PeachParts Mercedes-Benz Forum - What direction does the Driveshaft spin?

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Mister Byrnzoil

01-23-2007 01:24 PM

What direction does the Driveshaft spin?

If you are facing the car, the engine turns clockwise, does the driveshaft also rotate clockwise? (assuming car is traveling forward)

I just cant see it alone.

thanks!

junqueyardjim

01-23-2007 01:40 PM

Guaranteed!

I'll guarantee three things. That with the engine running and transmission in neutral the drive shaft will not turn, that in reverse it will turn opposite the engine and that in any forward gear it is turning the same way as the engine.

Mister Byrnzoil

01-23-2007 02:02 PM

dang, that means I installed the front flex disc backwards (like the PO had it installed D'oh)

Surf-n-Turf

01-23-2007 02:12 PM

Quote:

Originally Posted by Mister Byrnzoil (Post 1397320)

dang, that means I installed the front flex disc backwards (like the PO had it installed D'oh)

Backwards??:confused:

vstech

01-23-2007 02:15 PM

Quote:

Originally Posted by junqueyardjim (Post 1397285)

I'll guarantee three things. That with the engine running and transmission in neutral the drive shaft will not turn,

be carefull, on a lift, or with the back wheels off the ground, the driveshaft can indeed turn in neutral. ya better have that brake on!
John

Mister Byrnzoil

01-23-2007 02:41 PM

this is some sort of oddball (euro?) flex disc, I've searched the archives here and I've not seen a picture of one like it...

shot from the tranny side, see the raised 'bumper' on the right side of the hole? (note the brand new odometer cable!)

http://rbk3.com/mbz/IMG_1655.JPG

heres a shot from below...

http://rbk3.com/mbz/IMG_1653.JPG

you can see the 'bumper' in profile. I believe the bumper should indicate the direction of travel, sadly on this occaision it shows CCW.

The old flex disc was so really chewed up, but the writing faced toward the rear of the car, so I installed this new one the same way, but now I'm thinking that the reason the old disk was so chewed up is that it was installed backwards, and now I'm gonna have the same problem.

Surf-n-Turf

01-23-2007 02:49 PM

Quote:

Originally Posted by Mister Byrnzoil (Post 1397371)

I'm sure someone else here has seen that type before. I have done the discs on my 240D and 300DT and 420SEL and none of them looked like that. Maybe the place you got them from would know?? I can't imagine them being directional though.

Johnhef

01-23-2007 02:50 PM

Ive seen that style on later models but not on a 123 before.

Mister Byrnzoil

01-23-2007 03:21 PM

Quote:

Originally Posted by Johnhef (Post 1397388)

Ive seen that style on later models but not on a 123 before.

it was freaking expensive, 2x as much typical 123 flex discs. I got the part from phil.

rrgrassi

01-23-2007 03:32 PM

A directional flex disk:confused: What happens to reverse now?:eek:

aladinliverpool

01-23-2007 04:06 PM

I remember when i had to replace mine. There was german raised moulded writing on it that the parts guy told me had to face the rear of the car.

did yours have this on?

Johnhef

01-23-2007 04:18 PM

I know for sure I've seen them on 202's. I never checked but I guess my euro 300TD would have those too, I've never even looked under the car yet ;)

Mister Byrnzoil

01-23-2007 04:35 PM

Quote:

Originally Posted by aladinliverpool (Post 1397497)

I remember when i had to replace mine. There was german raised moulded writing on it that the parts guy told me had to face the rear of the car.

did yours have this on?

I put the side w/ the part number on it facing toward the rear of the car

Wes Bender

01-23-2007 06:13 PM

Depends upon whether you are north or south of the Equator.....

mespe

01-23-2007 09:32 PM

Quote:

Originally Posted by junqueyardjim (Post 1397285)

I'll guarantee three things. That with the engine running and transmission in neutral the drive shaft will not turn,

NOT TRUE!!! ever wonder why MB states that you MUST disconnect the driveshaft when towing a car? Also engien running, tranny in nuetral car goind down hill,, tell me that thing aint gonna spin.

79300sdtd

01-24-2007 01:50 AM

Quote:

Originally Posted by mespe (Post 1397859)

NOT TRUE!!! ever wonder why MB states that you MUST disconnect the driveshaft when towing a car? Also engien running, tranny in nuetral car goind down hill,, tell me that thing aint gonna spin.

that is because while in tow the back wheels are spinning there for the drive shaft is spinning. if the car is sitting still in neutral the drive shaft is not moving.

Mister Byrnzoil

01-27-2007 08:43 PM

Quote:

Originally Posted by Johnhef (Post 1397513)

I know for sure I've seen them on 202's. I never checked but I guess my euro 300TD would have those too, I've never even looked under the car yet ;)

I have not looked under my '80 yet either

The 84 has a getrag transmission, maybe this disc accomodates a different output flange?

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