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-   -   LSD (https://mbworld.org/forums/c63-amg-w204/732173-lsd.html)

bentz69 01-06-2019 08:45 PM
LSD
 
I figured my car didn't have the oem lsd since it didn't show up in a vin check. But when I check the VMI it has a "diff svc synthetic" listed at 5337 miles. I assume this is the required lsd drain and fill even though thats supposed to happen at 2000 or 2500 miles. That made me think I had the oem lsd. I jacked the rear up, put in neutral, rotated a rear wheel and the opposite side didnt move. Safe to say there is no lsd?


https://cimg5.ibsrv.net/gimg/www.mbw...030a958794.jpg

gtracer 01-06-2019 11:08 PM
If you couldnt feel that your car has an LSD by driving it, theres a problem..

AMGonFire 01-07-2019 10:14 AM
Yup no lsd

sventastic82 01-07-2019 04:44 PM
The other wheel should turn no matter what differential is in there.
Maybe you had the car in neutral and the drive shaft turned instead of the other wheel.

bentz69 01-07-2019 05:59 PM
Originally Posted by gtracer (Post 7647662)
If you couldnt feel that your car has an LSD by driving it, theres a problem..
I dont get deep into the throttle unless I'm on the highway so I dont see a problem here. I'm not spinning tires from light to light on side streets

Originally Posted by AMGonFire (Post 7647931)
Yup no lsd
:(
Originally Posted by sventastic82 (Post 7648280)
The other wheel should turn no matter what differential is in there.
Maybe you had the car in neutral and the drive shaft turned instead of the other wheel.
The car was in neutral. I was using the instructions from this post
https://mbworld.org/forums/c63-amg-w204/619820-oem-amg-lsd-picture.html#post6750090

sventastic82 01-07-2019 10:08 PM
Originally Posted by bentz69 (Post 7648353)
I dont get deep into the throttle unless I'm on the highway so I dont see a problem here. I'm not spinning tires from light to light on side streets


:(


The car was in neutral. I was using the instructions from this post
https://mbworld.org/forums/c63-amg-w204/619820-oem-amg-lsd-picture.html#post6750090



It doesnt work if the drive shaft is turning and the other wheel isn’t. That doesn’t tell you anything.
Leave it in P and turn one wheel the other will turn as well. Same driving direction = LSD

BTW I installed a LSD in my black C63 (RIP)
I wasn’t able to tell the difference under normal driving.
Don’t feel bad if you can’t tell the difference. everybody else who are able to, most likely took them to a track, burned some rubber or think they can tell the difference.

tphss 01-07-2019 10:10 PM
I believe all cars that have the suede/alcantara and leather combo steering wheel (as opposed to a full leather steering wheel) from the factory, came also with an LSD in the same package. Mine has that type of steering wheel and has an LSD (P30 package). Hope this helps.

sventastic82 01-07-2019 10:36 PM
Originally Posted by tphss (Post 7648515)
I believe all cars that have the suede/alcantara and leather combo steering wheel (as opposed to a full leather steering wheel) from the factory, came also with an LSD in the same package. Mine has that type of steering wheel and has an LSD (P30 package). Hope this helps.
P30 was for the pre face lift only. P31 replaced P30 in the face lift model.
The LSD was included in the P30 but for the P31 it became an option.

tphss 01-07-2019 11:17 PM
Oh thanks, I remembered some differences but didn’t remember this.
So the vin decoder or markings on the diff casing doesn’t specify an LSD? You have to lift the car up and turn a rear wheel on a P31 car?

Btw could you get a facelifted C63 built with a factory LSD but without the P31 back then?

AMGonFire 01-08-2019 12:55 PM
Originally Posted by tphss (Post 7648562)
Oh thanks, I remembered some differences but didn’t remember this.
So the vin decoder or markings on the diff casing doesn’t specify an LSD? You have to lift the car up and turn a rear wheel on a P31 car?

Btw could you get a facelifted C63 built with a factory LSD but without the P31 back then?
i have a 2012 non pp with a factory lsd so answer is yes.

bentz69 01-08-2019 07:54 PM
Originally Posted by sventastic82 (Post 7648513)
It doesnt work if the drive shaft is turning and the other wheel isn’t. That doesn’t tell you anything.
Leave it in P and turn one wheel the other will turn as well. Same driving direction = LSD
I'll give it a try. Any idea why the other guy mentioned to leave it in neutral?

