Help - Missing Vacuum Modulator Spring? - PeachParts Mercedes-Benz Forum

DAVID LEE · #1 03-26-2008, 10:22 AM

Just an update - Last night I decided to take the car a few blocks to get something to eat and lo and behold the car is shifting at the appropriate shift points - Yea!!!. I do need to adjust the modulator due to flaring between 3 & 4 (I hope it's not some other issue, but won't rule out due to some documentation I've read.), but "somehow" something got fixed while it was sitting in my garage.

This has been quite an experience - one that I'm not sure I want to repeat, but as time lapses and memories of the struggles wane, I may attempt again.

Good luck to anyone attempting a rebuild.

Some things I didn't do, but should have due to simply not carefully reading the rebuild manual.

1. Drill out the rivits in the K1 and K2 clutch and change the o-rings (might be my flaring problem). This just seemed like something that could go really wrong and I decided not to take the risk of screwing up the whole assembly.
2. Insure the metal clutch plates went back in the correct order. Yes - there is more than one thickness of metal plates and the manual (The Benz version) says to put them back in a particular order.

fred1948 · #2 03-26-2008, 11:09 AM

Quote:

Originally Posted by DAVID LEE

Just an update - Last night I decided to take the car a few blocks to get something to eat and lo and behold the car is shifting at the appropriate shift points - Yea!!!. I do need to adjust the modulator due to flaring between 3 & 4 (I hope it's not some other issue, but won't rule out due to some documentation I've read.), but "somehow" something got fixed while it was sitting in my garage.

This has been quite an experience - one that I'm not sure I want to repeat, but as time lapses and memories of the struggles wane, I may attempt again.

Good luck to anyone attempting a rebuild.

Some things I didn't do, but should have due to simply not carefully reading the rebuild manual.

1. Drill out the rivits in the K1 and K2 clutch and change the o-rings (might be my flaring problem). This just seemed like something that could go really wrong and I decided not to take the risk of screwing up the whole assembly.
2. Insure the metal clutch plates went back in the correct order. Yes - there is more than one thickness of metal plates and the manual (The Benz version) says to put them back in a particular order.

Did you do anything with the valve body?
I took mine completely apart and cleaned everything (required the better part of the day as I was very careful to keep all the parts in order and clean them individually just before reassembly). There was a lot of sludge in the valve body and some of the valves were difficult to remove because they were sticking. On reassembly everything moved freely. I also installed the K1 spring upgrade kit in the valve body. The part number for the kit is 126 270 44 77 and the price from the local dealer was $7.00. At first they told me that this was not a good part number because it wasn't listed on the EPC. They then checked on another computer and found the part number, so be persistent if you get told that it is not a good number! This kit is designed to prevent 2-3 shift flare.