• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Egr valve transmission slips?

  • Thread starter Thread starter spock2001us
  • Start date Start date Nov 9, 2010
S

spock2001us

Member
Aug 23, 2005
143
0
16
Nov 9, 2010
#1
  • Nov 9, 2010
  • #1
OK....my DD is a 1993 Mercury Marquis....gets me to work and back.

Car runs great it is auto trans.....at highway speeds, once in a while it seems to slip in and out of gear....like the engine will rev and clearly it is slipping, but as soon as I take my foot off the gas it goes back to normal. It can go weeks without doing it, then it will suddenly do it several times over 10 mins, then not do it again. Very frustrating and if I have to replace the trans, I am taking it to the junk yard.

A friend mentioned EGR valve, which is kinda funny cause I have had an EGR code for a couple of years, but I though that was only emission crap. He said he replaced it in his older car and the transmission slip went away, said it has to do with vacuum.

Anyway......any thoughts on what I described? Thanks
 
S

soonerkid

New Member
Oct 23, 2005
10
0
1
Nov 14, 2010
#2
  • Nov 14, 2010
  • #2
Does your tach bounce around like this? YouTube - 1995 Mustang RPM issue

This is what mine does and its not the EGR.

However, when I remove the EGR vacuum line and plug it, it all goes away. Temporary fix though cuz the computer is really mad about me plugging that line.
 
You must log in or register to reply here.

Similar threads

S
Help with window and possible engine
  • StefRena22
  • Jun 12, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
19
Views
882
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 21, 2025
Willybill32
Removing speedo cable from the VSS
  • 91AOD5.0LX
  • Mar 25, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
831
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 25, 2026
91AOD5.0LX
0
V6 to V8 Swap info
  • 02_2v_Curtis
  • Jan 11, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
694
1996 - 2004 SN95 Mustang -General/Talk- Jan 11, 2026
02_2v_Curtis
0
Y
2004 Mustang GT AUTO (4R70W) Grinding noise when going in R or Drive does it as I put it into park too
  • yellowandblack
  • Dec 12, 2024
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
312
1996 - 2004 SN95 Mustang -General/Talk- Dec 21, 2024
89ripper
A
need help and advise
  • amps1956
  • Oct 14, 2025
  • Other Auto Tech
Replies
16
Views
649
Other Auto Tech Oct 21, 2025
Mcmahst
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech
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?