• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

AOD transmission shutter/vibration

  • Thread starter Thread starter mode101
  • Start date Start date Oct 10, 2006
M

mode101

Member
Apr 13, 2003
202
0
16
Dallas, TX
Oct 10, 2006
#1
  • Oct 10, 2006
  • #1
My 02 is having a really weird tranny problem, which I will try to describe.

Starting off easy from a stop light, I will accelerate to about 35-40. When I get to around 40, and the tranny shifts up to a higher gear, the tranny will start to shutter shake and vibrate (the whole car) as it goes into gear. While driving at that speed, if I want to accelerate and give it a little gas, it will do the same thing only worse - more shakes and vibration as it drops into a lower gear. It seems to do it worse when the tranny has warmed up. It will also do it on the highway at passing speeds. As the transmission is going into the highest gear, it will do it. It does it on the last shift of an acceleration as it goes into the cruising gear.

It just started doing this about a month or two ago. At first it was only doing it every now and then, now it does it all the time, and its getting worse. Automatic 02 GT vert. 42k on the clock. Car runs perfect otherwise.

Can anyone please shed some light on this.
 
C

clockstopper

New Member
Aug 29, 2006
11
0
0
Ohio
Oct 10, 2006
#2
  • Oct 10, 2006
  • #2
cant help ya with a fix, but my 96 gt has a similar prob, but only happens from 30 - 35 then stops... like a shudder vibrate kinda thing... i'd like some info as well
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Oct 11, 2006
#3
  • Oct 11, 2006
  • #3
there is several different things this can be.. it can either be a engine driveability concern or it could be a trans problem.

many times a shuddering concern in high gears whne the tourqe converter is locked is a engine misfire. the engine is under more load durrng light acceleration with the converter locked, anytime you have low rpm's and high load that can cause secondary ignition related misfires to be easier to notice. If this is your problem then it could be as simple as spark plugs.

If it's in the transmission it could be many things, a internal leak that causes a presure loss such as a cracked piston cup could also be converter chatter. To be honest I would need to drive the car to get a better idea of what is going on.
 
S

SeanD1111

New Member
Sep 16, 2004
52
0
0
Texas
Oct 11, 2006
#4
  • Oct 11, 2006
  • #4
kinda sounds like TC shudder. Have you ever had the tranny serviced (flushed the fluids)?
 
M

mode101

Member
Apr 13, 2003
202
0
16
Dallas, TX
Oct 11, 2006
#5
  • Oct 11, 2006
  • #5
Service

I bought the car used, with about 25k on the clock, it has around 42k now. I have done basic maintenance. Oil changes (m1 5w20) every 3k, I have changed the coolant once.

I have not had the tranny fluid flushed and filter changed yet. I did not know if it would help since the problem came on so suddenly. I was actually holding off on changing it since I was going to take it in, I didnt want to just waste that money. I fugured they probably would have to change the tranny fluid if they service it anyway.

It is gradually getting worse. Today a new noise, from a stop it made like a squeel type noise, which kind of sounded like a clutch slipping.

 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Oct 12, 2006
#6
  • Oct 12, 2006
  • #6
The only way all the tranny fluid will be changed when they work on the trans is if they rebuild it, or sell you a trans flush.

you may want to try a trans flush. look for a place that offers a bg trans flush and will let you watch them do it. We have this machine at my work and I have cleared up a few problems like this with the flush.. JUST MAKE SURE YOU CAN WATCH THEM DO THE FLUSH..

MANY MANY techs don't do the flush and just say they did it. or they change the fluid but don;t run the chemicals through the trans first. You have to make sure they add the cleaner then drive the car through all the gears either on the road or on the lift.. If this is not done then it will be a waste of your money.

Do not trust any shop I don't car how well you think you know them.
 
M

mode101

Member
Apr 13, 2003
202
0
16
Dallas, TX
Oct 12, 2006
#7
  • Oct 12, 2006
  • #7
Thanks for the info Mike
 

Gearbanger 101

Straight Outta Locash
20+ Year Stangneter
Aug 10, 2002
9,457
1,377
234
Ontario, Canada
Oct 12, 2006
#8
  • Oct 12, 2006
  • #8
Installing an good plate style external transmission cooler along with the flush/fluid change is a great way to cure the dreaded torque converter shudder as well. Superheating the fluid in stop and go traffic is a sure fire way to degrade it in a hurry and is often what causes this. If it was an earlier mode (pre-99) 4R70W, there are a host of late model upgrades you can do to cure it, but since it's a late model trans, the tranny cooler would be my first move. I think installing one should be a manditory modification anyway, whether your'e having problems or not.
 
Reactions: 1stGtTho
1

1stGtTho

New Member
Jun 24, 2015
1
0
1
Jun 24, 2015
#9
  • Jun 24, 2015
  • #9
I have the 4R70W in my 95 GT. I just replace the shifter control solenoids and after running all the gears I start driving and once the engine heats up it starts to shake when shifting gears what do you suggest
 
You must log in or register to reply here.

Similar threads

A
2001 Mustang GT, scorched metal smell and noise from trans/diff?
  • AndyE2255
  • Dec 1, 2025
  • SN95 4.6L Mustang Tech
Replies
4
Views
431
SN95 4.6L Mustang Tech Dec 28, 2025
gkomo
A
Rough idle - cylinder 1 and 6 misfire HELP
  • austindavies935
  • Jul 24, 2025
  • SN95 4.6L Mustang Tech
Replies
12
Views
670
SN95 4.6L Mustang Tech Jul 24, 2025
gkomo
Mustang II 4 cyl gear hunting and possibly messed up vacuum system
  • oesterreicher
  • May 31, 2026
  • 1974 - 1978 Mustang II Talk & Tech
Replies
11
Views
242
1974 - 1978 Mustang II Talk & Tech Jun 14, 2026
manicmechanic007
S
Drivetrain 8.8 Pinion and 302 rear main seal leaks after replacing. 93 5.0 with t-5
  • Steigy4827
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
10
Views
637
Fox 5.0 Mustang Tech Apr 1, 2026
Steigy4827
S
U
8 Years of Vibration leading to engine knock?
  • UpgradeXP
  • Apr 14, 2025
  • SN95 V6 Mustang Tech
Replies
3
Views
439
SN95 V6 Mustang Tech Apr 14, 2025
Noobz347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang 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?