Use Getrag Toyota V160 FLUID Only!
Hi,
Getrag has stated that using Redline fluid or anything other than Getrag-Toyota V160 fluid will cause seals within the trans to shrink or expand at different rates. I know this for a fact; I used Redline D4 ATF and my tranny started to leak from the shift shaft seal. Within a week of replacing the fluid with the V160 fluid, the leak completely stopped....I was lucky.
The fluid is available from Toyota. It is called V160. The parts guys always give you the wrong fluid, because they have never seen it before... but it is in the Toyota part guide and stocked in Toyota's wherehouse. It is about $45-49/litre. You must buy two litres, because the MKIV takes 1.8 litres. Even though this is expensive, it is cheaper than a $5,000 trans. Toyota lists the trans as containing non-replaceable parts. So if you ruin it, i'ts $5,000 for a new one!