AMGonFire 01-08-2019 08:33 PM
Originally Posted by bentz69 (Post 7649314)
I'll give it a try. Any idea why the other guy mentioned to leave it in neutral?
i did the same thing as you. I wanted to make sure after I had work done to fix an issue with my diff it was working properly. Jacked up the car, put in neutral, spun the wheel on one side the other wheel went in the same direction. LSD was functioning.

roadkillrob 01-08-2019 09:14 PM
Originally Posted by tphss (Post 7648562)
Oh thanks, I remembered some differences but didn’t remember this.
So the vin decoder or markings on the diff casing doesn’t specify an LSD? You have to lift the car up and turn a rear wheel on a P31 car?

Btw could you get a facelifted C63 built with a factory LSD but without the P31 back then?
The VIN will report option 471 for LSD if you don't have option 471 from the VIN decode you don't have an LSD (unless it was aftermarket added), even if it was packaged with other stuff, the VIN will show 471 (the proper datacard from EPC or from the thread on here not those crappy VIN decode websites that don't always show everything).

sventastic82 01-08-2019 09:52 PM
Originally Posted by bentz69 (Post 7649314)
I'll give it a try. Any idea why the other guy mentioned to leave it in neutral?
It should work if you have the car in neutral. But if for some reason the other wheel had some resistance which kept it from turning. (Some corrosion on the disk of parking brake catching a little) the drive shaft will spin.

bentz69 01-08-2019 10:05 PM
Originally Posted by AMGonFire (Post 7649339)
i did the same thing as you. I wanted to make sure after I had work done to fix an issue with my diff it was working properly. Jacked up the car, put in neutral, spun the wheel on one side the other wheel went in the same direction. LSD was functioning.
Well my problem is one wheel spun and the other didnt move while the car is in neutral.

Originally Posted by roadkillrob (Post 7649386)
The VIN will report option 471 for LSD if you don't have option 471 from the VIN decode you don't have an LSD (unless it was aftermarket added), even if it was packaged with other stuff, the VIN will show 471 (the proper datacard from EPC or from the thread on here not those crappy VIN decode websites that don't always show everything).
My vin doesnt show option 471 but a service history report shows a differential service at 5000 miles when the car went back to the dealer for its first ever service. What possible reason would a differential synthetic service be performed on a car that doesn't have an lsd. Maybe a leaking diff that needed to be opened but theres no indication of that on the service history

Originally Posted by sventastic82 (Post 7649418)
It should work if you have the car in neutral. But if for some reason the other wheel had some resistance which kept it from turning. (Some corrosion on the disk of parking brake catching a little) the drive shaft will spin.
I tried to spin each wheel on it's own and the opposite side didnt move. Is trying this method in park as opposed to neutral the same thing?

I guess short of opening the diff I'll never know. Dont want to open the diff with intentions of using lsd synthetic only to find a non lsd and having to pour back in the fluid that drained. Or I can just buy both types of fluid and see what happens lol

roadkillrob 01-08-2019 10:29 PM
Originally Posted by bentz69 (Post 7649432)
My vin doesnt show option 471 but a service history report shows a differential service at 5000 miles when the car went back to the dealer for its first ever service. What possible reason would a differential synthetic service be performed on a car that doesn't have an lsd. Maybe a leaking diff that needed to be opened but theres no indication of that on the service history
There is no 5k service, first is 10k and first trans is 40k. All those things where changes at 5k, so owner requested all fluids changed, possibly car was 1 year old so was due for engine oil, but diff and trans changed means an owner that cared and paid to have them changed likely after broken in, but doesn’t mean you have an lsd.

chrisridebike8 01-08-2019 11:24 PM
You don't have an LSD. In neutral, an LSD will spin both wheels the same direction. In park, you won't be able to spin them (the clutches will want to spin the wheels together, which is why they won't spin, like trying to drive the car in park). In neutral, an open diff will spin one wheel and the driveshaft or spin both wheels in opposite directions. In park, an open diff will spin the wheels different directions.


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