Printable View
Neither does A&B Transmissions in Dandenong South VIC who are ZF agents and offer a full service for $774 (as of a couple of years ago, so might be a bit more now). They check that the software is up to date, but don't reset unless absolutely necessary.Quote:
Originally Posted by justinc
Hi all,
Have been using my wet saturday researching transmission flushes - have read Robbie's Guide To ZF8 Auto Transmission Oil Change and all 14 pages in the Disco3UK forum topic - fascinating - however I don't have the facilities to do it myself.
There are machines that perform a fully automatic flush and refill which are no doubt used by many workshops - such as pic below.
Attachment 184994
When I read Robbies Guide, I see a multi stage operation with precise instructions -
Qte ...
First fill the gearbox until fluid starts to drip from the fill port before retuning to the driver's seat. The ZF8 needs to draw fluid to all the key components for the oil level check to be valid. Failure to follow the correct steps may damage your gearbox. The gears, clutches, torque converter and oil cooler system must all be allowed to fill
12. The ZF8 gearbox uses a small chain-driven vane cell pump, mounted to the rear of the TC to circulate the oil. It is a very efficient unit and places very little load on the gearbox; it too must be allowed sufficient opportunity to prime correctly
- Start the engine (to draw oil from the sump and pump it around the gearbox).
- With the engine still running slowly add more oil through the fill port until it starts to drip again.
Return to the driver's seat and with a firm foot on the brake and checking the EPB is still applied:
- Select Reverse for 5 seconds.
- Select Drive for 5 seconds.
- With the flappy paddle select 2nd Gear for 5 seconds.
- Select Neutral.
To fully fill the torque converter the vane cell pump must run at a higher rpm:
- Throttle to 2,000 rpm for at least 30 seconds.
- Select Park.
- Allow engine to idle normally
13. All the components of the gearbox will now be fully primed with transmission fluid, with the exception of the oil heat-exchanger system. This system is thermostatically controlled. For the oil to prime and circulate correctly the thermostat must be fully open. Using either a thermometer on the sump or a suitable diagnostic tool, monitor the gearbox oil temp until it exceeds 69 deg C. This can take a while, so you can get a brew. Temp shown on IID, bottom right value indicating 68 deg C
14. Having hit the magic temp I consider it good practice to repeat the gearbox selections above, but it is not called for in the workshop manual.
- Replace the fill port finger tight for now.
- Turn off engine.
15. Having primed all parts of the system correctly the final level check requires the gearbox to cool-down to below 30 deg C. Even on a cold afternoon I managed to eat my evening meal, do some other jobs and drink my first beer before it was cool enough for the level check. Having achieved below 30 deg C:
- Start engine again.
- Remove fill port plug.
- Slowly fill with ATF until a fine thread of fluid leaks from the port.
- Replace plug and torque to 35 Nm.
- Wipe area clean and inspect for leaks.
- Double check that the temperature has not exceeded 50 deg C during the filling (if it has then allow to cool and repeat the fill check).
- Turn off engine.
- Replace undershield and 5 x 10mm bolts.
- Remove catchpan, tools and the safety stands.
- Clean any spills.
.... Unqte
So my question is this - when using this Auto Machine, are the steps above necessary, and are they the standard practice for LR Indy's and specialist transmission centres who use them?
Many thanks in advance!
