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 > ML, GL, G-Wagen, R-Class, Unimog, Sprinter

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-14-2004, 02:49 PM
Registered User
 
Join Date: Oct 2003
Location: San Jose, CA
Posts: 19
Transmission shifting at high shift points

I thought maybe this was just an anomaly, but now it's happened twice on my '98 ML320

Both times were after the car sat at work all day, and was happened after I started it to go home.

Normally the car shifts from gear to gear around 2200 rpm or so if I'm not stomping the gas.

But during these two times, the car never shifted until well above 3000-3800 rpm even though I was driving lightly

I got to about 50 mph, the car was still driving at around 3500 rpm (unlike around 2000 rpm when cruising at 50).

At a stop light shifting into neutral and back into 5 did not solve the problem.

Finally stopping the car, and restarting the car corrected the shift points.

Is this a bad sign? Is this a known problem?

Thanks,
Tim
Reply With Quote
  #2  
Old 01-14-2004, 05:03 PM
Gilly's Avatar
Registered User
 
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
I saw in your profile you have a 98. I'd have the codes read in the transmission control unit, start there. Could be something major going on, hard to tell. How many miles on it? Has anyone tried doing any maintenance work on the tranny; ie fluid change or anything like adjusting the fluid level?

Gilly
Reply With Quote
  #3  
Old 01-14-2004, 05:09 PM
Registered User
 
Join Date: Oct 2003
Location: San Jose, CA
Posts: 19
It's a 98 with 74,000 miles on it.

I just finished the 60k service, as recommended here (fuel filter, spark plugs). But I haven't had anything done to the transmission, and there isn't anything about transmission work in the service records.

Thanks,
Tim
Reply With Quote
  #4  
Old 01-14-2004, 05:16 PM
Gilly's Avatar
Registered User
 
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
Yeah, there is no service interval for the tranny fluid, just making sure no one has messed with it lately, it's really picky on fluid type (MB special atf) and level. I'd still lean towards getting the codes read to see if there are any DTC's in the transmission control unit.

Gilly
Reply With Quote
  #5  
Old 01-14-2004, 06:01 PM
Registered User
 
Join Date: Oct 2003
Location: San Jose, CA
Posts: 19
Thanks for the reply. I'll give the service center at the dealer a call and see what they say.

Thanks again, you're doing a great job here!

Tim
Reply With Quote
  #6  
Old 01-21-2004, 11:16 PM
Registered User
 
Join Date: Jan 2004
Posts: 2
You may want to check out my post of a few days ago. I had the same problem and outlined what it took to correct it. I would be very interested to learn how you resolve your condition. I still think I got hosed!
Reply With Quote
  #7  
Old 04-07-2004, 01:26 PM
Registered User
 
Join Date: Oct 2003
Location: San Jose, CA
Posts: 19
Finally took in the ML320

I finally got around to taking in my '98 ML320 to be looked at. What broke the camel's back so to speak, was that the Check Engine Light came on. Total times that I had the upshift problem over the course of 4 months, was only 5 times.

The final bill from the dealer to fix the problem: $896.14

Here's what they found and did:

For the not shifting past 3rd gear:
"Check Transmission after repairs, shifting ok. intermittently has rough down shift. Would not condemn transmission at this time. Shifting OK.

Test drove and verified, trans slipping badly, goes into limp home mode. Staying in third gear. Fluid level very low. Added two quarts transmission fluid. Adapted values at limit. Readapted transmission after top off fluid. Checked for leaks. No leaks at all from transmission. Checked cooling system OK. Check at ETC UC for leak from wiring. ALL OK. "

Charge for above: $350

For the check engine light/hesitation on cold engine:
"Check DTC P0170, P0173, P0700. Check for Vacuum leaks, OK, Found HFM voltage 1.03 w/key off, adapted values of engine at max 1.32 Replaced defective air mass meter and readapt engine. Clear Codes"

Charge for above: $515.18

Total cost for repair: $896.14

A bit pricey, but I'm hoping this means I don't need a new transmission any time soon.

Anyone have an opinion on this?

Thanks,
Tim
Reply With Quote
  #8  
Old 04-07-2004, 10:10 PM
itb76's Avatar
2 Kings 9:20
 
Join Date: Dec 2002
Location: Whitehall, Michigan
Posts: 259
How was the transmission two quarts down if there are no leaks?
__________________
Lenny

There are only three sports: bullfighting, motor racing and mountaineering; all the rest are merely games. --Ernest Hemingway

'10 GL550/'04 BMW 545/'99 BMW 323/'98 ML320/'87 VW GTI (race)
Reply With Quote
  #9  
Old 04-08-2004, 09:18 AM
Q Q is offline
Registered User
 
Join Date: Aug 2000
Posts: 839
Magic.
Reply With Quote
  #10  
Old 04-09-2004, 07:54 AM
Registered User
 
Join Date: Feb 2004
Location: sunrise, fl
Posts: 82
What do they mean by "Readapted transmission after top off fluid"?

Thanks,

Rene
Reply With Quote
  #11  
Old 04-09-2004, 01:10 PM
Registered User
 
Join Date: Oct 2003
Location: San Jose, CA
Posts: 19
My understanding is it has something to do with modifying the computer settings, but maybe Gilly or someone else who's technical can give you more info.
Reply With Quote
  #12  
Old 06-23-2004, 11:34 PM
arkie's Avatar
Frequent lurker
 
Join Date: Sep 2003
Location: Marion, Arkansas (near Memphis, TN)
Posts: 241
Most likely means they took it out for a test drive

The MB five-speed auto is computer-controlled adaptive, meaning it adapts its shift points to your driving automatically. Its pretty good too. It keeps it from pointless upshifting in stop-and-go driving. I do believe it costs your fuel mileage around town, though.
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 04:49 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