So, l went ahead and changed the ATF auto transmission oil cooler today.
The task itself is not particularly difficult. Just ruddy awkward. If doing again l could half the time. Allow 2-4 hours
The van needs safely raising by about 30cms to allow work space underneath.
Support the transmission with a large block of wood on top of a trolley jack and remove the nose bush 13mm bolts. Now undo the 17mm bolts on the end support bracket. Watch for a spacer washer under one bolt. . It's suggested to release the accelerator lever on the side. I did.
Now carefully drop the transmission by about 50mm. Grab a container, clamp off and remove the two coolant pipes. You will get wet! Grab another tray. Then undo the two 17mm ATF cooler retaining bolts. You will get ATF down your sleeve. Remove cooler.
Note spacer on left side behind bracket
At this point the combination of coolant and ATF over your driveway will make you realise paying 2-3 hours' labour is actually a sound idea.
Nice and clean
Remove old seals from bolts. Then give the bolts a scrupulous clean up. Dip two new seals in clean ATF fluid and slide into the recess under the head of each bolt.
Replacement seals
Auto transmission coolant chamber. Bottom one out. Note seal position.
Top one ready for new seals.
Next, remove the other two seals from the cooler box and clean it up. I had a spare cooler box ready for new seals. Again, dip new seals in ATF before placing the seals on the cooler
Give the transmission area a good clean up.
At this point l gave up photographing. The combo of coolant and ATF got a bit messy.
Add coolant pipes first. Then bolt on cooler to transmission. Be certain seals are in correct place before applying torque settings.
Raise transmission and reverse procedure for rebuild. Use torque values throughout
Its unlikely you will need to top up with ATF. But get engine nice and hot before checking ATF level stick. The red ATF lubricant must be clean and red. Top up as necessary. Do not overfill.
Regards
Stuart