I don't think there is a chronic issue. Besides myself and the one other recent post, I've never heard of one blow... Of course my car is 8yrs old and I beat the hell out of it at the track. Don't think it's really designed to launch off the ebrake, on 2 lbs of boost, with Mickey Thompsons... Lol

I only wish there was an easy conversion to use an R200...

Unfortunately, the SRT6 and SLK32 are the only ones that share this diff.

And Bob, thanks for the offer. I'll give you a ring if I need a hand!

 

I can make an r200 happen.

 

ok, you have my attention!

How and how much? Lol

funds are short at the moment, but I'd like to work this out for the future...

 

A buddy of mine runs of fab shop down here, he's put r200 in everything, from a 700hp to his 1uz-fe toyota tacoma drift truck, complete with z32 rear suspension.

I'm gonna climb under my car and look at the diff mounts and see how they compare, maybe do some measuring, then i'll talk to him

 

Infinite - I like how you think... definately let me know if you make any progress. I haven't messed around with Benz's too much, since they are expensive to break. lol Most of my mod experience comes from working with my buddy on Supras.If you watch Pinks, He's the guy that ran the blue MKIII and beat the Chevelle. Since your right up the road, maybe we can meet up at an event this spring. Love picking peoples brains for new ideas.

 

Well, I'm still in the market for a rear diff... The one that Soward sent was a 3.27 ring diff for a N/A. For future ref, it's easy to spot as the companion flange is smaller on the 3.27. Of course I didn't notice til I got it up in place and the bolts didn't line up...

 

That totally sucks. Sorry to hear that Alan.

 

Hey Infinite, what's an R200? Do you mean the punkin out of a Mercedes R200 platform? Why is it better? How will you get around the computer related problems of changing the gear ratios?

Just curious,
Tom

 

The R200 is a differential for the Nissan Z series cars.

 

The r200 is a diff out of the 300zx/240sx/j30 cars, pretty much every rwd nissan made through the mid 90s and its bullet proof. We have welded diffs supporting 700+ hp without a problem.

 

Oh no!!! Rice in the rear? Well, if there strong they're good. Why o why couldn't you use something ...... less Datsun? Probably made from scrap metal purchased from the good ole USA anyway. Could you at least stamp AMG on it so it's hard to tell where it came from? (gosh, I hope I don't need one ..... dang it, already do!)

Les

 

There are a lot of good stock rear diffs, it would just take too much money/effort to make them work... I'd take a Toyota TRD from an old Supra if I could... my buddy puts 700hp through one running mid 9's...

BTW, after much research, the AMG/SRT-6 rear uses ALL the same components as the N/A 6-cyl except the ring and pinion (gear ratio)... hence why the tiny spider gears didn't stand a chance...

 

The R200 differentials are probably superior in construction to the Mercedes units in our cars. Unfortunately. These diffs came from a time where money was no object (think late 80's and early 90's...the Gordon Gekko years.) Our diffs unfortunately came from a time of great cost-cutting at Mercedes.

 

when i put the 327 into my 6 i changed the front stub and installed a new seal the ring and pinion can be swapped and you are back in the running.

 

Sorry about that Buggin I'm not sure why that is. the number I sent you is strictly for the srt6. I ordered from the VIN as a replacement for my srt...

 

In thinking it over the spider gears only CARRY load when the wheels are going at different speeds ( rotational rate ).

THe phantom is one way to share or "" Balance "" the torque left ot right. It seems to me that the Phantom grip would reduce the stress on these gears.

Having said that, SHOCK LOADING of the tires is going to kill everything, wheels, axles, tranny, driveshaft and gears. Spin up a tire and then stop it, your overloading all parts and you will find out which one is the most fragile component.

Water box burnouts offer the best chance of having a tire grab and hurt something. I rather do a dry burn as it is not hard to spin the tires and there is no dry hop to fear at the end. If you have ever pulled the rear gears on this car, youll gain a sensitivity to the work involved, and have a better appreciation of the risks caused by burn outs.

Woody

 

amx - That would be my solution except that the pinion got chewed up... to top it off, you cant buy the pinion seperate from the ring. MB wanted $1030 for the set. I found a discount place on-line where I could get them for $708. Then I'd have to pay a shop to do the swap as I have no idea how to get the diff apart and wouldn't want to chance screwing up the shimming.

Waldig - I agree, that PG might help me out a little. I'm usually more careful with my burnouts: only doing a light spin to clean them off and roll to the line in one fluid move. I was hasty that night and did a "real" burnout... and your right, when the tires hooked(stuck), everything stopped and the weakest link broke.

Soward - I don't know... all the numbers match except that the MB dealer didn't give me the final "80". Thier part number was 202 350 97 14. I think that last number corresponds to the gearing. I will pop the cover and count the teeth. However, from my "rotation test"... this appears to be a 327.

And yes, pulling/installing this rear is NOT fun. Anyone have good instructions for completely disassembling the diff?

 

Counted the teeth... My OEM one has 46, the one I bought has 37 on the ring...

Looks like I may be buying a new ring and pinion and then send it out to get swapped. Damn this is getting expensive! Makes you double think racing your daily driver...

 

I can buy r200's all day for 50 bucks, lol.

 

But, can you make them work in a Crossfire? It won't much matter if they are 50 or 5000 bucks if we can't get them to play well with the computer.