Thread: W123 + 3.06 diff swap from r107
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Old 01-14-2019, 05:32 PM
SD Blue SD Blue is offline
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Join Date: Jun 2004
Location: West of Ft. Worth. TX
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Your "definitive" answer will be to measure the width of the differential. As previously mentioned, one is 185mm and the other is 210mm. I swapped the entire axle/differential combo to eliminate sourcing spacers. You will likely need to replace the pinion yoke. Here is a good video from YouTube "university" that explains how:
Diff rebuild - how to set pinion bearing preload Ep.1 #1023
Andy the Mechanic
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84 300SD 350K+ miles ( Blue Belle )
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