Well. It's now winter time and time to put the mighty 600SL 107 down for some mods. Most needed is the LSD upgrade. The options are few. Phantom Grip or Roncallo Grip. I don't like the Phantom Grip solution as it looks to me like a band aid that just makes metal in your diff.

Last year I had delusions of grandeur, that these diffs would be just like the Chevy and Ford units I am so much accustomed to. I was hoping to luck out and swap the 140 carrier with the 107 LSD carrier. Well that isn't going to happen and the reason is obvious in the photos.

So now I'm evaluating the possibility of modifying the 140 carrier to accept clutches. So I now have both diffs apart and the job does like like a possibility with a lot of machine work.

1) The space between the side gears in the 140 is less than the space in the 107. There are two solutions to this, First shave the clutch spline down on the 107 side gears about 2.5 mm and use 1 less friction and steel. Or spot face the inside of the carrier to widen it. Or probably some combination of both. Using Kevlar lined clutches should make up for the lack of one disk.

2) The inner diameter of the 140 carried is cavernous. This leaves nothing to work with to engage the clutch steels plates. A slip in retainer must be made to do this. See the photo of the retainer I have designed, which will require machine work of the carrier to install.

3) Note to self. If I ever do this again it will be with a Ford or Chevy diff where I can get any ratio I want with or without LSD for about $100.00

4) If I pull this off I will be the Mod God.

Attached Thumbnails

     

__________________
To see my 129 parts for sale visit:
http://stores.ebay.com/The-Mercedes-SL-Store
John Roncallo