Alright, I have owned this 94 bronco 5.0 with the e40d for 4 years. It has always had harsh/erratic shifts at times. I have had the tranny rebuilt(due to other issues) i replaced the vss in the rear diff when was home on leave and didn't have time to run the obdI. My cruise control has never worked, so i am assuming it is a wiring issue? Ive read alot about these e40d issues, but I havent exactly pinpointed the issue. I am leaving the sandbox shortly and would love to have this fixed after I get home so i can enjoy the summer.
94 Bronco with e40d issues
- Thread starter garrett
- Start date
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yo,
First of all, be safe there!
and Welcome to da Zone!
The cruise ctrl is under a recall now; get it done as soon as you get back and have time to take it a dealer; you should receive a letter from Ford soon. Here is my site's section on the sys and recall notice(s).
http://www.broncolinks.com/index.php?index=114
On the tranny, other than internal damage, This problem could be caused by a # of thangs;
bad vehicle speed sensor (VSS) (also called ABS,, DSS sensor) sensor on da 8.8 (rear differential)
connector/corroded wires inside connector; or cruddy/damaged tone ring in the 8.8 (Any slight dents, chips, etc., in either the exciter ring or VSS will create needle waver. Measure air gap between the VSS and exciter ring. It should be 0.38-0.51mm (0.015-0.020"). see TSB below)
bad wiring/shorts /connectors from VSS at firewall, at 4WABS Module and /or at PSOM and then onto the PCM and then to tranny
bad 4WABS Module - It is located below ws wiper fluid/coolant recovery tank. So, the connector can be corroded by leaking fluid
bad PSOM (Speedo)
Usually, it is the VSS sensor.
Is the Amber ABS Light on?
Is the PSOM needle jumpin' around wildly at times?
My 96's same symptoms (ABS light On and PSOM needle jumpin') were erratic until the 4WABS Module's microprocessors finally burnt-out. 4WABS Module, also called da ABS computer; 2 yard Modules were also bad; so I jumpered the Module out as Turbo Ghost
describes below.
To bypass the 4WABS module @it's harness's connector & feed the ABS signal directly to the PSOM,
Disconnect module (under coolant recovery /ws washer tank) & in connector
...jumper 14 (CKT 530, LG/Y) to 21 (CKT 519 (LG/BK) & 39 (CKT 491 (O/LB) to 22 (CKT 523, R/PK)...";
Source: by Turbo Ghost
http://img.photobucket.com/albums/v252/turboghost/ABSConnectorw-jumpers.jpg
Speed Input Signal Test @ PSOM in 93-96 Bronco; "...NOTE: Only wiring harness end of connector is to be probed. * Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -). * Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)? OR: If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -). Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)? OR: * If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and sensor & tone ring can be assumed to be good.
This is tuff to do; suggest using str8 pins to back probe the connector
Any slight dents, chips, etc., in either the exciter ring or VSS will create needle waver. Measure air gap between the VSS and exciter ring. It should be 0.38-0.51mm (0.015-0.020"). Check exciter ring runout per the same ring gear backface runout procedure of the appropriate model 1996 Powertrain/Drivetrain Service Manual, Section 05-00. Make sure the exciter ring is mounted correctly to the ring gear. If runout is more than 0.1mm (0.004"), perform the differential runout check per the procedure in the appropriate model 1996 Powertrain/Drivetrain Service Manual, Section 05-02A or 05-02D, to find cause and repair as needed
Tone Ring Inspection; "Take off the rear diff cover. Check the Ring Tone gear. It is located on the left hand side of the ring gear. Look to see if any of the teeth have been notched (from debris floating around in the diff.) Usually a spider gear. If the ring tone gear has been notched, it will need to be replaced to fix your speedo reading. Jack it up and rotate the tires to look for the teeth to be notched/broken/bent..."
