Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
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
  #11  
Old 10-22-2019, 10:25 PM
Member
 
Join Date: Mar 2007
Location: Seattle, WA
Posts: 209
e39_touring is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
https://youtu.be/eOuNNG_mD6Q

Unless the X5 doesn't work like every other modern car, it will get the speed from the vss on the output shaft of the transmission.

24357507706 is the part number for my car, others may be different since it attaches to the transmission.

Prove me wrong. All info I can find online points to the speedometer gets the reading from the output of the transmission. (like most cars).

Point made: one of my xo buddies has a defective abs module and has no wheel speeds at all yet his speedo still works.
Interesting, the only electrical part on my transmission is the backup light switch. I guess the automatics are different, and I spoke out of school since I've only looked into it for the manual tranny (mine's the pre-LCI 5 spd).
__________________
2012 xDrive35d
2001 BMW X5 3.0i 5MT
and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80
Block Tester
Reply With Quote

Sponsored Links

  #12  
Old 10-22-2019, 11:27 PM
Happy's Avatar
Member
 
Join Date: Jan 2013
Location: Golden Coast/Lake Houston
Posts: 192
Happy is on a distinguished road
Quote:
Originally Posted by bcredliner View Post
A couple of years ago I purchased a set of lower ratio 4.10 diffs out of a 3.0 to replace the 3.91 stock ratios. Result will be that at the same speed RPMs will be higher than the stock ratio but it will reduce 0-X times. My interest is getting to 60 in less time.


Have you thought this through?
Reply With Quote
  #13  
Old 10-22-2019, 11:28 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,791
andrewwynn is on a distinguished road
I don't know where the sensor would be on manual shift, I would guess differential or transfer case


Sent from my iPhone using Tapatalk Pro
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #14  
Old 10-23-2019, 01:23 AM
Member
 
Join Date: Mar 2007
Location: Seattle, WA
Posts: 209
e39_touring is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
I don't know where the sensor would be on manual shift, I would guess differential or transfer case


Sent from my iPhone using Tapatalk Pro
No electronics on the TC or differentials, either. It definitely picks up vehicle speed from a wheel sensor on my car.

I just found this from a factory training document I had on the E53/M54 from when the X5 first came out:

"Road speed is input to the ECM for cruise control as well as DSC regulation. The vehicle speed signal for normal engine operation is supplied from the DSC module (right rear wheel speed sensor). The road speed signal for cruise control is supplied from the DSC module. This is an average taken from both front wheel speed sensors, supplied via the CAN bus."

This document wasn't specific to the manual transmission vehicles, but I'm surprised they would handle something as basic as speed input in different ways auto vs. manual. In fact, I bet the speed sensor on your automatic is only used for trans diagnostics (i.e. monitor input shaft speed vs. output shaft speed to detect slippage).
__________________
2012 xDrive35d
2001 BMW X5 3.0i 5MT
and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80
Block Tester
Reply With Quote
  #15  
Old 10-23-2019, 08:59 AM
Happy's Avatar
Member
 
Join Date: Jan 2013
Location: Golden Coast/Lake Houston
Posts: 192
Happy is on a distinguished road
Are the diffs open on a 4.6iS?
Reply With Quote
  #16  
Old 10-23-2019, 10:33 AM
bcredliner's Avatar
.1 decrease 0-60 time = $1000 & DIY
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 6,982
bcredliner is on a distinguished road
Quote:
Originally Posted by Attacking Mid View Post
If you change the rear diff ratio, wouldn't you have to change the front diff ratio similarly to avoid TC wear?

AM.
Yes, changing both.
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
Reply With Quote
  #17  
Old 10-23-2019, 10:59 AM
Member
 
Join Date: Mar 2007
Location: Seattle, WA
Posts: 209
e39_touring is on a distinguished road
Quote:
Originally Posted by Happy View Post
Are the diffs open on a 4.6iS?
Yes, front & rear diffs are open on all e53.
__________________
2012 xDrive35d
2001 BMW X5 3.0i 5MT
and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80
Block Tester
Reply With Quote
  #18  
Old 10-23-2019, 11:22 AM
bcredliner's Avatar
.1 decrease 0-60 time = $1000 & DIY
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 6,982
bcredliner is on a distinguished road
Quote:
Originally Posted by Happy View Post
Are the diffs open on a 4.6iS?
The 4.6 front to rear is permanent with 38% of power going to the front wheels and 62% to the rear. The diffs are 'open' from the standpoint that if a tire loses traction the ABS or DSC will adjust accordingly.

In the 'old days' diffs when there was no ABS or DSC, diffs could be open which meant all power went to one rear wheel all the time. Positraction corrected that issue with power to both rear wheels. Positraction would allow different wheel speeds such as is needed when going around a corner or curve. Racers often welded the diff so that the both rear tires were always getting the power. Locked diffs issue was they turned at the same rate all the time which was really not a good idea for a daily driver.
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
Reply With Quote
  #19  
Old 10-23-2019, 11:42 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,791
andrewwynn is on a distinguished road
The limited slip was good enough on my z28 that it would spin the inside wheel when taking tight turns if there was sand on the ground. Took a while to figure out the weird noise
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #20  
Old 10-23-2019, 12:12 PM
Happy's Avatar
Member
 
Join Date: Jan 2013
Location: Golden Coast/Lake Houston
Posts: 192
Happy is on a distinguished road
The thing that would concern me most is the transmission.

You have a 2002, so if your transfer case is the same as mine you should be good there as long as both diffs are installed.

The automatic transmission has programming for shifting. If the ratios are changed, what effect will that have on the trans? Also, if the trans does accept the swap, but changes the shifting due to rpm increase, what effect would that have on a trans that has performed a certain way for its entire life?

You also stated, for improved 0-60. So I am assuming that at times the truck will be under full throttle, will the drive line be able to handle the changes to the original formula?
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 03:20 PM.
vBulletin, Copyright 2019, 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.