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Old 06-17-2008, 02:09 PM
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300D/240D clutch parts interchangeable?

For purposes of doing a clutch job on a Euro-spec 300D: does anyone know if the 617.912 uses the same clutch disc, pilot and throwout bearings as the 616? I suspect the 300D clutch components are going to be hard to come by. I know the 616 and 617 flywheels are of different size and weight but if the diameter is the same, I thought this might work. Thanks.

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1981 300GD unknown km
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Old 06-17-2008, 02:11 PM
ForcedInduction
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Yes, clutch parts and dimensions are the same. The only difference is flywheel weight.

The 300GD uses heavier-duty parts though.
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Old 06-17-2008, 04:17 PM
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Thanks Lance. This is for my sedan though. I just swapped in a 100K drivetrain (less the rear end) from my parts car and I now have an intermittent growl that sounds like a tranny noise. It could be the throwout bearing and I hope that's all it is. Otherwise it could be the dreaded Getrag input shaft bearing that sometimes plagues us G people...? I don't know if the bearings are the same.
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Old 06-17-2008, 04:33 PM
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Quote:
Originally Posted by 300GD View Post
Thanks Lance. This is for my sedan though. I just swapped in a 100K drivetrain (less the rear end) from my parts car and I now have an intermittent growl that sounds like a tranny noise. It could be the throwout bearing and I hope that's all it is. Otherwise it could be the dreaded Getrag input shaft bearing that sometimes plagues us G people...? I don't know if the bearings are the same.
There are two types of bearings. I just replaced mine, one is recessed a bit more than the other.
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Old 06-17-2008, 05:50 PM
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Ah! Good to know; thanks for that. The problems with the input bearing design on the 717.42 Getrag as used in the W460 chassis G-wagen are described here. In case the link doesn't work, below is an excerpt. Does this sound like the bearing you replaced or was yours the other one? Thanks.

"I finally removed the transmission to attempt an upgrade of the front input bearing. The truck was making an urrr gear noise at takeoff and low speed that I was pretty sure of front input bearing origin. Sure enough there was a lot of play in the front input shaft. Around 30 thousandths at the clutch splines, side to side. Not good. I took the transmission apart and found that the front bearing is a radial ball bearing with a two piece inner race. It has a special design because there is about 1mm of backspace on the rear inner race with a keyway for a pin that seats against the front gear. I think that a possible cause for early failure in my gearbox was that the pin was bottomed against the race not allowing the race to seat hard against the gear. The circlip was very difficult to get out of its groove on one side. I bent it up but got it out and didn't really think about the issue until I was measuring things later.
Another reason for possible early failure of these bearings is due to the way they are held on that shaft. There is no nut applying force there just a heavy duty circlip holding the two inner races against the gear. A dubious setup in my view given that the torque of the motor is wanting to press those races apart most of the time."

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