Forgotten fluids: 560SL differential fluid

[DavidSoine]

Well I finally got around to changing the diff fluid on our 560 last night. I was astounded at the putrid sludge that drained out of it! I flushed a little gear oil through and then filled with new Mobil 1. The job is pretty easy but you have to get the car up in the air enough to get underneath, AND it must be level to allow the diff to be filled properly.

A 14mm allen driver is required for the job. No parts required, just gear oil (1.3 l).

My research says most if not all 560SLs have a limited slip diff - requiring "special fluid". Regular gear oil (I use synthetic, of course) can be used if a "friction modifier" is added...or just buy some gear oil that already has the stuff added. I didn't use any friction modifier yet...so far there is no chatter with the Mobil 1. If I notice anything I will just add it later.

This job is so easy there is no excuse to put it off - so don't!

best,

Dave
87 560SL