|
|
|
|
|
#1
04-02-2008, 09:23 AM
|
|||
|
|||
|
How hard is normal?
My '83 300D shifts hard and often early. Worst on 1-2 but happens 2-3. Sometimes there is a loud thunk when it hits 3rd. I took it to a Bosch certified mechanic and he said that it is shifting normal for this car. My whole body tenses up before each shift in anticipation. This can't be normal. I see lots of posts about hard shifting so I'm not sure what is normal.
And secondly, anyone in the Tampa area that is knowledgeable about these cars that would be willing to look at her? Maybe show me a thing or two about the vacuum system as this seems to be the most prevalent cause. Thanks for any help. 
|
|
#2
04-02-2008, 09:34 AM
|
||||
|
||||
|
if it is more than slightly firm, you have a problem. most likely the vacuum is leaking. these cars use vacuum to adjust how firm the car shifts.
do a search here for something like critical vacuum setting transmission. use the google search. Brian Carlton did an awesome write up and TONS AND TONS of followups make this a bookmarkable page.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
|
|
#3
04-02-2008, 09:37 AM
|
||||
|
||||
|
Hmm, I would have sworn it was Brian Carlton... well anyway, this is the thread I was discussing...
surely there are tons more out there. It's CRITICAL... how you set your transmission's vacuum system on your diesel MBZ...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!! 1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
|
|
#4
04-02-2008, 09:19 PM
|
|||
|
|||
|
Check the vac hoses
THere are a few vac hoses on my W124, don't know about yours, but mine were near the air filter and near the shut off valve. Both came off because I was replacing a filter, then later the shut off valve. Even aside from those, could definitely be a vac hose.
jeff
|
|
#5
04-02-2008, 09:45 PM
|
|||
|
|||
|
|
|
#6
04-02-2008, 10:06 PM
|
|||
|
|||
|
Unless you know that there are vacuum leaks in your system, the thing to do is T in a MityVac to the vacuum line that goes to the transmission modulator, run the line out the cowl, close and lock your hood, leaving the MityVac on the cowl where you can read it and go for a drive. Monitor your vacuum as you move through the gears at various throttle positions and see what your vacuum is doing.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
|
 |
| Bookmarks |
|
|
Linear Mode
