the problem with these types of tests is it is done under a controlled situation, when you are feathering the throttle or the brake, emissions go out the window, so no real difference in my opinion. It's just a case of i said so, so you do as i say.

to strengthen the internals of the box is a good thing Richard , but that is not the failed component . the pump and converter are the items that failed and this is where the strengthening needs to be and i thought he was doing this but he is only doing the clutch pack as that was recommended i think . so this will be a strait swap and no mapping required . keeping it simple.
PS if this was me i would be considering the mod , costs etc, read the comments on the Ashcroft site about the mods that you can do to the box. the strongest box to fit to a diesel is a hp24 box with a hp22 torque convertor as the bell housing is too small to fit the bigger hp24 convertor .people that have done this say that it should have been done by the factory as it make them better vehicle all round .

the gear box you have has a small torque convertor in it as well as a small pump, ( the piece that the torque converter fits into) this is the part that failed in your box . this item can be replaced with the torque converter and pump from a hp22 box ,( the hp24 converter is physically to big and will not fit the small bell housing in the diesel gear box so you can only use the hp22 pump and converter . to do this you have to drill an access hole in the bell housing to be able to do up the bolts on the flex plate. (this is all explained on the Ashcroft site ) . as for the parts being available, they are only hp22 parts and are readily available. as i stated in my first comment you can fit a hp22 box and converter with the original diesel bell housing . all that is required is a different boss and bolts that bolt onto the engine crank and a 4 bolt flex plate that Ashcroft supply . when you stated that you was going to get a bigger clutch pack from the 24 box i assumed you was doing the mod with the bigger torque converter as well as this give you the strongest box you can fit to the diesel which is a hp24 box with a hp22 oil pump and converter as the parts are interchangeable from one box to the other . the bigger torque converter is a highly recommended modification for those that replace the box for the reason you are doing it .
PS ring Ashcroft and ask the questions as they can do it for you ,and maybe explain it in more detail .
PS if you do this you have to remap the engine or it doesn't work properly. if you put the small one back in then you don't need to remap
at the end of the day it will give you a better drivable vehicle IMHO.
this mod is a common mod for the disco diesel gearbox and i assume that box is the same as your box .
well that's my 2 cents worth , i hope i have helped in some way .

ok so you will not need to remap then , but my next question is why are you not doing the upgrade , it's highly recommended as it makes a big difference to it running of the vehicle.

if i was you i would be ringing and checking that it is a standard 3 bolt convertor and not the 22 . IMHO you are better to go for the other if that is the case .

sorry i have been away . the torque convertor from the 22 will fit in the diesel bell housing, the 24 is to big and will physically not fit . you have to modify the diesel housing by drilling a hole in it to access the bolts on the flex plate which also has to be replaced as the diesel one only has 3 bolts.
there is no advantage to just put bigger clutch pack in the diesel trans as the small oil pump and torque converter is what fails in these boxes.

it's not a turbo diesel either Richard, the mapping does not suit the bigger convertor, it changes gears at the wrong time and has lots of lag will drive like dog, slow and sludgy. if you read the reviews it states that it requires remapping.

don't forget you have to get it remapped or it will be slow to drive the bigger torque converter.

you only need to put an empty box trailer on them and the fuel use goes out the window , also the ECU hasn't set its self-up for towing but now it will tow better but your already their now, they also are not the most powerful thing to tow with.

if the bushing is soft the vehicle will feel like it's slightly drifting around corners and changing directions like you have to position yourself twice for the corner.

if i was to redo my wood i would be using a polyurethane clear coat lacquer , available in gloss and matt finish .use the pressure pack and spray it on for a smooth finish .
linseed oil will give no protection for the elements and shellac would be a bit soft in the heat , go sticky . that's my 2 cents worth.

you can put the hp22 in with some modifications, it's a recommended upgrade. you can not put the hp24 in as the torque converter is to big and will not fit in the bell housing . you will need the old bell housing to fit to the hp22 and drill a hole in the housing to do up the bolts on the flex plate , you also need a different flex plate, boss and bolts (ashcrofts is where you get this stuff) as the original only has 3 bolts and the hp22 has 4
PS you also have to get the vehicle remapped to suit the bigger torque converter or it will be sluggish as the turbo doesn't work properly . hope that helps .
PSS you can fit the internals from the hp24 into the hp22 but you still need the hp22 converter and oil pump.

as long as you don't burn another relay then you need to look at the fan
PS remove the relays and look at the fuse board as well

check the relays on the fuse board , just replace them and inspect the board for burning and cracking. if this is all good then it could be the fan that is sus or both.

if that's the case then put the hose onto the cover and you will hear it. some times they are a bit hard to pin point , you need to push the hose right onto the manifold , yes it may melt a little but you will find it.

if you want to find the leak just use a piece of garden hose . one end up to your ear and just prod about with the other , tape a piece of wire to it so you can reach in behind the manifold.

dex 111 is about 30 grade oil not 75 80 multi grade i have heard people have trouble with dex 4 so don't use that either in a zf 22 / 24 box , as for the 6 speed i have had no experience on them so my advice is to read the service manual .
PS be very careful with transmission oils,as oils ain't oils, sole. you will do damage , and to remove the oil is very difficult when they are mixed up

if i was desperate i would weld it up in a heart beat or re sleave it. which ever is easiest. the exhaust is not sold mounted so room for expansion. let us know how you go.

nice 😀

don't forget the back has a big piece of plastic covering the spare tyre . this is the limit to how much you are game enough to put on it . i did put 10 bags of premix cement on it at 20kg a bag with the thought i have a spare one in case it lets go