Speedometer troubles
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Speedometer troubles
I've looked through alot of threads but couldn't find the answer to this question....
Is there anything besides the VSS, cable or PSOM that would make your speedometer stop working? Would a bad MLPS cause it to go out?? This is on a 1990 f350 7.5l truck.
Is there anything besides the VSS, cable or PSOM that would make your speedometer stop working? Would a bad MLPS cause it to go out?? This is on a 1990 f350 7.5l truck.
Post Fiend
Joined: Mar 2002
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From: Bonita Springs FL
You don't have a PSOM, and the only thing your VSS runs is the RABS system. Your MLPS has nothing to do with the speedometer.
Your problem is somewhere along the cable that runs from the tranny tailshaft (or transfer case) to the back of the gauge cluster. Sometimes the plastic speedometer gear breaks, that's probably the most common cause. If you've had the cluster off recently maybe you didn't get the cable on all the way.
Your problem is somewhere along the cable that runs from the tranny tailshaft (or transfer case) to the back of the gauge cluster. Sometimes the plastic speedometer gear breaks, that's probably the most common cause. If you've had the cluster off recently maybe you didn't get the cable on all the way.
Thread Starter
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Freshman User
Joined: Oct 2008
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You don't have a PSOM, and the only thing your VSS runs is the RABS system. Your MLPS has nothing to do with the speedometer.
Your problem is somewhere along the cable that runs from the tranny tailshaft (or transfer case) to the back of the gauge cluster. Sometimes the plastic speedometer gear breaks, that's probably the most common cause. If you've had the cluster off recently maybe you didn't get the cable on all the way.
Your problem is somewhere along the cable that runs from the tranny tailshaft (or transfer case) to the back of the gauge cluster. Sometimes the plastic speedometer gear breaks, that's probably the most common cause. If you've had the cluster off recently maybe you didn't get the cable on all the way.
Oh yeah one thing i noticed is when I disconnect the speedo cable from thhe VSS there is only about 1/4" of cable sticking out...does that sound normal?
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
What tranny do you have and is it a 4x4?
It seems that parts stores always give you the wrong VSS. There are two, one in the tranny or transfer case, and another the rear axle. They don't look the same at all. To be honest I'm not sure how much cable should be sticking out. I would probably put it up on good jackstands (and point it away from expensive stuff), start it up and put it in gear. You should be able to figure out where the break is pretty easily that way.
It seems that parts stores always give you the wrong VSS. There are two, one in the tranny or transfer case, and another the rear axle. They don't look the same at all. To be honest I'm not sure how much cable should be sticking out. I would probably put it up on good jackstands (and point it away from expensive stuff), start it up and put it in gear. You should be able to figure out where the break is pretty easily that way.
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Freshman User
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What tranny do you have and is it a 4x4?
It seems that parts stores always give you the wrong VSS. There are two, one in the tranny or transfer case, and another the rear axle. They don't look the same at all. To be honest I'm not sure how much cable should be sticking out. I would probably put it up on good jackstands (and point it away from expensive stuff), start it up and put it in gear. You should be able to figure out where the break is pretty easily that way.
It seems that parts stores always give you the wrong VSS. There are two, one in the tranny or transfer case, and another the rear axle. They don't look the same at all. To be honest I'm not sure how much cable should be sticking out. I would probably put it up on good jackstands (and point it away from expensive stuff), start it up and put it in gear. You should be able to figure out where the break is pretty easily that way.
If you or anyone else by any chance knows the correct part number for the VSS please post it up....Thanks
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update
I installed the proper VSS from the dealer a few days ago and took the truck out today after finishing off another repair. She ran properly for the first time in weeks. Everything's coming together...side note I didn't realize the new VSS doesn't come with a new speedo pinion gear....
I installed the proper VSS from the dealer a few days ago and took the truck out today after finishing off another repair. She ran properly for the first time in weeks. Everything's coming together...side note I didn't realize the new VSS doesn't come with a new speedo pinion gear....
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