Auto transmission fluid change on GU Patrol question.

[micknor51]

Hi fellas,
I am in the process of changing fluids on my 2008 GU Auto Patrol with 101,000 km on the clock.
The manual says that the auto contains 11.8 L of ATF. On draining the transmission at the sump only 4.2 L came out, so I guess the rest is in the oil cooler and pipes How do I go about draining the extra oil in these areas? I am refilling with Penrite Full Synthetic ATF FS.
Thanks
Michael

[jff45]

You can't drain it, you need to flush it. The process wastes a bit of oil but you get the whole system flushed including cooler and lines. Highly recommended if your changing to synthetic.
Your local trans shop could do it.

[kevin07]

absolutely get it all flushed out if your going synthetic I put penrite semi mhp, I took the pan off changed the filter and used compressor up the cooler pipe and got 8 litres out. (measured it) put 8 back in and from there change the oil out of the pan every 10 thousand. and your oil will always be fresh.