Go Back   United Bimmer Community - BMW Forum > UnitedBimmer- Model Categories > 5-Series > E12, E28, E34, E39, E60
FAQ Members List Calendar Advertise With Us Mark Forums Read

E12, E28, E34, E39, E60 General discussion and technical help for all year 5 series cars.

Reply
 
Thread Tools
Old 09-21-2010, 04:51 PM   #1
safcnz

Name: safcnz
Title: United Newb
Status: Offline
Join Date: Sep 2010
Location: new zealand
User not setup in Rate My Car.
Click here to set it up.
Your Ride: 1993 540ia 1990 535i
540ia transmission problem

dont know if it is the transmission or not but it starts fine, idles a bit low though. When I go to shift it into drive or reverse the car stops any ideas please
  Reply With Quote
Old 09-26-2010, 07:03 AM   #2
threequarterthrottle
 
threequarterthrottle's Avatar

Name: threequarterthrottle
Title: United Newb
Status: Offline
Join Date: Sep 2010
Location: West Virginia, USA
User not setup in Rate My Car.
Click here to set it up.
Your Ride: '89 535i
so assuming it's not a low idle problem and it's quitting because of the normal load of the trans, the problem would almost have to be in the torque. whether the lockup clutch, or a failure causing it to bind, that's the only thing that's turning when you're stopped at idle in gear.

If that tranny works like most I've fooled with(heavy equipment, mostly), the input shaft spins freely in park/neutral(no oil pressure on any clutch packs). This would allow the TC to spin as one unit, as it does in lockup mode.

When you engage the clutches for a gear, this locks up parts of the planetary gearsets, thus creating a solid connection through the gearsets. When stopped, the impeller of your torque turns with the crankshaft, and your rotor stays with your trans. input shaft(which spins freely in P/N). If your torque is locked up, it could kill the engine when you put it in gear. However, it should feel harsh when it does.

So if you could get the car rolling 5-10 mph, or perhaps VERY SECURELY raise the drive wheels, and put it in gear then, you might be able to try it. Do that, then hold the brake and stop the wheels...if the trans is causing the engine to quit you should be able to listen and tell. Hope this helps, anyone feel free to correct me if I'm wrong.
  Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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 Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
E36 Transmission Stuck in 3rd gear thorntoncg E36 10 02-22-2013 09:48 AM
e34 1994 540i - transmission problem? Help aj77 E12, E28, E34, E39, E60 6 08-11-2011 07:14 AM
'95 E34 540 - auto trans speed sensor control - shifting problem trading10 E12, E28, E34, E39, E60 9 11-04-2010 09:02 PM
transmission will not upshift raedalwan E46 4 06-24-2010 05:24 PM
e36 convert problem Butcher E36 3 09-07-2007 05:24 PM


All times are GMT -5. The time now is 10:09 AM.

A vBSkinworks Design

 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright © 2005-2013 UnitedBimmer.com