Kuni BMW parts guy tells me that the diff speed sensor is only for the speedo cable to the instrument cluster.
Is that right??
He said there are two speed sensors in the transmission - identical parts - called a 'pulse generator'. Maybe they measure input speed and output speed??
From his drawing, he couldn't tell if you could change these two parts without cracking open the valve body.
Does this ring true with you guys??
I don't have the equipment or skills to crack open the trans at my house, so I'd have to pay my trans specialist guy to do it for me. When I had the fluid and filter changed, it was about $350 - yikes! I suspect I'd have to pay that all over again too.