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 03-26-2008, 05:23 PM
Registered User
 
Join Date: Mar 2008
Location: egg harbor township nj
Posts: 2
91 300e automatic transmission issues

my 91 300e has 252k+ mi, and is experiencing some transmission problems. i have not yet had it checked out, and am driving it as limited as possible until i can do so. i was wondering if anyone had similar problems and could help me out with possible suggestions.

when the car is in park, it the rpms rev very high, up to 2,000rpms. when you put the car into gear (drive, reverse etc) it goes to a normal rpm. often times, when the car is put into gear, it is accompanied by an audible clunk.

when you are driving, the rpms will rev very high, up to 4,000-5,000 rpms. most of the time, it will then drop down to a normal rpm and shift to the next gear. but sometimes, you will have to hit the gas hard and then let off kind of forcing it to shift. this usually happens going in to like 2nd or 3rd.

sometimes when you are driving, and the car will be getting ready to shift it will rev high for a second, then like slowdown (or something im not sure) and then shift.

when driving long distance at high speed (only happened once, im afraid to take it far or too fast ) the car will not shift into higher gears, and then it overheats. what was happening was, whatever speed i was going, those were the rpms (65mph=6500rpms, 45mph=4500rpms) i really took it easy, and didnt go any faster than 45 or 50, as i had to get home and was 45 mins away.

so, if anyone has any suggestions, i would be very grateful!
Reply With Quote
  #2  
Old 03-26-2008, 05:48 PM
Registered User
 
Join Date: Jun 2007
Location: Topeka, Ks
Posts: 203
It sounds like the car may have several separate issues.

Has the head gasket ever been replaced? This engine is well known for leaky head gaskets. This can make the car overheat quickly. Or, you may just need a thermostat or your radiator may be plugged. Have you checked that you have enough coolant? Missing coolant can be a sign of head gasket problems.

Sounds like you have an engine idle problem as well. A mechanic can adjust this for you.

On the transmission, you may have a vacuum leak or something more serious. Fist thing to do on this is to pull the dipstick and see what color the transmission fluid is. Does it smell burnt? You can try changing the fluid/filter (easy for a do it yourself'er) as a starting point. It may be low of fluid, so check that first.

Post what you find, and we'll see if anybody can help you...

-GH
__________________
For Now:
1992 Mercedes Benz 500SL
1998 BMW 528i
2003 Honda Element
2002 CBR600F4i
1977 Coachmen Motor Home
Reply With Quote
  #3  
Old 03-26-2008, 05:51 PM
Registered User
 
Join Date: Jan 2008
Location: Redondo Beach, CA
Posts: 188
I don't know why your car would "idle" at 2K rpm in park, but that doesn't sound like a transmission problem. A "clunk" going into gear from a high idle is probably to be expected.

Have you checked your transmission fluid level? It would be a good place to start.
__________________
1993 190E 2.6 135k
1989 Ford Thunderbird SC 5 Spd 79K
Reply With Quote
  #4  
Old 03-26-2008, 08:11 PM
Registered User
 
Join Date: Mar 2008
Location: egg harbor township nj
Posts: 2
ok well my husband said that he is pretty sure the head gasket needs to be replaced. so im sure that will happen soon. as far as the fluid level, that gets checked regularly as there is a very slight leak. it is still red and doesnt smell burnt. we will change the filter and see what happens from there.
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 11:09 AM.


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