High Speed Transmission Slippage
#1
01-22-2017
Join Date: May 2010
Location: baltimore
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High Speed Transmission Slippage
High speed transmission slippage
2003 Ranger XLT
3.0L with an Automatic
120000 miles
Tans Fluid & filter have been changed twice with synthetic oil.
The Problem:
I drive 80 miles one way to work on a interstate with a posted speed limit of 70mph. With the cruise control set at 75mph about half way into my commute when the truck is under load going up a hill the trans starts slipping in and out of gear. When the cruise control is set at 68 mph no issues. I am aware of the issue of the valve body gasket. Is this a gasket issue, solenoid issue, or is this an early sign of major transmission problems?
Thank you in advance for your insights.
2003 Ranger XLT
3.0L with an Automatic
120000 miles
Tans Fluid & filter have been changed twice with synthetic oil.
The Problem:
I drive 80 miles one way to work on a interstate with a posted speed limit of 70mph. With the cruise control set at 75mph about half way into my commute when the truck is under load going up a hill the trans starts slipping in and out of gear. When the cruise control is set at 68 mph no issues. I am aware of the issue of the valve body gasket. Is this a gasket issue, solenoid issue, or is this an early sign of major transmission problems?
Thank you in advance for your insights.
#2
01-22-2017
Very good article and video at the end, look here: This Is How An Automatic Transmission Works
And watch the video at the end.
OK so now you know how a transmission works, well somewhat, lol.
Automatics run on Pressure, pressure changes are used to select the different gears
Reverse requires the highest pressure which is why when a transmission is starting to fail you will often notice problems in Reverse first.
The valve body is how pressure is transferred to the different bands and clutches, the solenoids run these passages in electronic transmissions.
And leaks in the solenoid valves or valve body gaskets and seals can cause different problems depending on where and how much pressure is being lost.
Could be at 70mph you are losing enough pressure for slipping and are not at 68.
As you can see in the video ALL the gears are always meshed, so slipping is from loss of pressure, could be failing clutches too but in either case trans should be rebuilt.
I would stay under 70 and see how long you can get from the transmision
And watch the video at the end.
OK so now you know how a transmission works, well somewhat, lol.
Automatics run on Pressure, pressure changes are used to select the different gears
Reverse requires the highest pressure which is why when a transmission is starting to fail you will often notice problems in Reverse first.
The valve body is how pressure is transferred to the different bands and clutches, the solenoids run these passages in electronic transmissions.
And leaks in the solenoid valves or valve body gaskets and seals can cause different problems depending on where and how much pressure is being lost.
Could be at 70mph you are losing enough pressure for slipping and are not at 68.
As you can see in the video ALL the gears are always meshed, so slipping is from loss of pressure, could be failing clutches too but in either case trans should be rebuilt.
I would stay under 70 and see how long you can get from the transmision
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