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

Mister Byrnzoil · #1 01-23-2007, 01:24 PM

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 · #2 01-23-2007, 01:40 PM

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 · #3 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 · #4 01-23-2007, 02:12 PM

Quote:

Originally Posted by Mister Byrnzoil

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

Backwards??

vstech · #5 01-23-2007, 02:15 PM

Quote:

Originally Posted by junqueyardjim

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 · #6 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 · #7 01-23-2007, 02:49 PM

Quote:

Originally Posted by Mister Byrnzoil

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.

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 · #8 01-23-2007, 02:50 PM

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

Mister Byrnzoil · #9 01-23-2007, 03:21 PM

Quote:

Originally Posted by Johnhef

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 · #10 01-23-2007, 03:32 PM

A directional flex disk

What happens to reverse now?

aladinliverpool · #11 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 · #12 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 · #13 01-23-2007, 04:35 PM

Quote:

Originally Posted by aladinliverpool

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 · #14 01-23-2007, 06:13 PM

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

mespe · #15 01-23-2007, 09:32 PM

Quote:

Originally Posted by junqueyardjim

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.