Source: by Bighibbi
more VSS info in my site @ http://www.broncolinks.com/index.php?index=139
-
More 4WABS Info, Connector Location and pin out diagrams etc in my site @ http://www.broncolinks.com/index.php?index=240
--------------
Last;
a long shot..
PSOM Inoperative, Short Circuits, Common Locations TSB 95-02-11 for 92-95 Bronco & F Series; SEE C, E4OD Harsh Shifts & D, Code 452 - see Poss. Short Locations: 1. Driver's side A pillar trim screws may have been installed thru da 17K745 Sun Visor wire assy & .. bullet connector; 3. Scuff plate screws (driver's side) may pinch the 14A504 wire assy; 4 14401 wire assy may be trapped/pinched between Half car beam & instrument panel attachment (repeated as #7. the wire harness may be pinched/shorted behind the dash where the 14401 wire assy may come in contact w/a sharp edge on dash panel wall 5. shift cable assy near tranny may chaf the wire harness; the wire harness ; 7. repeated above..brake pedal-to-dash panel wall weld
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/registry/media/646262
Do this Last;
Speedometer Inoperative in TSB 95-5-21 for 92-95 Bronco & F Series; "...the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions....ISSUE: On some vehicles the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions:
ABS light on
Speedometer inoperative
Back-up lamps inoperative
Daytime running lamps inoperative
Trailer battery charge relay inoperative
MIL on, displaying Codes: 172, 173 or 41 for HO2S failure
Inadvertent PCM Self-Test
Perform self test KOEO and KOER, service any codes. : ..." READ MORE
Source: by Ford via Chilton @ http://content.chiltonsonline.com/TSB/displayTSBHandler.ashx?assetID=37000&key=6kAUBD5BruOJf%2f3tgozUqjXM3RdbjcQqW4sVWiE%2fp2IojfpfKqM07dr61%2bQAWHtT%2bshJrOWtEbHwvhgsAZPzfPNEDgviKncqfc3mHkrzcEoEdL99Ph3Gujftuw%2f3sDBIxZEqFQle7s1xdai2HmgR%2bA%3d%3d
================
Also get the Codes scanned for Free
The engine temperature must be greater than 50°F (10°C) to pass the KOEO and greater than 180°F (82°C) to pass the KOER.
Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accessories/lights, etc.
Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch.
Do Key On Engine Off (KOEO) portion first.
GL!
First of all, be safe there!
and Welcome to da Zone!
The cruise ctrl is under a recall now; get it done as soon as you get back and have time to take it a dealer; you should receive a letter from Ford soon. Here is my site's section on the sys and recall notice(s).
http://www.broncolinks.com/index.php?index=114
On the tranny, other than internal damage, This problem could be caused by a # of thangs;
bad vehicle speed sensor (VSS) (also called ABS,, DSS sensor) sensor on da 8.8 (rear differential)
connector/corroded wires inside connector; or cruddy/damaged tone ring in the 8.8 (Any slight dents, chips, etc., in either the exciter ring or VSS will create needle waver. Measure air gap between the VSS and exciter ring. It should be 0.38-0.51mm (0.015-0.020"). see TSB below)
bad wiring/shorts /connectors from VSS at firewall, at 4WABS Module and /or at PSOM and then onto the PCM and then to tranny
bad 4WABS Module - It is located below ws wiper fluid/coolant recovery tank. So, the connector can be corroded by leaking fluid
bad PSOM (Speedo)
Usually, it is the VSS sensor.
Is the Amber ABS Light on?
Is the PSOM needle jumpin' around wildly at times?
My 96's same symptoms (ABS light On and PSOM needle jumpin') were erratic until the 4WABS Module's microprocessors finally burnt-out. 4WABS Module, also called da ABS computer; 2 yard Modules were also bad; so I jumpered the Module out as Turbo Ghost
describes below.
