiring diagrams and have some understanding, it didn't really seem daunting. YMMV
  • Intercooler: again, I know it's been done, but not my area of expertise.
  • LHD/RHD I wouldn't think this would be a huge issue. Both the donor vehicle and the recipient are available both ways, so I wouldn't think there's be too many major hurdles.
Anyway, if you haven't seen this thread, it should be a worthwhile read:
Thanks dude, very helpful and much appreciated

Fwiw I'm with you tho one of the new ZF 10 zillion speeds would be lovely but god knows I would not like to try and wire it all up
 
Hello,

I have done the conversion of the 1hd-fte engine into the 1997 FZJ80 myself, here are my answers:

  1. Obviously a custom wiring loom is required as the FTE is electronically fuel-injected and the -T is not - I've read on here that a company in Australia can produce these? Does anyone know if they're still in business and if so how I can get in touch with them. If not does anyone have a wiring diagram for such a loom?
    [JS] There are couple of options in Australia as regarding the looms. Mostly used is Jonathan ( thraslux ) from the 1hd-fte conversion facebook page. I would strongly suggest that you connect to that group on Facebook as that group is solely dedicated to the conversion of 1hd-fte into 80. Wiring diagram of the 1hd-fte is available on the internets with a bit of searching. Regarding the loom, prepare to send both the 1fz and 1hd-fte looms to Australia together with the ecu as the immo needs to be disabled.
  2. How difficult is the packaging of the intercooler in the 80-Series shell? Most of the engines I'm seeing for sale in the UK are from HDJ100 models which I believe came with the intercooler so this would have to be retained for the swap.
    [JS] There are intercoolers available as third parties addons, most of us use PDI perfrormance intercooler for 80. If I did all again I would just go without the intercooler as the 1hd-fte on 79 series did not have the intercooler anyway. Keeping it simple might be way forward.
  3. Would it be best to retain the original 4-speed auto OR use the newer A750E from a 100 Series, in either case which modifications are required to get the whole assembly to fit together?
    [JS] I would strongly recommend to go with the pre-facelift hdj100 , mean a442f transmission which is stronger then the a750. Also you can re-use the shifter from the current 4-speed in fzj80. Otherwise you would have to modify the shifter mounting plate, cross-member and other stuff. In my case I had 1998 hdj100. The transmission mounting was simple without any modifications.
  4. Are there any specific hurdles in installing a RHD engine/trans combo into a LHD vehicle?
    [JS] I had engine from RHD going to LHD, no issues , just mention it and the wires would be extended.
  5. Does anyone know of shops in either the UK or France which have done or would be capable of this kind of swap?
    [JS] The conversion can be done pretty easily with couple good friends. I don't have any extensive mechanical experience and did it on parking lot.
  6. For anyone who's swapped an FTE into an 80-series, has it been worth it? have the performance/economy gains been worth it? Has there realistically been any step-down in reliability?
    [JS] It's worthy, I went almost all in and have bigger turbo ( gturbo green wheel, pdi intercooler, pdi airbox, 3'' manta exhaust etc). This can be done just without any of these addons. In fact if I would do it again, I would just keep it simple.
 
Forgot to mention that there are many other things which needs to be taken care, the fact that you have 1hd-t makes it easier:
* 1hd-t airbox can be used with fte without any modifications
* oil pan needs to be swapped from 1hd-t to fte
* the right hand side engine mount needs to be reused
* you need to source bigger feed line then 1hd-t 10mm , 1hd-fte uses 12mm. Some guys just leave it and use pickup pump
* in my case i had transfer case without viscous coupler so had to extend the rear drive shaft ( kardan )
* the aircon compressor needs to be taken care off ( still missing in my case ), the upper housing needs to be changed from 1hd-t to 1hd-fte compressor
* speedo meter needs to be modified and one transistor needs to be re-soldered
 
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I have been hearing the Aussies don’t push more than 250hp through the 750 when the trans is stock. They say it doesn’t last with more power than that.

Cheers
 
I'm aware this broad category of swap has been performed successfully by others. My main questions are as follows.

  1. Obviously a custom wiring loom is required as the FTE is electronically fuel-injected and the -T is not - I've read on here that a company in Australia can produce these? Does anyone know if they're still in business and if so how I can get in touch with them. If not does anyone have a wiring diagram for such a loom?
Try searching in the diesel tech forum section as well.
2. How difficult is the packaging of the intercooler in the 80-Series shell? Most of the engines I'm seeing for sale in the UK are from HDJ100 models which I believe came with the intercooler so this would have to be retained for the swap.
this is a well trodden path. If you buy a well made kit with instructions, it will be easier. Or, piece together your own kit.
several quality options from Australian suppliers.
3.Would it be best to retain the original 4-speed auto OR use the newer A750E from a 100 Series, in either case which modifications are required to get the whole assembly to fit together?
Best option, install a H151F 5 speed manual.
beyond that, use the transmission that cane with the 1hd-fte. Simpler install
4.Are there any specific hurdles in installing a RHD engine/trans combo into a LHD vehicle?
it will basically be a bolt in install, then a wiring harness splice job. Engine is physically the same for all the critical dimensions.
that's not to say there won't be puzzles to figure out.
5. Does anyone know of shops in either the UK or France which have done or would be capable of this kind of swap?
Nope
6.For anyone who's swapped an FTE into an 80-series, has it been worth it? have the performance/economy gains been worth it? Has there realistically been any step-down in reliability?
Is it worth it? In terms of driving experience, power, torque, smiles etc, it will be a big step up. The performance upgrade potential is greater too.
In terms of economy and dollars and cents ( or pounds and shillings), unless you do 10s of 1000s of miles yearly, you'll never pay for it in any fuel savings etc.
For long hourneys, you may slightly improve your range between refueling, but it won't be significant.

In terms of reliability, the 1hd-fte is every bit as reliable as a 1HD-T . They have decades of proven reliability in the harshest conditions you care to take it into. Keep up the maintenance, and you're good to go.
 
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Depending in when the original vehicle was built, later 1hd-t equipped 80s had 12mm fuel supply lines from the factory
I had impression that only 1hd-ft had 12mm line.
 

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