Quote:
Originally Posted by danonly55
I am trying to get more top speed with less rpm in my 1980 300sd, I was thinking of maybe a 450sel same era rear end swap. Will this do what I need or what do I need to do ?
Thanks , Daniel
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Doubt you will get a higher top speed.
450SEL had a 3.07 or 3.06 axle except for the 1980 model year.
Also I would trust mb engineers who designed this car and leave the axle stock. They knew that a taller axle would get them better fuel economy and less noise and yet they decided to stick with a 3.07 ratio