Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-29-2019, 01:15 AM
Member
 
Join Date: Jul 2019
Location: Long Island, NY
Posts: 60
Davelaz23 is on a distinguished road
Help before I dive in...

Hey guys, I have a 2002 4.6is with 90k miles on it. Engine runs great but I do have the hard 2-1 downshift unless I drive it in sport. I noticed the other day it was whining (supercharger sound) at low speed acceleration. It doesn’t whine in neutral or park, so unfortunately its looking like I might have to do a TC replace/rebuild. However....I have noticed on a few occasions my battery light came on for a sec and then went away. Is it possible at all that my alternator could be going and the whining is coming from that? Hopefully it’s not just wishful thinking! I also need to change my fan belts, so I’m just wondering if I definitely have to change my TC? I have BC coilovers, axles, and rear subframe bushings going in next week (hoping it dissolves the 2-1 downshift issue), and if I have to do the TC I’ll do it while the car is up. Also, I have no trans shifting issues or codes that come up. Thoughts?
Reply With Quote

Sponsored Links

  #2  
Old 08-29-2019, 05:57 AM
Auto Parts Guy's Avatar
Member
 
Join Date: Aug 2019
Location: Greenville, SC
Posts: 128
Auto Parts Guy is on a distinguished road
Low voltage can make all sorts of modules do crazy things, including the EGS. Did you check the battery voltage while the car is off and while running?
Reply With Quote
  #3  
Old 08-29-2019, 08:14 AM
Emory39's Avatar
Member
 
Join Date: Nov 2014
Location: Colorado Springs CO
Posts: 698
Emory39 is on a distinguished road
I would check vehicle voltage and if possible check for ATF fluid level.
__________________
5G Ford Ranger Lariat 2022

E36/7 Z3 97 1.9 New project

E53 X5 4.6is 02 OFF to Bring a trailer soon
Land Rover Disco 2 03 - sold
Kawasaki Z900B 17- sold
E53 X5 3.0 5M/T 01-sold-again
E53 X5 4.4 05-the beast a 4.8tu swap. at 150k -SOLD

E83 X3 3.0-the wife's - sold
R56 Mini Cooper S 07-sold
E36 M3 97 - sold
E36 M3 98-sold
E39 528i 00-sold
E30 318i 91-sold
E36 M3 95-sold

https://www.youtube.com/channel/UCcI..._as=subscriber
Reply With Quote
  #4  
Old 08-29-2019, 11:43 AM
Member
 
Join Date: Jul 2019
Location: Long Island, NY
Posts: 60
Davelaz23 is on a distinguished road
Quote:
Originally Posted by Auto Parts Guy View Post
Low voltage can make all sorts of modules do crazy things, including the EGS. Did you check the battery voltage while the car is off and while running?
You’re right I need to check the voltage, what numbers am I wanting to see while running and while off?
Reply With Quote
  #5  
Old 08-29-2019, 11:45 AM
Member
 
Join Date: Jul 2019
Location: Long Island, NY
Posts: 60
Davelaz23 is on a distinguished road
Quote:
Originally Posted by Emory39 View Post
I would check vehicle voltage and if possible check for ATF fluid level.
Yeah I’m thinking about doing a tranny service on it. Actually, I’m definitely gonna do it
Reply With Quote
  #6  
Old 08-29-2019, 02:08 PM
Liamk's Avatar
Member
 
Join Date: Nov 2018
Location: Halifax, Uk
Posts: 39
Liamk is on a distinguished road
A transmission service definitely helped with my 2-1 downshift although did not fully cure it but it is more than good enough to live with now. My battery light started to glow on idle when the alternator was on its way out, but would go out immediately if you upped the Revs anything from tick over. With the old alternator I regularly got the transmission failsafe warning as well as self level suspension inactive, but with a new alternator and decent battery everything is fine (for now ha!).
Reply With Quote
  #7  
Old 08-29-2019, 07:42 PM
Member
 
Join Date: Jul 2019
Location: Long Island, NY
Posts: 60
Davelaz23 is on a distinguished road
Quote:
Originally Posted by Liamk View Post
A transmission service definitely helped with my 2-1 downshift although did not fully cure it but it is more than good enough to live with now. My battery light started to glow on idle when the alternator was on its way out, but would go out immediately if you upped the Revs anything from tick over. With the old alternator I regularly got the transmission failsafe warning as well as self level suspension inactive, but with a new alternator and decent battery everything is fine (for now ha!).
Checking voltage tomorrow at the parts store, I can’t find my tester I drove it around the block today and noticed it whined in only first gear. After shifting into second, it went away. Either that or it got much quieter (hard to notice since with an upgraded exhaust it drowns a lot out). I’m hoping numbers come back wonky, leading me to change my alternator and fixing it. If not I’ll do a tranny service (which I’m doing anyways) to see if it fixes it. It only does whine though, when in sport mode it shifts and feel great. I’ll post voltage numbers tomorrow
Reply With Quote
  #8  
Old 08-29-2019, 09:06 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
You can monitor voltage real-time with the OBC hidden menu


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 09:35 AM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.