MBWorld.org Forums

SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Rear end gear swap?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Sep 21, 2007 | 02:47 PM
Share
  #1  
th550's Avatar
th550
Thread Starter
Junior Member
 
Joined: Aug 2007
Posts: 24
Likes: 0
From: San Antonio, TX
2007 SL550
Rear end gear swap?
Does anyone here have any experience with changing the rear end gears on the SL? The stock 2.56 ratio seems a bit long-legged for the US, especially given the governor limitation of 155 mph. I'm wondering what a lower set of gears would do for the acceleration, and what computer mods would have to be done to compensate.
Reply
0
Old Sep 25, 2007 | 01:40 PM
Share
  #2  
th550's Avatar
th550
Thread Starter
Junior Member
 
Joined: Aug 2007
Posts: 24
Likes: 0
From: San Antonio, TX
2007 SL550
Surely one of you tuner outfits has some knowledge on this? Dino? Anyone?
Reply
0
Old Oct 5, 2007 | 05:43 PM
Share
  #3  
th550's Avatar
th550
Thread Starter
Junior Member
 
Joined: Aug 2007
Posts: 24
Likes: 0
From: San Antonio, TX
2007 SL550
I'm really surprised this hasn't been tried before. Am I wrong in thinking this would make a big difference in acceleration? Are the ECU changes just not possible or too hard?
Reply
0
Old Oct 5, 2007 | 11:18 PM
Share
  #4  
kokanee's Avatar
kokanee
Senior Member
 
Joined: Dec 2006
Posts: 358
Likes: 0
From: Vancouver Canada
07 ML63 Silver Dead at 85k, 14 RS5, 05 SL600
Agreed! Most vehicles built for 1/4 mile do not do 200 mph. I would think a similar result could be obtained with a smaller od tire as well. Same speedo error but less unsprung weight. It would be interesting to see the results of a rear end swap or 285/30 R18 or some such tire would have on the acceleration.
Reply
0
Old Oct 6, 2007 | 12:55 AM
Share
  #5  
SUNILP's Avatar
SUNILP
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: May 2003
Posts: 4,005
Likes: 106
From: Houston, TX
2015 E250D
ECU change has to be done if you do a rear gear swap and dealerships cannot do those but I know who can....
Reply
0
Old Oct 8, 2007 | 09:21 AM
Share
  #6  
th550's Avatar
th550
Thread Starter
Junior Member
 
Joined: Aug 2007
Posts: 24
Likes: 0
From: San Antonio, TX
2007 SL550
Do you know what other gears are available for that housing? Also, assuming you mean yourself on the ECU changes, how much do you charge to reprogram? Thanks for the response!
Reply
0
Old Oct 8, 2007 | 11:02 AM
Share
  #7  
SUNILP's Avatar
SUNILP
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: May 2003
Posts: 4,005
Likes: 106
From: Houston, TX
2015 E250D
I would have to hook the star to a car and see what options are available. I will try to do that next week.
Reply
0

Trending Topics

Old Oct 8, 2007 | 03:46 PM
Share
  #8  
th550's Avatar
th550
Thread Starter
Junior Member
 
Joined: Aug 2007
Posts: 24
Likes: 0
From: San Antonio, TX
2007 SL550
awesome! thanks
Reply
0
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Tags
Back to Subforum
SL-Class (R230)
View Next Unread
Renntech, Evotech, Kleeman, Wetterauer and other Tuning companies

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes, average.
Show Printable Version
Email this Page

Advanced Search

All times are GMT -4. The time now is 07:22 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE