Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 06-22-2011, 05:34 PM
BRay09's Avatar
BRay09 BRay09 is offline
Posting Guru
 
Join Date: Oct 2008
Location: Elyria, OH
Posts: 2,087
BRay09 is gaining momentum as a positive member of FTE.
95 F150 hard shifting and erratic speedo

When i took the truck for a drive, it was shifing funny. Floor it and it revs high and slowly picks up speed. It acts like it doesnt know what gear to be in. The speedo is also jumping around and will not tell me the speed i am traveling. The motor is the I6 with the E4OD behind it.

I ran the codes and got a 452 in the CM. This states
Computer detected an error in the VSS or PSOM signal during the last 80 warm-up cycles.

The guy said that he replaced the VSS in the dif. I do not know what or where the PSOM is or if it is the same as the VSS.

Could that be my whole problem here?
__________________
Guzzy
1989 F250 Custom
351W with Crane 444232 Cam, 1.7RR in GT40 heads, summit shorties (waiting on Pacesetter LTs)

Isn't the fastest thing, but we will pull your house down
Reply With Quote
  #2 (permalink)  
Old 06-22-2011, 06:37 PM
Eddiec1564 Eddiec1564 is offline
Posting Guru
 
Join Date: Mar 2007
Location: Arcadia, Fla
Posts: 1,951
Eddiec1564 has a good reputation on FTE.Eddiec1564 has a good reputation on FTE.Eddiec1564 has a good reputation on FTE.
The PSOM is the speedometer itself. It reads the VSS (vehicle speed sensor) which is located on the top of the rear axle. As the speedometer(PSOM) reads the VSS it processes the VSS and resends the speed info to the ECU(engine control unit) which controls how the engine/transmission operates. Since the speedo it bouncing around I think you should check the VSS in the rear axle. Even if someone said they replaced it, there could be bad wireing connections or the sensor impropely installed.

If the VSS checks ok, you may have to check the tone ring inside the axle it may be dammaged. If that is Ok, then the PSOM could be the problem and best way to check it out is find one in a junkyard and swap it in.
__________________
95 E350 460/E4od 4.10 The Bus
89 F250 2x4 300/AOD 3.55
84 F250 4x4 300/np435 3.55 The BLUE MULE
85 Plymouth Caravelle
73 Buick LeSabre
Reply With Quote
  #3 (permalink)  
Old 06-22-2011, 08:48 PM
BRay09's Avatar
BRay09 BRay09 is offline
Posting Guru
 
Join Date: Oct 2008
Location: Elyria, OH
Posts: 2,087
BRay09 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by Eddiec1564 View Post
The PSOM is the speedometer itself. It reads the VSS (vehicle speed sensor) which is located on the top of the rear axle. As the speedometer(PSOM) reads the VSS it processes the VSS and resends the speed info to the ECU(engine control unit) which controls how the engine/transmission operates. Since the speedo it bouncing around I think you should check the VSS in the rear axle. Even if someone said they replaced it, there could be bad wireing connections or the sensor impropely installed.

If the VSS checks ok, you may have to check the tone ring inside the axle it may be dammaged. If that is Ok, then the PSOM could be the problem and best way to check it out is find one in a junkyard and swap it in.
Would one out of a 94 f250 work with this 95 f150?
Reply With Quote
  #4 (permalink)  
Old 06-23-2011, 07:06 PM
Eddiec1564 Eddiec1564 is offline
Posting Guru
 
Join Date: Mar 2007
Location: Arcadia, Fla
Posts: 1,951
Eddiec1564 has a good reputation on FTE.Eddiec1564 has a good reputation on FTE.Eddiec1564 has a good reputation on FTE.
The PSOM itself should be a direct swap. As for the whole cluster, I am not sure without relooking up the info again
__________________
95 E350 460/E4od 4.10 The Bus
89 F250 2x4 300/AOD 3.55
84 F250 4x4 300/np435 3.55 The BLUE MULE
85 Plymouth Caravelle
73 Buick LeSabre
Reply With Quote
  #5 (permalink)  
Old 06-23-2011, 10:46 PM
jimbo285's Avatar
jimbo285 jimbo285 is offline
Senior User
 
Join Date: Apr 2011
Location: Fairbanks
Posts: 305
jimbo285 is starting off with a positive reputation.
My 96 F250 with 7.5 had jumpy speedometer needle, late shifting and extremely hard shift, died when shifting into reverse or drive...changed instrument cluster (Speedo, tach and all gauges) fixed everything.
__________________
94 Bronco XL 5.0 (gutless) 31" BFGs
96 F250 XLT 460 4" rancho 33" BFGs
93 Harley Heritage Softail (just for fun)
Reply With Quote
  #6 (permalink)  
Old 06-24-2011, 08:47 AM
subford's Avatar
subford subford is offline
Post Fiend
 
Join Date: Aug 2005
Location: Easton,Ks
Posts: 16,709
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
The PSOM:
Click the image to open in full size.

/
__________________
95 F150 302 4R70W EB EX-CAB
94 F53 460 E4OD COACHMEN SANTARA RV
83 F150 Flare Side 351W AOD
77 F250 351M-2V NP 435/4 Speed 4X4
subford@gmail.com
Bill K, Kansas Chapter
Reply With Quote
  #7 (permalink)  
Old 06-24-2011, 12:25 PM
BRay09's Avatar
BRay09 BRay09 is offline
Posting Guru
 
Join Date: Oct 2008
Location: Elyria, OH
Posts: 2,087
BRay09 is gaining momentum as a positive member of FTE.
Can i just swap that from the 94 F250 to the 95 F150 from the back of the cluster, or is it easier to just swap clusters?
__________________
Guzzy
1989 F250 Custom
351W with Crane 444232 Cam, 1.7RR in GT40 heads, summit shorties (waiting on Pacesetter LTs)

Isn't the fastest thing, but we will pull your house down
Reply With Quote
  #8 (permalink)  
Old 06-24-2011, 12:34 PM
subford's Avatar
subford subford is offline
Post Fiend
 
Join Date: Aug 2005
Location: Easton,Ks
Posts: 16,709
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
You have to take the speedometer head out and then the PSOM unplugs from the speedometer after you take the PSOM screws out. It comes out the front.
Swapping clusters is easier as you do not have to take the cluster apart.

