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  #31  
Old 03-25-2008, 05:48 PM
winmutt's Avatar
85 300D 4spd+tow+h4
 
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The benz u joint is only supposed to bend under acceleration, hence the lower RPM issues. After I dropped my trans 1/8" or so my problems went away. I could actually see the flex discs flexed when the car was on the jacks.
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  #32  
Old 03-25-2008, 06:06 PM
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Quote:
Originally Posted by MTUpower View Post
You need this
this may help vibes a little, but I had the exact part on the back of my jeep t-case/manual and all it was for was to keep the gears from chattering when you shift. it is more of a flywheel than a dampener to keep the gear engaged and doesnt allow the shaft to move with each tooth pass, at least on the jeep. auto jeeps do not have it. when i changed my t-case on the jeep I removed it and I did have a lot more chatter and noise than before between gears. sounds like something MB would do. if it was meant to be a balance damper wouldnt it have a rubber ring in between the outside steel ring to absorb vibes?

edit... i see now maybe the triangular portion is rubber? if so maybe it does both.
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Last edited by lutzTD; 03-26-2008 at 09:32 AM.
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  #33  
Old 03-26-2008, 08:51 AM
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Quote:
Originally Posted by winmutt View Post
*cough* Doesn't that mean the transmission is not centered? Make sure it is centered and try putting some washers inbetween the frame in the mount to let the transmission hang down a bit more.
I'll look into this, I thought it looked pretty centered... how did you measure/mount yours?
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  #34  
Old 03-26-2008, 10:14 AM
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Quote:
Originally Posted by Bajaman View Post
I'll look into this, I thought it looked pretty centered... how did you measure/mount yours?
I had the OEM parts . Look at your flex disc. If it is flexing when not moving you have to much of an angle on the U joint. When I put those washers in the angle was decreased as well as the angle in the flex disc.
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  #35  
Old 03-26-2008, 10:37 AM
Automch
 
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Just a guess

I do not remember the setup on manual shift Benzs but most engines require a pilot bearing inserted in the end of the crankshaft to center the input shaft of the trans. With an automatic you have the hub of the torque converter in the same hole. No where in your posts did I notice the mentioning of a pilot bearing. Did you put one in? If it is not there the input shaft will not be held in proper alignment and will cause a vibration. It will also lead to premature input shaft bearing failure. HTH.
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  #36  
Old 03-26-2008, 10:46 AM
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Quote:
Originally Posted by automch View Post
I do not remember the setup on manual shift Benzs but most engines require a pilot bearing inserted in the end of the crankshaft to center the input shaft of the trans. With an automatic you have the hub of the torque converter in the same hole. No where in your posts did I notice the mentioning of a pilot bearing. Did you put one in? If it is not there the input shaft will not be held in proper alignment and will cause a vibration. It will also lead to premature input shaft bearing failure. HTH.
Yes, it's got one.
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  #37  
Old 03-26-2008, 10:50 AM
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I'm sure you have this covered but, the tranny mount is not centered on the cross member (Left to Right) and could be turned around. The "big" holes face aft/the tranny sits more to the passenger side of center. Just a thought as I once got the cross member turned around.
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  #38  
Old 04-03-2008, 09:35 PM
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Slightly off topic, but why does the drive shaft from a manual transmission car have to be shortened when putting a manual into a car that used to have an automatic? Is the engine (from an auto) different from an engine with a manual?
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  #39  
Old 04-04-2008, 06:18 AM
ForcedInduction
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The 5 cylinder engine is 4" longer than the 4-cylinder engine so the driveshaft has to be cut down to compensate for that difference.
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  #40  
Old 04-05-2008, 10:05 PM
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Oh, so to remove an automatic from a 240 and put in a manual would be a bolt in replacement then?
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  #41  
Old 04-05-2008, 10:11 PM
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If you use the drive shaft from the manual 240D donor, yes.
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  #42  
Old 04-06-2008, 12:13 AM
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I thought the manual and automatic trannies were different lengths. They were when we put a manual tranny in my 300cd. The ds had to be lengthened.

Tom W
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  #43  
Old 04-06-2008, 04:09 PM
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I have a drive line vibration on the wagon conversion I did as well.. it has to be the Ujoint.. OR that is my next attempt, just as soon as the ground dries out.. also i have had an engine vibration develop in the last thousand miles, which was not there last summer when the manual transmission was installed.. so I don't think it is an imbalance condition in the flywheel, but something else.. or that is what i Hope.
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  #44  
Old 04-07-2008, 08:15 AM
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The auto tranny is indeed longer, by about 6"
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  #45  
Old 04-07-2008, 08:57 AM
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He meant the 240D manual shaft had to be shorten to work in a 300D.

Quote:
Originally Posted by t walgamuth View Post
I thought the manual and automatic trannies were different lengths. They were when we put a manual tranny in my 300cd. The ds had to be lengthened.

Tom W
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