Hey guys,

I just picked up my Os Giken LSD and AMG finned differential cooler. I took the liberty of takings some pics because I am getting all this installed tomorrow.

On the pics you can see the LSD, the OS Giken gear oil, the new differential cover for a finned AMG cooler and 2 bolts.

Cooler part numbers:
A 171 351 0108 (cooler)
A 204 351 06 08 (cover) NOT SHOWN
A 04 021A1 (bolts)

The LSD was purchased from Renntech USA, great service from Tomas! Finned cooler and cover from parts.com and the 2 bolts from the dealer.

I'll give some feedback when the the differential is installed but the cooler will have to wait to be tested this summer, it's -20 celsius here!

That is smart to install the cooler the same time with the diff to save on labor. Is there a gasket incl w/the cover?

Is there supposed to be one? lol

The installers are differential pros, they'll figure it out I hope. They have done other 63s in the past.

The rear cover that is in the pictures is not correct for the cooler. It looks like the normal cover. There is no gasket though. It just uses sealant.

I took the info from this thread: https://mbworld.org/forums/c63-amg-w...al-cooler.html

From the workshopmb: "The finned cooler 171 351 01 08 @ $123.75 and two additional bolts, about $25.00 and you will also need the rear diff cover, as the stock unit does not have the bolt holes for the fin to mount pn# 204 351 05 08 @ $162.81 "

All part numbers seem right, unless the info was wrong...

Just double checked a diagram here and verified the part number, all seems ok and the 2 upper holes are there...

http://partscatalog.ru/mercedes/F/ca...376/69M/35/015

http://partscatalog.ru/mercedes/F/ca...277/62Q/35/015

Looks to be the wrong cover.. PN is A 2043510608

Damn it, need to call MB!!! thanks

The weirdest and most misleading thing of all is that parts.com says "Axle cover, c63 amg 2008 - 2010" for part number A 204 351 05 08

So its for the right car, but its the same as stock it appears...

204 351 06 08 is labelled as the E63 axle cover.

Anyways I'll keep you posted.

The differential installers did mention the LSD is made from billet steel and is virtually indestructible, so at this point I might not get the amg cooler installed if the axle cover part is not right...

Looks like the LSD is $3200 on the renntech site. That seems to be a bit on the expensive side..

Yes you will need MBZ part # 204 351 06 08 for the rear cover with diff cooler

As for the gasket, for the rear cover... no gasket is required all you need is MBZ part # 003 989 98 20 10

James@ACG

I haven't installed my Quaffe yet, what's your thoughts on the need to have the finned cooler installed as well? Our next event is late Feb at Sebring but I do live in Florida and we always have at least one track event in the summer.

HH: My opinion is that the cooler the better, especially when tracking/racing. You have the pumpkin apart and the additiobal labor to install the cooler is just the two screws holding it in.

I just had the same thoughts since I won't have the right cover for the install and will skip it for now.

The owner of the shop that has been building 8 second dragsters told me that my differential would never overheat and to have no worries (something about how fast it turns, coeffecient of 2.38 etc, no idea what it meant). He tought the finned cooler was not necessary for this specific LSD.

I'll check how it goes this summer and if I see it heating a lot at the race track I'll order the correct cover and pay the extra labor to get it put in, it's not very expensive, around a 2-3 hour job.

Also for the install, the only thing the shop mentionned is that they had to put new seals, that's it, no extra parts. They do have to grind the stock housing, this can be done by a shop of directly from Renntech (you do have to send the stock housing which can be a bit annoying for you and the garage).

They can work on the price depending on the season and availability. I have a mentality of buying the best so I don't have to change it in the long run, even if it involves waiting longer. I found that everytime I buy cheaper stuff I end up switching for more expensive parts a year later, so in the end its more expensive.

Picked up my car today and wow!

Official review coming soon in around 2 weeks to get a good feel of the car. The initial traction improvement is quite noticeable, like someone is pushing the back wheels when stepping on the gas. There is also some traction tightness that is tough to describe.

Can't wait to try it on the track this summer. Looking for a 10% improvement in lap times!

Nice to hear! That's a great product - where will you be running the car?

Thanks! Well I usually go to Calabogie (ON), Mosport (ON) and ASE(QC). Will definitely go to Mont Tremblant (QC) this year and maybe some US tracks if the timing is good. Also hit the 1/4 mile when the snow melts!

You should look up Doug Asally and Travis Hill from DAS next time you're at Calabogie. Great guys - we're looking into setting up a track day with them in the Summer.

Well it's been a while and I have had some time to really test out the diferential.

Let's start:

First things first, for people looking to get an LSD for winter driving, not a good idea. I feel the car slides a bit more in snow than the stock car. Since wheel spin is not matched and regulated, the car seems to slide on one side or another (a little bit) if traction is bad since the LSD corrects the traction. On the pavement (see below) its amazing, on snow, not so much.

The first time I could originally push it was 2 days ago when it rained. In Comfort mode and with winter tires, I pulled off the best acceleration I have seen with this car. Yes I know it doesn't make any sense. Not only was the acceleration excellent, even in C mode, the traction control did not engage at any time.

So WOT, winter tires, rain, not even a slight loss of traction. I must say that at this point, I can't wait to hit the track. What's going to happen with race slicks on a dry track?

Overall an amazing purchase, but I wouldn't recommend it for winter driving after trying the stock and the lsd. You can still drive it, but that should not be its main purpose.

take care!

Thank you for your feedback

I going to order one I live in AG in summer the temperature reaches 50 degrees Celsius I should use the cooler or no need

I will use it for street racing not on track

Thanks for the feedback chief. I had a Quaife installed this week and the traction improvement when slamming it from 20 or 30 mph is way beyond what I was expecting. This weekend I will have a chance to play at Sebring with it's 17 turns. From what I have felt so far corner exit speed is going to be much improved.

Great stuff let me know. I can understand why people said you need an LSD to race this car. You can live without it but it's clear to me now the C63 will be a track monster.


Also just a note that since I did not have the right LSD cover, the finned cooler was not installed. I'm not going to get it installed right away and wait until I track the car. If it heats up I'll get it installed, if not I'll wear it around my neck and scream "Yo Yo AMG in the place to be"

All jokes aside as mentionned the installer mentionned that this unit should never overheat. We'll see about that.

Is that Frodo?? LMAOOO

I'm glad that someone addressed the cooling fin issue. Because the last time, I had my C63 on a lift, I assumed that it had a differential cooling fins, but I was wrong. I know that my E63 has them. The C63 doesn't have any pervisions for mounted the cooler fins to the diff cover. And secondly, I don't know if AMG has ever installed cooling fins on a C63?

Yes I thought I was missing a co-driver in the pic. I figured that if Frodo could get to Mordor, he was probably good enough to guide me around the track. lol