Update is there is no update. Work intruded last week and this weekend, and I’m waiting on parts. My output bearings came in though and once installed this week I can assemble the diff and check the backlash and gear mesh. I also ordered some misc driveshaft parts like a new center bearing and a new CV joint. It will be easier to get off since the diff will be removed and at 160k, a refresh is likely due.

Meanwhile, before leaving for work last week I spotted a decent size cooling puddle under the aft part of the stiffener. Looks like it’s coming from the bellhousing unfortunately. Fingers crossed it’s a heater or rear manifold hose connection loose and not the valley.

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee