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Originally Posted by jfikentscher
Can a 1987 300DT take a diff from a 300D or 300E? What problems would be presented if the switch is made?
Thanks,
Joe
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The diffs will marry up no problem. The same unit will fit a 201 as well as a 124 chassis with a cover swap.
A diff with a LOWER # (TALLER GEARING) will raise your acceleration (zero to sixty will be quicker) but the engine rpm will be greater as you go down the road, using more fuel and wearing the engine a little more than if it were the original version.
90-92 300E: RATIO 1:2.87
93-95 300E 2.65
93-95 499E 2.24
neil ke6dcj says the 2.87 is a good compromise between highway cruising and performance in his modified gasser 124 wagon (300TE) with a V8. Expect to pay at least $125 for a used one.
As for the speedometer, a speedo shop can change the readout using the original K factor, shown on the old instrument and recalibrate another instrument to the same factor. All it takes is $