Click the image to open in full size.

Click the image to open in full size.

/
__________________
95 F150 302 4R70W EB EX-CAB
94 F53 460 E4OD COACHMEN SANTARA RV
83 F150 Flare Side 351W AOD
77 F250 351M-2V NP 435/4 Speed 4X4
subford@gmail.com
Bill K, Kansas Chapter
Reply With Quote
  #9 (permalink)  
Old 06-24-2011, 02:54 PM
BRay09's Avatar
BRay09 BRay09 is offline
Posting Guru
 
Join Date: Oct 2008
Location: Elyria, OH
Posts: 2,087
BRay09 is gaining momentum as a positive member of FTE.
How easy is the cluster to take out? I have till sunday to get this truck done. Let's hope it isnt too difficult.

Still need to swap gear boxes. Of course the 150 and the 250 use different pitman arms... These are a pain to get off!
__________________
Guzzy
1989 F250 Custom
351W with Crane 444232 Cam, 1.7RR in GT40 heads, summit shorties (waiting on Pacesetter LTs)

Isn't the fastest thing, but we will pull your house down
Reply With Quote
  #10 (permalink)  
Old 06-24-2011, 03:46 PM
tony. b tony. b is offline
Junior User
 
Join Date: Apr 2011
Location: pittsburgh pa
Posts: 92
tony. b is starting off with a positive reputation.
It's not hard. I just did mine today had it out in about 20 mins. Pop off the two trim pieces under them are two torx screws then you can get the dash bezel out, there is also a couple clips that hold it in so don't just yank it then unplug tank selector switch so you can get the bezel out of the way. Then take off the panel underneath the wheel two screws and a few clips. I took the plastic from around the Colum off I'm not sure I had to but the cluster didn't seem to want to come out with it on. It's four screws on the under side then take out the ignition cylinder and the plastic will be out of the way. Then shook the little cable for the shift indicator. Then four screws on the cluster and you can pull it out enough to unplug the three plugs behind it and it will come out. Sounds like a lot ,but its really not like I said had mine out in 20minutes.
Reply With Quote
  #11 (permalink)  
Old 06-24-2011, 05:31 PM
tony. b tony. b is offline
Junior User
 
Join Date: Apr 2011
Location: pittsburgh pa
Posts: 92
tony. b is starting off with a positive reputation.
Meant to say unhook the cable not shook.
Reply With Quote
  #12 (permalink)  
Old 06-24-2011, 06:31 PM
BRay09's Avatar
BRay09 BRay09 is offline
Posting Guru
 
Join Date: Oct 2008
Location: Elyria, OH
Posts: 2,087
BRay09 is gaining momentum as a positive member of FTE.
Well i swapped clusters and its still doing the same thing... Is there another VSS in the trans? parts store guy said there is two listings for this truck. Ill be checking the one out in the diff in the mean time
__________________
Guzzy
1989 F250 Custom
351W with Crane 444232 Cam, 1.7RR in GT40 heads, summit shorties (waiting on Pacesetter LTs)

Isn't the fastest thing, but we will pull your house down
Reply With Quote
  #13 (permalink)  
Old 06-24-2011, 07:17 PM
tony. b tony. b is offline
Junior User
 
Join Date: Apr 2011
Location: pittsburgh pa
Posts: 92
tony. b is starting off with a positive reputation.
From what I've learned on this forum there is only one and its on the rear diff. My 94 only has the one on the diff.
Reply With Quote
  #14 (permalink)  
Old 06-24-2011, 07:19 PM
subford's Avatar
subford subford is offline
Post Fiend
 
Join Date: Aug 2005
Location: Easton,Ks
Posts: 16,709
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
Yes the 95 only has the one VSS on the rear end.
__________________
95 F150 302 4R70W EB EX-CAB
94 F53 460 E4OD COACHMEN SANTARA RV
83 F150 Flare Side 351W AOD
77 F250 351M-2V NP 435/4 Speed 4X4
subford@gmail.com
Bill K, Kansas Chapter
Reply With Quote
  #15 (permalink)  
Old 06-24-2011, 07:23 PM
subford's Avatar
subford subford is offline
Post Fiend
 
Join Date: Aug 2005
Location: Easton,Ks
Posts: 16,709
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
All so try unplugging the Speed Control Module as that can give that codes also along with hard shifting just like the VSS or PSOM. I see now you said the speedometer was jumping so the speed control module would not be it.
You might try unplugging the RABS Module also as it can give this code also.
Or just unplug them both and see what happens.
__________________
95 F150 302 4R70W EB EX-CAB
94 F53 460 E4OD COACHMEN SANTARA RV
83 F150 Flare Side 351W AOD
77 F250 351M-2V NP 435/4 Speed 4X4
subford@gmail.com
Bill K, Kansas Chapter
Reply With Quote
Old 06-24-2011, 07:23 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

Tags
1995, bouncing, eratic, f150, f250, ford, gear, hard, jumping, passing, rough, shift, shifting, speedometer, transmission, troubleshooting

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 04:18 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup