Question about 1997 Mercury Grand Marquis

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I'm getting a late 3-2 down shift with a vibration when it finally does. My question is will the trans control solenoid not working properly cause this.

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Yes the trans solenoid can and has in many of that product line however,with a vibration along with the poor shift I think there is more internal problems.

Posted on Aug 05, 2010

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1 Answer

Tranny wont shift gears what could cause that


There are a variety of things that can cause a transmission not to shift. Let's start with the cheapest and work our way up. Vacuum leaks can sometimes cause a delayed shift or a no shift. Check all vacuum lines that go to the trans. Not enough trans fluid or very dirty trans filter can cause a no shift. Shift solenoids which are located inside the trans and last, the trans has finally burned through the clutches and will have to be completely rebuilt. Should be one of these and if you're lucky, it'll be one of the first two.

Sep 24, 2014 | Cars & Trucks

1 Answer

My 1995 buick lesabre electronic transmission- it shifts at the wrong speeds and sometimes will not shift into high gear on the highway, but sometimes it will work. and sometimes it loses gear on th


First off, have you changed your trans fluid lately. sounds like you need a trans flush. when you drop the trans pan and replace the filter and fluid you only get 3 to 4 quarts of transfluid. your trans holdt 12 to 15 quarts. so have it flushed completely cost $80 tp $120 but beats buying a new or rebuilt trans. always make sure you have the right amount of trans fluid. underfilling will cause lose of pressure and not shift properly. over filling a trans will cause over pressure and cause worse problems.

Apr 05, 2014 | 1995 Buick LeSabre

1 Answer

Transmission not shifting into 4th gear


Dirty Shift Solenoids

Have to Google your trans unit or model
& see what the inside looks like, as far as
shift control items go

It may not be going into converter lock-up
either,that is some high rpm that will overheat it
also & ruin it for good

Mar 07, 2013 | Cars & Trucks

1 Answer

What does the code po753 refer to


Symptom:

P-0753 TRANS 3-4 SHIFT SOLENOID/TRANS RELAY CIRCUITS

When Monitored and Set Condition:

P-0753 TRANS 3-4 SHIFT SOLENOID/TRANS RELAY CIRCUITS

When Monitored: Continuously with the key on.

Set Condition: This code is set if the voltage detected on the 3-4 Shift Solenoid Control

Circuit at the PCM is different than the expected voltage.

POSSIBLE CAUSES

FUSED B(+) FEED TO THE TRANS CONTROL RELAY OPEN

3-4 SOLENOID WIRING HARNESS INTERMITTENT DEF

3-4 SOLENOID WIRING HARNESS OBSERVABLY DEF

SHIFT SOLENOID CONTROL CIRCUIT OPEN

SHIFT SOLENOID CONTROL CIRCUIT SHORT TO GROUND

SOLENOID AND HARNESS DEF (SOLENOID CONTROL CKT)

TRANSMISSION RELAY OUTPUT CIRCUIT OPEN

TRANSMISSION RELAY OUTPUT CIRCUIT SHORTED TO GND

PCM DEF (3-4 SOLENOID/TRANSMISSION)

PCM DEF (TRANS 3-4 SOL/TRANS RLY CKT)

POWERTRAIN CONTROL MODULE DEFECTIVE

POWERTRAIN CONTROL MODULE DEFECTIVE

POWERTRAIN CONTROL MODULE DEFECTIVE

SOLENOID AND HARNESS DEF (SOLENOID PACK CONN)

TEST COMPLETE
TRANSMISSION CONTROL RELAY DEFECTIVE

Feb 03, 2012 | 1999 Dodge Dakota

1 Answer

How to fix open or shorted relay circuit 3-4 shift solenoid relay condition on 2000 jeep cherokee


Check this TSB...
Set Condition: This code is set if the voltage detected on the 3-4 Shift Solenoid Control
Circuit at the PCM is difference than the expected voltage.

