|
|
|
|
|
|
|
#1
11-11-2004, 01:29 AM
|
||||
|
||||
|
87 300E transmission
I have 110,000 miles on my trans - the first half of which were relatively indifferent maintenance, sedate driving; the last half of the miles were very well maintained (usually early fluid changes) but very sporty driving mixed with stop and go freeway driving). Recently, the trans has started making a 1-2 second slip on the 2-3 shift, only on the first shift of the day as I accelerate into the crowded 45 mile zone hiway in front of my house. All other shifts are normal for the rest of the day, with crisp shifts and no hint of slipping.
Also, as I come to a stop, there is a muted clank-click-clunk from the drive train at each stop starting at about 5-7 mph down to completely stopped(the drive train front and rear flex disks were replaced at about 60,000 miles, so may be due again?). With the trans doing this brief slip, however, I wonder if this is also related to the trans instead of the disks. Any advice or recommendations on this situation would be appreciated!
__________________
John 2003 Firemist Red/grey leather SL 500 2015 Palladium Silver/black mbtex GLK 350 1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD) Click to see 87 300E 
|
|
#2
11-11-2004, 09:17 AM
|
|||
|
|||
Vacuum to the trans modulator is first thing to check. Need to "T" in a vacuum guage to the modulator & watch the vacuum changes durning the problematic time in the morning. IF the modulator is original that also would be a starting place, replacement!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
|
|
#3
11-11-2004, 10:18 AM
|
|||
|
|||
|
I have the same problem with the transmission ('90 420sel) but not the noise. I have replaced the modulator, put in a K1 kit and changed fluid and filter - still there. This only occurs when it is below 55 deg. Anyone have any other suggestions? (This trans. was just installed two years ago - it was used with around 80,000 miles on it - did this last winter and is starting in on it again this winter.) I can't tell if it is flairing or if it is not wanting to shift.
|
|
#4
11-12-2004, 12:59 AM
|
||||
|
||||
|
Thanks for the info! I will check this out asap. Is this modulator the same as the 'AT modulator valve' listed on Fastlane, "Trans: 722.320, Black, Use with 126 277 93 75 modulator valve pin, Year: -1988"?
__________________
John 2003 Firemist Red/grey leather SL 500 2015 Palladium Silver/black mbtex GLK 350 1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD) Click to see 87 300E
|
|
#5
12-09-2004, 07:24 PM
|
||||
|
||||
|
My Tech replaced the modulator, and pulled the trans to re-do some leaking seals (pump seal, B-1 reaction valve, output shaft). While it was out the rear main seal was done, along with the front flex disk. Replacing the differential mount and 4 worn control arms finished the job, and it rides, shifts, and handles like a new car! Thanks for the tip, M B Doc!!!
__________________
John 2003 Firemist Red/grey leather SL 500 2015 Palladium Silver/black mbtex GLK 350 1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD) Click to see 87 300E
|
|
#6
12-09-2004, 07:54 PM
|
|||
|
|||
|
Coooool.
Where are the four control arms, and what do you suspect this cost?
__________________
Paul S. 2001 E430, Bourdeaux Red, Oyster interior. 79,200 miles. 1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
|
 |
| Bookmarks |
|
|
Hybrid Mode