To bypass the 4WABS module @it's harness's connector & feed the ABS signal directly to the PSOM,
Disconnect module (under coolant recovery /ws washer tank) & in connector
...jumper 14 (CKT 530, LG/Y) to 21 (CKT 519 (LG/BK) & 39 (CKT 491 (O/LB) to 22 (CKT 523, R/PK)...";
Source: by Turbo Ghost
http://img.photobucket.com/albums/v252/turboghost/ABSConnectorw-jumpers.jpg
Speed Input Signal Test @ PSOM in 93-96 Bronco; "...NOTE: Only wiring harness end of connector is to be probed. * Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -). * Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)? OR: If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -). Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)? OR: * If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and sensor & tone ring can be assumed to be good.
This is tuff to do; suggest using str8 pins to back probe the connector
Any slight dents, chips, etc., in either the exciter ring or VSS will create needle waver. Measure air gap between the VSS and exciter ring. It should be 0.38-0.51mm (0.015-0.020"). Check exciter ring runout per the same ring gear backface runout procedure of the appropriate model 1996 Powertrain/Drivetrain Service Manual, Section 05-00. Make sure the exciter ring is mounted correctly to the ring gear. If runout is more than 0.1mm (0.004"), perform the differential runout check per the procedure in the appropriate model 1996 Powertrain/Drivetrain Service Manual, Section 05-02A or 05-02D, to find cause and repair as needed
Tone Ring Inspection; "Take off the rear diff cover. Check the Ring Tone gear. It is located on the left hand side of the ring gear. Look to see if any of the teeth have been notched (from debris floating around in the diff.) Usually a spider gear. If the ring tone gear has been notched, it will need to be replaced to fix your speedo reading. Jack it up and rotate the tires to look for the teeth to be notched/broken/bent..."
Source: by Bighibbi
more VSS info in my site @ http://www.broncolinks.com/index.php?index=139
-
More 4WABS Info, Connector Location and pin out diagrams etc in my site @ http://www.broncolinks.com/index.php?index=240
--------------
Last;
a long shot..
PSOM Inoperative, Short Circuits, Common Locations TSB 95-02-11 for 92-95 Bronco & F Series; SEE C, E4OD Harsh Shifts & D, Code 452 - see Poss. Short Locations: 1. Driver's side A pillar trim screws may have been installed thru da 17K745 Sun Visor wire assy & .. bullet connector; 3. Scuff plate screws (driver's side) may pinch the 14A504 wire assy; 4 14401 wire assy may be trapped/pinched between Half car beam & instrument panel attachment (repeated as #7. the wire harness may be pinched/shorted behind the dash where the 14401 wire assy may come in contact w/a sharp edge on dash panel wall 5. shift cable assy near tranny may chaf the wire harness; the wire harness ; 7. repeated above..brake pedal-to-dash panel wall weld
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/registry/media/646262
Do this Last;
Speedometer Inoperative in TSB 95-5-21 for 92-95 Bronco & F Series; "...the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions....ISSUE: On some vehicles the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions:
ABS light on
Speedometer inoperative
Back-up lamps inoperative
Daytime running lamps inoperative
Trailer battery charge relay inoperative
MIL on, displaying Codes: 172, 173 or 41 for HO2S failure
Inadvertent PCM Self-Test
Perform self test KOEO and KOER, service any codes. : ..." READ MORE
Source: by Ford via Chilton @ http://content.chiltonsonline.com/TSB/displayTSBHandler.ashx?assetID=37000&key=6kAUBD5BruOJf%2f3tgozUqjXM3RdbjcQqW4sVWiE%2fp2IojfpfKqM07dr61%2bQAWHtT%2bshJrOWtEbHwvhgsAZPzfPNEDgviKncqfc3mHkrzcEoEdL99Ph3Gujftuw%2f3sDBIxZEqFQle7s1xdai2HmgR%2bA%3d%3d
================
Also get the Codes scanned for Free
The engine temperature must be greater than 50°F (10°C) to pass the KOEO and greater than 180°F (82°C) to pass the KOER.
Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accessories/lights, etc.
Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch.
Do Key On Engine Off (KOEO) portion first.
GL!
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