POSSIBLE CAUSES
FUSED B(+) FEED TO TRANS CONTROL RELAY OPEN
TRANS CONTROL RELAY
3-4 SOLENOID CONTROL CIRCUIT OPEN
3-4 SOLENOID WIRING HARNESS INTERMITTENT
3-4 SOLENOID WIRING HARNESS
SHIFT SOLENOID CONTROL CIRCUIT SHORT TO GROUND
SOLENOID AND HARNESS (SOLENOID CONTROL CKT)
SOLENOID AND HARNESS (SOLENOID PACK CONN)
TRANS RELAY OUTPUT CIRCUIT OPEN
TRANS RELAY OUTPUT CIRCUIT SHORTED TO GROUND
PCM (3-4 SOL CONTROL CKT)

PCM (CODE SET)
POWERTRAIN CONTROL MODULE

TEST ACTION APPLICABILITY
1 Key On.
With the DRB, read trouble codes.
Is the Trans 12 volt Supply Relay Control Circuit code set?

All
Yes - Refer to symptom P-1765 TRANS 12 VOLT SUPPLY RELAY CONTROL CIRCUIT in the TRANSMISSION category.
No - Go To 2

2 Key On.
With the DRB, read trouble codes.
Is the DTC Specific Good Trip displayed and equal to zero?
All
Yes - Go To 3
No - Go To 17
555 TRANSMISSION

TEST ACTION APPLICABILITY
3 The code is present at this time.
Key On.
Check and record Freeze Frame data to determine the conditions when the code was set before disconnecting the PCM Connectors.
Note: Freeze Frame data will be erased.
Road test Vehicle. Attain Vehicle speed of at least 50 MPH.
Push OD Switch 4 times such that Vehicle attempts to shift from 3rd to 4th and back.

Did the Vehicle shift between 3rd and 4th?
All
Yes - Go To 17
No - Go To 4

4 Key Off.
Disconnect the Trans Solenoid Pack Connector.
Note: Check connectors - Clean/repair as necessary.
Turn Key On.
With the DRB, actuate Trans Control Relay.
Using a Voltmeter, measure the voltage at the Trans Relay Output Circuit.

Does the voltage fluctuate from 0.0 volt to over 10.0 volts?
All
Yes - Go To 5
No - Go To 13

5 Key Off.
Disconnect the Trans Solenoid Pack Connector.
Disconnect the Powertrain Control Module White Connector.
Note: Check connectors - Clean/repair as necessary.
Key On.

Using a voltmeter, measure the voltage at the 3-4 Shift Solenoid Control Circuit.

Is the voltage above 10.0 volts?
All
Yes - Go To 6
No - Go To 7

6 Key Off.
Repair 3-4 Solenoid Control Circuit shorted to voltage.
Reconnect all disconnected Connectors.
Road test Vehicle. Attain Vehicle speed of at least 50 MPH.
Push OD Switch 4 times such that Vehicle attempts to shift from 4th to 3rd and back.

Did the Vehicle shift between 3rd and 4th?
All
Yes - Test Complete.
Perform Powertrain Verification Test VER-5A.

No - Replace the PCM.Perform Powertrain Verification Test VER-5A.

7 Key Off.
Disconnect the Powertrain Control Module White Connector.
Note: Check connectors - Clean/repair as necessary.
Using a Ohmmeter, measure the resistance between the 3-4 Shift Solenoid Control
Circuit at the PCM Connector and Ground (B-).
Is the resistance below 5.0 ohms?
All
Yes - Go To 8
No - Go To 9

556 TRANSMISSION
TEST ACTION APPLICABILITY

8 Key Off.
Disconnect the Trans Solenoid Pack Connector.
Disconnect the Powertrain Control Module White Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance between the 3-4 Shift Solenoid Control
Circuit at the PCM Connector and Ground.

Is the resistance below 5.0 ohms?
All
Yes - Repair the 3-4 Shift Solenoid Control Circuit shorted to ground.
Perform Powertrain Verification Test VER-5A.

