shampion

Hellow everybody
This is my first post in this forume. So I wish not making any miss.

I recently bought an 2004 S500 V8 RWD from a friend and it has broked rear differential. I bought a used one with higher ratio, mine were 2.65 and the new was 2.82. I was looking for better performance with higher ration so I go for it and was smiling but this didn't last long after I put the pumpkin into my Mercedes. The diff is put right into the place and once U took it for drive test. the surprise that I never exppect is that the transmission is not shifting and is due to diff change. Is what I did right, is it ok to change gear ratio or it is not possible and I have to put same number which is 2.65.

Thank you every body

NAbeel

gixxerboy

yes it went into limp mode, it not rotating at the speeds expected because of the different ratio. So it thinks something is wrong and puts the car in limp mode.

you will either have to go back to stock ratio or have the tcm reprogrammed for the correct ratio.

i'm doing a similar mod on my car to 3.06, i have a different year and different trans so mine is a little different. But if you contact most of the performance tuners they can program it for you if you ship it to them.

shampion

Thank you gixxerboy. indeed i am in tripoli and my problem is so huge. First the stock ratio here is not available. And my stock one is broken. Second, no one here brleived it could be reprogrammed. They beleive in only one fact "stock ratio cannot be changed".

if you can give me website, or any contact for a shop who can do this for me i will be so thankful.

It is better to bear the cost of shipping and reprogramming than seeing the Mercedes parked forever.

and what about transmission, is it capable of handling the new rato?

Thank you so much.

gixxerboy

i would contact kleemann, http://www.kleemann.dk/ they are doing mine but they have facilities in Europe too so they would probably be the easiest for you.

if that doesnt work i can let you know places in the US

Yes the trans will be fine. Different models come with different ratio's and the same transmission.

shampion

Many thanks. I sent them an email right now. I it didnt work out I will ask you for other contacts.

shampion

Hello Again gixxer boy;

I contacted Kleemann but it didn't work out as they are very very expensive. Could give me other names in the US. Euro area are very expensive as usual.

Many Thanks

shampion

Gixxearboy
Kleemann is good and they know wht they are doing, but they are costy. Do you have other names?

Many thanks

gixxerboy

eurocharged and speeddriven are both sponsors on this board can also do it

Speedriven1

This is 100% correct. Also ... where'd you get a 3.06. We're doing a 3.06! Have you, perhaps, begun to measure your rear end in inches? Say ... 8 of them? Maybe 10? Something in between?

gixxerboy

i spoke to you a while ago about doing mine,
Are you putting a 9inch in a benz?

Speedriven1

gixxerboy

i would love to see that when its done. Doing it in the CL?

Speedriven1

We're doing it on *A* CL ... and, you know, this thing that everyone forgot about:

gixxerboy

Love that car,

shampion

Really nice Benz

How much horsepower?

gixxerboy

thats who you should contact about the programing

shampion

Yah I got that. already sent them message but no reply

I will try again. BTW OEtuning has sent me a nice offer. are they good like the guys you adviced me to contact them.

Best
Nabeel

shampion

@Speeddriven
Can you program my TCU to accept the new gear ratio?
I can send it to you.

gixxerboy

I've never used them, people on here have written reviews about them. I was unaware they could program that.

gsfent

I had Renntech do something similar for me on my ML500. Went from 3.70 to 3.09. One of his computer whiz kids did the work.

I believe Renntech is now in Stuart, Florida.

Regards,
Jerry

gixxerboy

renntech wont do it unless they have the whole car.

Speedriven1

The guy you're looking for is Jeff Katz. He was the tuner at RT for years, and is now at European Starr in Sarasota.

Speedriven1

If it's the 5 speed then yes, you can send it to us and we can do the TCU tuning.

shampion

So how can contact you to get infromation like cost, your address, etc?

Many Thanks

Speedriven1

Cost is $595, with return shipping included. You can get our shipping address from our website www.speedriven.com , but I can give it to you as well: 647 S Vermont ST in Palatine IL 60067.