Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-19-2003, 08:23 PM
mike690003's Avatar
Registered User
 
Join Date: Apr 2003
Location: Miami,FL
Posts: 807
300E shifting hard

Hello Board,

After driving in a friends 300E, I have come to realize that my car shifts too hard. The 2-3 upshift is harsh, especially with the A/C on. My friends 300E has the original tranny and my car has a dealer rebuilt unit. Could it be time to adjust the vacuum modulator?? My car does not leak any fluid and the fluid level is right.


Which direction should I turn the modulator for a smoother shift?

How much should I turn it?
__________________
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
http://memimage.cardomain.net/member.../352975_67.jpg
http://memimage.cardomain.net/member.../748335_24.jpg
Reply With Quote
  #2  
Old 10-19-2003, 08:48 PM
Bud
Guest
 
Posts: n/a
My '91 300E does exactly the same thing and it's done it since the car was brand new. If I have the HVAC on but turn the compressor off, the shifts are acceptable. It I turn the compressor on, the shifts are too hard.

I used to live in Minnesota so it wasn't too much of a problem but now I live in Arizona where we still are having 100 degree days and it's driving me batty.

I'm going to have the dealer fix the da*n thing when I get the transmission serviced.

I'll be interested to see how you resolve the problem.
Reply With Quote
  #3  
Old 10-21-2003, 02:44 PM
mike690003's Avatar
Registered User
 
Join Date: Apr 2003
Location: Miami,FL
Posts: 807
My car slowly developed this problem (over a one year period). Is it be time for to adjust the vacuum modulator?? My car does not leak any fluid and the fluid level is right on the money.

Which direction should I turn the modulator for a smoother shift?

How much should I turn it?
__________________
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
http://memimage.cardomain.net/member.../352975_67.jpg
http://memimage.cardomain.net/member.../748335_24.jpg
Reply With Quote
  #4  
Old 10-21-2003, 07:40 PM
savas's Avatar
Registered User
 
Join Date: Mar 2001
Posts: 1,162
Here is a great article that will probably answer some of your questions.

http://www.continentalimports.com/ser_ic20242.html
Reply With Quote
  #5  
Old 10-30-2003, 01:53 AM
mike690003's Avatar
Registered User
 
Join Date: Apr 2003
Location: Miami,FL
Posts: 807
Good article, but I was wondering if anyone knew how to adjust the hard shifting of the transmission via the vacuum modulator.

Does anyone know what direction to turn the little "t" bar adjuster to lessen the harshness of the shift?

The shift points are accurare, but it shifts too hard.
__________________
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
http://memimage.cardomain.net/member.../352975_67.jpg
http://memimage.cardomain.net/member.../748335_24.jpg
Reply With Quote
  #6  
Old 10-30-2003, 02:14 AM
zeronero's Avatar
Registered User
 
Join Date: May 2003
Location: San Francisco Bay Area
Posts: 426
Turn it counter clockwise. I had to turn mine nearly 2 full rotations to get it to where I like it.
__________________
1992 Mercedes-Benz 400E
2002 Mercedes-Benz ML500
Reply With Quote
  #7  
Old 10-30-2003, 02:16 AM
Registered User
 
Join Date: Sep 2002
Location: Denmark
Posts: 412
You turn the little "t-bar" counter-clockwise to get a smoother shift.

Mine also shifted very hard. I adjusted the t-bar as much as two full turns counter-clockwise before it shifted the way i wanted it. -Then it was flaring in the 2-3 upshift, so i turned it turn back again.
Now it shifts firm but not too hard and the flaring is minimized. (it still flares a little bit in the 2-3 shift on full throttle)

Freestyler
__________________
Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes!


'86 300E optically converted to '95 E300 (Sold)
-Blauschwarz on silver
-Black leather
-17" AMG & 15" AMG for winter
Reply With Quote
  #8  
Old 10-30-2003, 02:26 AM
mike690003's Avatar
Registered User
 
Join Date: Apr 2003
Location: Miami,FL
Posts: 807
Thanks a lot!

I will try one full turn counter-clockwise, and if that does not smoothen the shifting, I will work from there.
__________________
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
http://memimage.cardomain.net/member.../352975_67.jpg
http://memimage.cardomain.net/member.../748335_24.jpg
Reply With Quote
  #9  
Old 10-30-2003, 05:46 AM
Registered User
 
Join Date: Oct 2003
Location: Lancaster, CA
Posts: 23
Adjusting vacuum modulator

Where exactly is this adjustment made...I mean, where is this located and what does it look like?? My 2nd to 3rd shift drags out a bit.
Reply With Quote
  #10  
Old 10-30-2003, 07:18 AM
Registered User
 
Join Date: Sep 2002
Location: Denmark
Posts: 412
Re: Adjusting vacuum modulator

Quote:
Originally posted by Z300e
Where exactly is this adjustment made...
Lookie here..

On the picture in that thread you'll see the arrow point to a little black rubber cap. Get under the car. Remove that cap with a set of needle nose pliers. Pull the t-bar slightly out with the pliers and now you can turn it with your fingers. -Not much room up there though..

Freestyler
__________________
Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes!


'86 300E optically converted to '95 E300 (Sold)
-Blauschwarz on silver
-Black leather
-17" AMG & 15" AMG for winter
Reply With Quote
  #11  
Old 10-30-2003, 09:16 AM
TX76513's Avatar
Platinum Member
 
Join Date: Apr 2003
Location: Brandon, Mississippi
Posts: 5,166
Do I have an odd ball modulator It has a large dial like you would find on a timer switch. My movement is only between say 11 o"clock and 3 o'clock
__________________
BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)
Reply With Quote
  #12  
Old 10-30-2003, 09:33 AM
Registered User
 
Join Date: Sep 2002
Location: Denmark
Posts: 412
The modulator in the picture is not from a 300E. The 300E modulator is black where this is green. (maybe this is from a 300D? - can't remember what's what), but otherwise they look the same.
(T-bar pulled out and ready to turn in picture)

Freestyler
Attached Thumbnails
300E shifting hard-modulator.jpg  
__________________
Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes!


'86 300E optically converted to '95 E300 (Sold)
-Blauschwarz on silver
-Black leather
-17" AMG & 15" AMG for winter
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:52 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page