From: £3,193.00
The full price of your kit will be displayed after all options have been selected.
Please note the lead time on this product can be up to 2 months, an estimated date of dispatch will be provided on receipt of your order.
We are able to offer an house fitting for this kit, please contact Conversions@ashtrans.com for more information.
Kit to Convert the Td5 Defender to Automatic Transmission:
We are able to offer an electronic conversion kit for the Td5 Defender using the the Compushift to control it.
The compushift has the ability to make the autobox shift exactly as you want it, lock up when you want it, switch shift etc, when set up correctly it drives perfectly, just like a factory vehicle.
The conversion uses the stock Disco 2 TD5 autobox so if you are on a budget, you can get the autobox, converter, starter ring, cooler Etc from a breaker and just buy the Compushift and console from us to complete the job.
Please note that the shifter in the above photo is the upgraded Disco II shifter. The standard kit comes with this shifter.
Please have a read of the Technical Information section below on the heavy duty upgrades.
The kit is comprised of the following products:-
Autobox, 4HP22, rebuilt, outright with torque converter
Compushift
Potentiometer switch, Please click here to view this product
Crank assy, to include starter ring, flexplate, buttress ring, boss
Oil cooler & 2 x pipes (You will choose type 1 or type 2 dependant on your requirements, Prices displayed in the dropdown)
Please note if you have a full height intercooler you will need to select Type 2 Oil Cooler, use the deep air con air grill, move the air con fan to the side and mount cooler on the other side.
Shifter, to include, shifter & cable. Please see here to view this product.
Swan Neck, Hi-Lo mounting bracket, FRC8558. Please click here for product details
NAS Centre Console. Please click here to view this product
Rubber trim and foam pad. Please click here to view this product
Hi Lo Gaitor. Please click here to view this product
Clutch Pedal Box Blanking plate. Please click here to view this product
Console Support bracket. Please click here to view this product. This product is only required for the 110/
Footrest bracket and rubber pad. Please click here to view this product
Fat brake pedal and rubber pad. Please click here to view this product
We can also build your unit with our ZF Hi Cap Sump. If you would like this please select in the drop down menu.
The Defender Auto Plaque is not included the kit but is a nice addition. If you would like this please select from the dropdown menu.
Technical Information –
Heavy Duty ZF Autoboxes
We are able to supply the ZF4HP22 with optional strength upgrades depending what you are doing with the vehicle, what gearing, what engine Etc.
Stage 1 upgrade
We can build the 4HP22 but fit the centre section of the box with the bigger 4HP24 internals which upgrades one of the weak links being the C1/
another part which gets upgrade is the Planetry Gearset, the solid 24 type being much stronger,
Just the centre internals are changed so the box stays the same externally. This upgrade is an additional £ 250.
Stage 2 upgrade
The box can be built with both the 4HP24 internals as above but also the 24 front end as well giving you the added strength of having the larger 24 “A” clutch, also a weak point with the larger engines,
The fitting implications of doing this is the unit is 15mm longer. This upgrade is an additional £ 500.
Torque Converter Upgrades
If you would like to upgrade your torque converter, please see more information here. Please note we would only recommend this option if you have a tuned engine.
Oil Temp Info
Click here for a guide on oil temps
The price shown is for the kit only however we are able to offer a fitting service for an additional £1,200 plus vat and this price assumes we keep the manual gearbox. We would require the vehicle is with us for 7-10 working days. Please contact us directly to arrange a fitting appointment.
In order to calculate your shipping costs you will need to put the items in your shopping basket and confirm your delivery address. Once you have entered these details a shipping quote will be generated. Please do not proceed to the payment stage unless you are ready to order.
Heavy Duty ZF autoboxes
We are able to supply the ZF4HP22 with optional strength upgrades depending what you are doing with the vehicle, what gearing, what engine Etc.
Stage 1 upgrade
We can build the 4HP22 but fit the centre section of the box with the bigger 4HP24 internals which upgrades one of the weak links being the C1/
another part which gets upgrade is the Planetry Gearset, the solid 24 type being much stronger,
Just the centre internals are changed so the box stays the same externally. This upgrade is an additional £ 250.
Stage 2 upgrade
The box can be built with both the 4HP24 internals as above but also the 24 front end as well giving you the added strength of having the larger 24 “A” clutch, also a weak point with the larger engines,
The fitting implications of doing this is the unit is 15mm longer. This upgrade is an additional £ 500.
Torque Converter Upgrades
The ZF auto as used in the Land Rover vehicles uses three different diameters of torque converter. Small. Medium and Large.
“Small” is used on the 300 Tdi, P38 diesel and the TD5.
“Medium” is used on the 3.9, 4.0 and the later 4.6 P38.
“Large” is used on the early 4.6 P38″s
Note the large converter can only be used with the stage 2 as it will only fit the 4HP24 front end.
A larger converter is desirable on a tuned engine for a few reasons :
1) Lower stall speed, there’s little point in having a nice torquey engine if the converter is not transferring the drive and you are revving straight past it. A larger converter will reduce these revs and allow you to take up drive earlier which results in much more relaxed driving. This is by far the biggest advantage of upgrading the converter. Note these reduced revs are not to be confused with lower gear shift points, these stay the same as they are determined by the autobox ECU programming.
2) Less heat generation because of the lower stall speed and reduced ‘slip’.
3) The converter has a lock up clutch inside and the smaller one struggles to cope with a stock engine, never mind a tuned one. This clutch can slip as you accelerate when it should be staying locked.
TD5’s – The stock converter is the small one. If you have a stock engine, stick with the stock converter. If the engine has a mild tune then we would recommend upgrading to the medium diameter one, we have sold quite a lot and get very good feedback.
V8’s – We would recommend the stage 2 and the large converter with a 4.6 or more. To fit the large converter you will need the 4.6 boss and flexplate assy to match the bigger converter.
2.8 TGV – We would recommend the stage 2 and the large converter with the 2.8 TGV, When using this setup be sure to order the correct conversion kit to suit the large converter. The part number for this kit from Motor and Diesel Engineering in the UK is Kit ’82E’. See below for additional notes on the 2.8.
TD5 ZF upgrades
If you are converting your TD5 Defender to auto you have a few options, I though it may be useful to give some guidance based on our experience.
Stock 90/
Oil Temp Info
click here for a guide on oil temps
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Sandy –
Auto defender
Following a back injury i looked into convering my work defender to auto. Best move i ever made! I tow 3.5 tons regularly and properly set up it makes the ultimate towing vehicle with no overheating. I know own two auto defenders, both ashcroft boxes. Defender heaven!!
shaun stoddart –
Td5 Auto heaven
Had my 2001 td5 110 converted, to auto as I was finding the heavy clutch was giving me problems. Old injury to my left foot.
With electronic shift sublime easy driving everyday comfort.
Why this was not aneed everyday option I’ll never know. Just brilliant.
Bill Duke –
Auto Box
Wow what a revelation. Only had the vehicle back for under a week but initial signs are all good. Having suffered an injured knee in an accident I was finding the heavy clutch a bit onerous. You could debate about the cost but if your committed to Defender ownership then this is for you if you need an auto! Should have been a factory option! The turn around was quick and the staff were very friendly and helpful, Dave personally involved as well. Overall pay the man and enjoy the auto.