No - Replace the Solenoid and Harness Assembly.
Perform Powertrain Verification Test VER-5A

9 Key Off.
Disconnect the Powertrain Control Module White Connector.
Remove the Trans Control Relay.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter measure between the Trans Control Relay Output Circuit at the

Relay and the 3-4 Solenoid Control Circuit at the PCM Connector.
Is the resistance above 40.0 ohms?
All
Yes - Go To 10
No - Go To 12

10 Key Off.
Disconnect the Powertrain Control Module White Connector.
Disconnect the Trans Solenoid Pack Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the 3-4 Solenoid Control Circuit from the PCM
Connector to the Solenoid Connector.

Is the resistance below 5.0 ohms?
All
Yes - Go To 11
No - Repair the open 3-4 Solenoid Control Circuit.

Perform Powertrain Verification Test VER-5A.

11 If there are no potential causes remaining.
View repair options.
All

Repair
Replace the Solenoid and Harness Assembly.
Perform Powertrain Verification Test VER-5A.

12 Key Off.
Disconnect the Powertrain Control Module White Connector.
Remove the Trans Control Relay.
Note: Check connectors - Clean/repair as necessary.
Using a Ohmmeter measure between the Trans Control Relay Output Circuit at the
Relay and the 3-4 Solenoid Control Circuit at the PCM Connector.

Is the resistance between 26.0 and 40.0 ohms?
All
Yes - Replace the PCM.
Perform Powertrain Verification Test VER-5A.
No - Replace the Solenoid and Harness Assembly.
Perform Powertrain Verification Test VER-5A

557 TRANSMISSION

TEST ACTION APPLICABILITY

13 Key Off.
Remove the Trans Control Relay.
Note: Check connectors - Clean/repair as necessary.
Key On.
Using a Voltmeter, measure the Fused B(+) Circuit in the Relay Connector.

Is voltage above 10.0 volts?
All
Yes - Go To 14
No - Repair the open Fused B(+) Feed to the Trans Control Relay.
Perform Powertrain Verification Test VER-5A.

14 Key Off.
Disconnect the Trans Solenoid Pack Connector.
Remove the Trans Control Relay.
Note: Check connectors - Clean/repair as necessary.
Using a Ohmmeter, measure the Trans Control Relay Output Circuit from the Relay

Connector to the Solenoid Connector.
Is the resistance above 5.0 ohms?
All
Yes - Repair the open Trans Relay Output Circuit.
Perform Powertrain Verification Test VER-5A.

No - Go To 15

15 Key Off.
Disconnect the Trans Solenoid Pack Connector.
Remove the Trans Control Relay.
Note: Check connectors - Clean/repair as necessary.
Using a Ohmmeter, measure between the Trans Control Relay Output Circuit and Ground.

Is the resistance below 5.0 ohms?
All
Yes - Repair the Trans Relay Output Circuit shorted to ground.
Perform Powertrain Verification Test VER-5A.

No - Go To 16

16 If there are no potential causes remaining.
View repair options.
All
Repair
Replace the Trans Control Relay.

Perform Powertrain Verification Test VER-5A.

17 Key On.
Check and record freeze frame data to determine the conditions when the code was set.
Erase the DTC.

Warning: This will erase the Freeze Frame data.

Attempt duplication of Freeze Frame Data to help reset the code.

Key Off.

Using the Schematic as a guide, inspect the Wiring and Connectors.

Were any problems found?
All

Yes Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No Go To 18

558 TRANSMISSION

TEST ACTION APPLICABILITY

18 Key On.
Note: Actuate the 3-4 Solenoid or the test can be done with the Engine running.
Wiggle the Wiring Harness from the Solenoid to the PCM.

Note: You are attempting to set the code.
With the DRB, read DTC's.
Does the 3-4 Solenoid Control Circuit Trouble Code appear?
All
Yes - Repair as necessary.
Perform Powertrain Verification Test VER-5A.

