95 f250 HARD shifting problem
#1
95 f250 HARD shifting problem
hey all, I have a 1995 f250 7.5L 460. This thing shifts very hard from 1-2 and into R. I had the tranny rebuilt from a transmission shop and it still shifts very hard. Brought it back and they cant figure it out. they say that is just how it is.
Is there anything else it could be like a tranny module or something?
Any help would be appriciated.
Thanks
Jon
Is there anything else it could be like a tranny module or something?
Any help would be appriciated.
Thanks
Jon
#2
The transmission is 100% electronic controlled, it would be my best suggestion to check for codes. Many times there can be a problem without having a Check Engine Light. Warm up the engine and transmission then do this: Ford Fuel Injection » How To Run a Self-Test or purchase one of these: Equus 3145.
#4
The transmission is 100% electronic controlled, it would be my best suggestion to check for codes. Many times there can be a problem without having a Check Engine Light. Warm up the engine and transmission then do this: Ford Fuel Injection » How To Run a Self-Test or purchase one of these: Equus 3145.
would a speed sensor come up in the codes or transmission module?
Thanks
#5
#6
#7
It is possible to have a TPS or VSS problem without triggering a code. You can test the TPS output with a meter to see if there are dips/ripples in the output signal. The VSS is a little tougher without an oscilloscope.
Use this as a reference for the TPS: Ford Fuel Injection » Throttle Position Sensor (TPS)
Many times when the VSS has a problem it will trigger a code, but for you that is not the case. If the TPS appears okay, then I would suggest trying a new VSS.
Use this as a reference for the TPS: Ford Fuel Injection » Throttle Position Sensor (TPS)
Many times when the VSS has a problem it will trigger a code, but for you that is not the case. If the TPS appears okay, then I would suggest trying a new VSS.
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#8
It is possible to have a TPS or VSS problem without triggering a code. You can test the TPS output with a meter to see if there are dips/ripples in the output signal. The VSS is a little tougher without an oscilloscope.
Use this as a reference for the TPS: Ford Fuel Injection » Throttle Position Sensor (TPS)
Many times when the VSS has a problem it will trigger a code, but for you that is not the case. If the TPS appears okay, then I would suggest trying a new VSS.
Use this as a reference for the TPS: Ford Fuel Injection » Throttle Position Sensor (TPS)
Many times when the VSS has a problem it will trigger a code, but for you that is not the case. If the TPS appears okay, then I would suggest trying a new VSS.
#9
#10
Thanks...
#11
I have no idea how something in an instrument cluster would make and engine have a sputtering problem.
You have no out going signals from the instrument cluster other then to turn on the alternator and the speed signal form the PSOM to the PCM.
I do not think your ford master tech knew what he was talking about.
If anyone can explain how an instrument cluster could do this please post in this thread.
On the other hand the PSOM in the instrument cluster can cause hard shifting in the forward gears as if the PCM loses the speed signal the transmission will go to max oil pressure.
I do not think this would have anything to do with "R" however.
You have no out going signals from the instrument cluster other then to turn on the alternator and the speed signal form the PSOM to the PCM.
I do not think your ford master tech knew what he was talking about.
If anyone can explain how an instrument cluster could do this please post in this thread.
On the other hand the PSOM in the instrument cluster can cause hard shifting in the forward gears as if the PCM loses the speed signal the transmission will go to max oil pressure.
I do not think this would have anything to do with "R" however.
#12
I have no idea how something in an instrument cluster would make and engine have a sputtering problem.
You have no out going signals from the instrument cluster other then to turn on the alternator and the speed signal form the PSOM to the PCM.
I do not think your ford master tech knew what he was talking about.
If anyone can explain how an instrument cluster could do this please post in this thread.
On the other hand the PSOM in the instrument cluster can cause hard shifting in the forward gears as if the PCM loses the speed signal the transmission will go to max oil pressure.
I do not think this would have anything to do with "R" however.
You have no out going signals from the instrument cluster other then to turn on the alternator and the speed signal form the PSOM to the PCM.
I do not think your ford master tech knew what he was talking about.
If anyone can explain how an instrument cluster could do this please post in this thread.
On the other hand the PSOM in the instrument cluster can cause hard shifting in the forward gears as if the PCM loses the speed signal the transmission will go to max oil pressure.
I do not think this would have anything to do with "R" however.
Well thats what I thought but when I replaced the cluster it was fixed. however I think I may have gotten one from a 5.8L. When I had this problem the Tac would jump arround out of control and it would sputter, Stall and act like it was running out of gas. The guy came by and disconnected the VSS and it corrected it but the tranny hit hard. He told me I needed a new cluster. I replaced the cluster, reconnected the VSS and it wasnt sputtering anymore, but the tranny still hit hard.
And ya R hits really hard, probably worse than the others.
#13
#15
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hey all, I have a 1995 f250 7.5L 460. This thing shifts very hard from 1-2 and into R. I had the tranny rebuilt from a transmission shop and it still shifts very hard. Brought it back and they cant figure it out. they say that is just how it is.
Is there anything else it could be like a tranny module or something?
Any help would be appriciated.
Thanks
Jon
Is there anything else it could be like a tranny module or something?
Any help would be appriciated.
Thanks
Jon
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