Fuchs oil used in transmission service!

**hpal** · 15th March 2018, 06:59 PM

Booked in my 2007 D3 today for a trans service at 200,000km with my local independent who is pretty good. Its been done before with steel pan fitted. Great service and I'm happy to have it go to them, only problem was the fluid they used in my 6speed ZF box, or the lack of communication around it. I was 100% sure they'd use the zf fluid because nowhere on their website mentions fuchs fluid and they sell a service kit containing proper zf fluid with no other fluid option. I was disappointed to find that they used fuchs when I didn't know I had the option! If I knew I would have just done it myself and saved $300

I queried it obviously as I was a little deflated, but they said it meets all specs and they use it all the time with no issue, mechanic uses it in his disco as well. This made me feel ok but I still have some paranoia surrounding a $7000 rebuilt if something goes wrong! They offered to dump it and refill with ZF and I'll pay the difference, but I dont know. It's probably nothing. What do you guys think? Oil is Fuchs ATF fully synthetic 4134.

**Geedublya** · 15th March 2018, 07:37 PM

Get the LF6 put in. I was speaking to my transmission shop who does a lot of these boxes. The local taxi company wanted him to try different oils, the ran 2 non ZF oils in two taxis and changed it out at regular intervals. They both needed rebuilds by 180K the thrust washers wear. Taxis running LF6 go for 800K plus with regular changes.

**scarry** · 15th March 2018, 07:41 PM

Mine was done this week as well,they said we can put something in,or LF6.

Going on advice from people on here,LF6 it was.

**justinc** · 15th March 2018, 08:07 PM

I CANNOT believe this is still happening!! Trying to 'save' money on oil is just wrong.... WRONG!!!!

**hpal** · 15th March 2018, 08:23 PM

Lf6 is what I thought I was getting!! ****ed off. 😡 should I get them to dump it and refill? Then how can I be sure the good stuff goes in? Or get the bottles myself and put it in either now or run it for a year to cut my costs a bit?

**shanegtr** · 15th March 2018, 08:29 PM

End of the day ZF has not yet approved any other oil other than LG6 for the 6HP26. For many of their older transmissions they do have a list of approved aftermarket oils so if there was something suitable out there Im sure that they would list it. With that in mind I would personal only use ZF fluid until the day they approve another oil

**loanrangie** · 15th March 2018, 09:03 PM

Unfortunately you will now need a full flush to get the fuchs out.

**hpal** · 16th March 2018, 06:24 AM

I wish they'd never put it the fuch in there! I guess they'd be pretty compatible though, ie it's not like one's milk and the other's orange juice. They're most likely a similar oil just with different additive packs. I might get the oil from the and do it myself

**67hardtop** · 16th March 2018, 08:05 AM

The additives are the key. Dont risk it. Dump it, flush it, put the correct oil in. Save money in the end opposed to a rebuild

**101RRS** · 16th March 2018, 11:07 AM

Originally Posted by hpal

I wish they'd never put it the fuch in there! I guess they'd be pretty compatible though, ie it's not like one's milk and the other's orange juice. They're most likely a similar oil just with different additive packs. I might get the oil from the and do it myself

How are you going to completely flush out the old oil at home?

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