Transmission questions

[Oli18]

Hi Mugzee,

Sorry to hear about your woes. Just to confirm that the gearbox oil was not changed during my ownership (really due to consensus around just leaving it given the issues some have seen after a change) and that York Audi would have been the last place it was done before my ownership.

Hope you get it sorted.

Oli

[Mugzee]

Thank you Oli, that's good to know. It's annoying as even though that was the last time the transmission was touched, I have no real way of proving that. They also only carried out a drain and fill and didn't renew the filter, even though they were requested to do so.

I spoke with Tim from ZF and he said that it's probably bad news. Mineral based fluids are usually red and when introduced into the gearbox can and will damage clutch plates and seals, even the possibility of de-laminating clutches. Mineral and synthetic oils don't mix well and he said that is probably what's causing the issue. Without getting the old fluid analysed, it's obviously difficult to tell exactly what it was.

On another test drive to try and determine when the fault arises, it went into limp mode with 17114 - gear ratio monitoring fault code.

I may try another fluid change to see if that helps.

[The_Laird]

This is a real shame to start your '8 ownership with problems. If you want to talk to another ZF expert, this is the guy Brian and I have used:

J Connachan
Service Manager
Mackie Transmissions
Tel: 0141 778 4545
email: jconnachan@mackie-transmission.com
Web: www.mackie-transmission.com

[Mugzee]

Thank you. I called them today. I was told I was going to get a call back but I didn't so they must have been busy.

Tim from ZF called me back with some more info today. He told me to carry out a stall test to determine whether the clutch packs are at fault. He also said that a bulletin had been issued regarding faulty coolant temperature sensors which can indirectly cause transmission issues and problems with shifting even if no fault codes are present.

I have also found out that Audi and ZF lifeguard 5 fluids are Mobil ATF LT 71141 rebottled.

[David's8]

Originally Posted by Mugzee

......I have also found out that Audi and ZF lifeguard 5 fluids are Mobil ATF LT 71141 rebottled.

That makes total sense as Audi and ZF are not major oil companies and wont be producing their own oil. What is intriguing is that the designation "LT 71141" is identified with an Esso product in the linked Mustangbuffs article earlier in this thread along with a statement that Mobil didnt produce a compatible ATF! What is true is that Opie and others stock Mobil ATF LT 71141 at £10.49/ltr from their site or £8.38 thru' their ebay site. (delivery extra)