No - Test Complete.
Perform Powertrain Verification Test VER-5A.
559

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Dec 02, 2011 | 2000 Jeep Grand Cherokee

2 Answers

My 88 blazer won't shift out of first gear until its up to 35 to 40 mpg, its a 700 auto. Any suggestions


Check all your vacume lines for leeks.If there are no leeks then may have a bad modulater.There will be one vacume line that goes down your fire wall to your trans.Where the vacume line plugs in,this is your modulater and controls your shifting.The part runs anywhere from $10-15 for a new one and most just screw into the trans or have a fork retainer with a single bolt.This only applies on gas motors.Well good luck and hope this helps.,

Apr 21, 2010 | 1988 Chevrolet Blazer

3 Answers

Trans shifting prob n gas mileage


have the shift solenoid checked out
Auto Zone will perform a free scan of the computer to dee which one is at fault

Feb 28, 2010 | 1996 Ford F250 Crew Cab

1 Answer

2001 ESPACE 2.0L AUTO NO REVERSE HELP PLEASE


your trans has lectronic controls to operate the shifting of your trans. If there is a defect, a fault code will be stored in the computer, called a DTC. You need to have someone with a scan tool check for the fault code. It is likely a solenoid that is not working or stuck.

Get the codes first. Autozone can run the test for free on engines, maybe trans codes too. Call your local Autozone or big parts store and ask them.

----------
SECTION 307-01: Automatic Transaxle/Transmission 2001 Escape Workshop Manual
DESCRIPTION AND OPERATION Transaxle Description The CD4E automatic transaxle is a four-speed, front wheel drive automatic transaxle with electronic controls for:
  • Electronic pressure control (EPC) solenoid for shift quality.
  • Shift scheduling.
  • 3-2 shift timing.
  • Coast braking.
  • Torque converter clutch control.
The transaxle features a four element torque converter with a torque clutch and a geartrain that includes:
  • Compound planetary gearset.
  • Chain drive.
  • Planetary gearset final drive.
  • Pinion and side gear differential.
The hydraulic control system of the transaxle has five solenoids that control:
  • Shift feel, through line pressure control.
  • Shift scheduling, through shift valve positioning control.
  • Modulated application of the torque converter clutch.
  • Timing of 3-2 shifts.
  • Engine braking during coast operation.
----------------------------
Solenoid Valve Body Assembly The solenoid valve body assembly contains the transmission fluid temperature sensor (TFT) sensor, as well as five PCM controlled output devices:
  • Electronic pressure control (EPC) solenoid.
  • Shift solenoid A (SSA).
  • Shift solenoid B (SSB).
  • 3-2 timing/coast clutch solenoid (3-2 T/CCS).
  • Torque converter clutch (TCC) solenoid.
---------------------------------
You may need your PCM, Powertrain Control Module reflashed by a Ford Dealer.
Try disconnecting your battery for 1/2 hour and then reconnect and see what happens. It will run a little rough and shfit hard until it relearns your engine/trans characteristics.
Let us know results of tests and DTC codes if you get them.

May 04, 2009 | Renault Sportwagon Cars & Trucks

1 Answer

4L80E trans harsh and late upshifts


Found trans to be a mis build,, had a rear planetary with no reluctor ring for the output speed sensor ,, sensor was picking up a false signal from moving internals. This caused a gear ratio error, wich defaulted the trans and was not contolling the pressure, default pressure went high causing late and harsh shifts .

Feb 10, 2009 | 1996 GMC Suburban

2 Answers

1994 Dodge Spirit Automatic Transaxle


Yes the computer uses TPS (throttle position sensor) and VSS (vehicle speed sensor) sensors information as well as fluid temp and other factors to determine shift points based on the info stored in the PROM (memory) IC chip, if it is not shifting then you either have a poor connection at the trans case electrical connector or a sticking shift solenoid inside the trans, I would pull the trans connector off and make sure it is clean and properly installed, look for a broken connector retainer as well, this is very common and can cause a loss of signal from the PCM (power train control module) module to the transmission shift solenoids. Most likely the 3rd gear shift solenoid is sticking off from sitting so long, had this happen on my truck, cleared itself.

Sep 18, 2008 | 1994 Dodge Spirit

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