• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Speed Sensor

  • Thread starter Thread starter rotorhead22
  • Start date Start date Oct 24, 2021

rotorhead22

Active Member
Dec 17, 2020
175
89
38
Wesley Chapel, Florida
Oct 24, 2021
#1
  • Oct 24, 2021
  • #1
Is the speed sensor required for anything other than cruise control? My new speed trans adapter on the right doesn’t have a connection for that plug
 

Attachments

  • 3FD0CA11-ACE8-413A-AA2E-A8DC25CE2093.webp
    213.4 KB · Views: 146

KRUISR

10 Year Member
Apr 16, 2015
1,858
989
143
Oct 24, 2021
#2
  • Oct 24, 2021
  • #2
Not 100% sure, but I think the auto computer does use the signal for adjusting idle as you coast to a stop.
 

Potomus Pete

I'm still waiting for the fully nude shots
5 Year Member
Mar 7, 2019
3,336
1,236
153
Sarasota Florida
Oct 24, 2021
#3
  • Oct 24, 2021
  • #3
Mine broke during a trans. change, and I could not find the same one anywhere. No cruise control. and have never had a problem. 89/5 speed. I could not find the same one, and I tried for a year.
 

OldManRiver

Active Member
Feb 14, 2015
238
131
53
Central Wisconsin
Oct 24, 2021
#4
  • Oct 24, 2021
  • #4
Something other than this?
https://lmr.com/item/LRS-9731BB/mustang-speedo-sensor-hardware-kit-83-93
I believe that NPD has NOS available for only $160.
 

Dan02gt

mazing how much gas smell came from that tiny hole
20+ Year Stangneter
Mar 2, 2003
909
415
113
Greenville, NC
Oct 24, 2021
#5
  • Oct 24, 2021
  • #5
The computer uses the input from the speed sensor for the dashpots anti-stall strategy to help prevent the car from cutting off when you are coming to a stop or idling slow in a parking lot. I would recommend sourcing the proper part.
 
Reactions: General karthief

Mstng93SSP

You have a nice rear end there Dave.
15 Year Member
Nov 29, 1999
2,993
3,500
184
Mililani, Hawaii
Oct 24, 2021
#6
  • Oct 24, 2021
  • #6
Can't beat that LMR replacement one for $30.
 
Reactions: General karthief

KRUISR

10 Year Member
Apr 16, 2015
1,858
989
143
Oct 24, 2021
#7
  • Oct 24, 2021
  • #7
Mstng93SSP said:
Can't beat that LMR replacement one for $30.
Click to expand...
Rockauto, not even close...

 
Reactions: General karthief

OldManRiver

Active Member
Feb 14, 2015
238
131
53
Central Wisconsin
Oct 24, 2021
#8
  • Oct 24, 2021
  • #8
Pete said he couldn't find one to save his life,LMR was just an example to see if it was same part he was speaking of.
Plus I usually add a T shirt to any LMR order IF it gets me to qualify for free shipping.Adding $12 shipping to a $15 Rock Auto order is a no go for me unless I have much more to order.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,301
18,007
224
Massachusetts
Oct 24, 2021
#9
  • Oct 24, 2021
  • #9
Yes, on the 89+ Mustangs the ECU is monitoring the signal on both auto/manual ecus as it adjusts the idle strategy as your roll to a stop.

Without it, some cars will stall out. Even without cruise control, it should be retained and the computer will spit out a VSS codes if it’s failed


On 86-88 speed density Mustangs it’s only used for cruise control. Non-cruise 86-88 don’t even come woth one installed. You need to add one if converting one of these to MaF
 
Reactions: General karthief

KRUISR

10 Year Member
Apr 16, 2015
1,858
989
143
Oct 25, 2021
#10
  • Oct 25, 2021
  • #10
OldManRiver said:
Plus I usually add a T shirt to any LMR order IF it gets me to qualify for free shipping.Adding $12 shipping to a $15 Rock Auto order is a no go for me unless I have much more to order.
Click to expand...
So you would pay $20 for T shirt on top of $30 for the part to get free shipping and consider $27 for the part you need delivered a no go???
 
Reactions: Kid wita 5oh

OldManRiver

Active Member
Feb 14, 2015
238
131
53
Central Wisconsin
Oct 25, 2021
#11
  • Oct 25, 2021
  • #11
Yup.
 

rotorhead22

Active Member
Dec 17, 2020
175
89
38
Wesley Chapel, Florida
Oct 27, 2021
#12
  • Oct 27, 2021
  • #12
Well I will have to fly it and watch it because the gauge company stated that they have had nobody inquire about that plug
 

Willybill32

But at least it's tight!
5 Year Member
Jul 16, 2019
635
357
83
Lexington, KY
Oct 30, 2021
#13
  • Oct 30, 2021
  • #13
Mustang5L5 said:
Yes, on the 89+ Mustangs the ECU is monitoring the signal on both auto/manual ecus as it adjusts the idle strategy as your roll to a stop.

Without it, some cars will stall out. Even without cruise control, it should be retained and the computer will spit out a VSS codes if it’s failed


On 86-88 speed density Mustangs it’s only used for cruise control. Non-cruise 86-88 don’t even come woth one installed. You need to add one if converting one of these to MaF
Click to expand...
I converted my ‘86 non-cruise car to MAF years ago. I did not add the VSS and have had no issues.
 
Reactions: rotorhead22
You must log in or register to reply here.

Similar threads

M
Idle control problems
  • miser143
  • Aug 28, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
118
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 29, 2026
DadLife0724
J
Lack of power on acceleration
  • jameshernandez
  • Aug 30, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
3
Views
136
1996 - 2004 SN95 Mustang -General/Talk- Sep 6, 2026
jameshernandez
J
A
ECT sensor wires gone?? HELP
  • archer886
  • Oct 6, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
5
Views
439
1996 - 2004 SN95 Mustang -General/Talk- Oct 8, 2025
Mustang5L5
S
Fox '87 GT can't get to stay running
  • spilly
  • Mar 29, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
984
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 20, 2026
spilly
S
J
Intake
  • James S
  • Jul 10, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
10
Views
254
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 12, 2026
James S
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?