Quote:
Originally Posted by blotto649
Well, here we are, and the fluid drama continues. I hate to open this can yet again, but I'm just trying to confirm what got put in my diff the other day, so here goes...
Part number on the invoice is 83-22-9-415-961
- my SA says it SAF-XJ w/o friction modifier
- parts desk says it's a 55L drum of something, but can't tell me which fluid and can't give me the 1L equivalent (called a couple dealers)
- online searches for the part number reveal very little, but I found some posts which say this is the 100ml(!) equivalent of 83-22-1-470-080 which has been superseded (apparently) by 83-22-1-407-870.
And to add final insult to the confusion, I found info that said the above 470-080/407-870 could be SAF-XJ or could also be MSP/A which is the "new" fluid used in the latest M3/M4/M5.
I probably shouldn't be worried, but because I can't find any record of what this part number relates to, I just want to be sure I didn't end up with tranny fluid in my diff.
FUN!
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Like I posted eons ago... every dealer uses a GENERIC part number for the oil they bill out to customers. That's because they buy the oil in bulk... and they need to figure out a way to bill each customer.
I would ask your dealership again what type of oil is in that barrel. SAF-XJ is just fine for the rear diff. Most dealers are using the +FM oil so that customers don't complain about diff noises due to the lsd clutches locking up. As long as your diff never had +FM... you will be ok. IF your car had +FM at one point... you will need to keep using +FM fluid.