108 differential gear - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 02-22-2011, 07:14 PM Thread Starter
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Date registered: Dec 2010
Vehicle: 1967 (Originally titled as a 1968) MB 250SE
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108 differential gear

I have a 67 250Se w/4spd. manual. According to another website the gear ratio is stamped into a pad on the drivers side of the rearend center section housing. Mine reads 4.56. I have another diff. assembly from another (unknown)108 and it reads 3.08. I am planning on swapping over all of the external parts that are on the car onto the other rear and swapping it in. My Mercedes (factory) service manual indicates thie only ratio available in this car is a 3.70. Any comments/suggestions/info on this swap?
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post #2 of 5 (permalink) Old 02-22-2011, 09:41 PM
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A 3.08 will turn that 250se into a lazy dog from a stop, but will lower the rpms at 80mph, how often will you be blasting along the freeway? If you use it around town, general usage try the 3.9- ratio. I had a w108 250SE 4sp euro once, it loved the rpms if tuned and valves adjusted, tight cam chain.

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post #3 of 5 (permalink) Old 02-23-2011, 04:53 AM
GGR
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I've never heared of 3.08 or 4.56 rear enf ratios for these cars. I know of the 4.08/4.10, 3.92, 3.69, 3.46, 3.27/3.23 and 2.85/2.82.
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post #4 of 5 (permalink) Old 02-24-2011, 05:30 PM Thread Starter
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After further review....my age is showing...I re-examined and cleaned the pad on the side of the housing in the car and it reads 4,08...I guess I was fooled into misreading it as 4,56;I have no excuse about the other rear but I think it says 3,27, but it is very difficult to read and I'm not sure.
I'm going to stick to my plan and try out the 3,27 because first in the manual box is waaaay low and second is pretty close. I appreciate the input given that it might turn into a dog, but driving it around here the way it is means some Jersey (S)hore transplant will likely run into the back of me. I've had several near misses.
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post #5 of 5 (permalink) Old 07-26-2012, 05:39 PM Thread Starter
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Vintage tool for vintage mechanic

Anyone know where I might find the correct wrench to remove the special nut that retains the outer axle bearing on a W108 awing axle?

I'm also trying to buy a driver's side brake backing plate. It's rusted through quite badly.
I need to remove the nut (above) to get the bearing off to get the brake backing plate off.

It was all going so well, too. oh well. Just a bump in the road I guess.

Thanks in advance for any help you can provide.
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