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What would cause shift stacking

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Old Mar 14, 2016 | 11:49 AM
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What would cause shift stacking

Shift stacking when it goes 1-2-3 right after each other and your in 3rd at 20m/h (for example) and the thing is gutless.

What causes this?
 
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Old Mar 14, 2016 | 12:20 PM
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Bad throttle position sensor, bad VSS. Start by checking for codes.
 
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Old Mar 14, 2016 | 12:23 PM
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previous owner removed CEL bulb. i need to buy a test light.
 
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Old Mar 14, 2016 | 12:26 PM
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Why not just buy a replacement check engine light bulb?
 
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Old Mar 14, 2016 | 12:32 PM
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i have had the cluster out once, it was a pain. I have another cluster with a tach to put in, just haven't wanted to deal with the pain of pulling it again. Bought the tach cluster 3-4 months ago, just haven't gotten up the gumption to take the dash apart.
 
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Old Mar 14, 2016 | 12:33 PM
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where is the vss located?
 
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Old Mar 14, 2016 | 12:47 PM
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i have looked through alldata, and still have not come across a diagram that shows me the location.
 
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Old Mar 14, 2016 | 01:04 PM
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On top of the rear axle.
 
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Old Mar 14, 2016 | 01:05 PM
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thank you.
 
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Old Mar 14, 2016 | 01:33 PM
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Originally Posted by Benningtonr
Shift stacking when it goes 1-2-3 right after each other and your in 3rd at 20m/h (for example) and the thing is gutless.

What causes this?
A frequent cause of this is the PCM thinking the transfer case is in 4x4 low. There is a pin on the PCM that detects this. I forget (it's been many years) whether it looks for a ground or +12v in this circuit to indicate that it is in 4x4L.
 
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Old Mar 16, 2016 | 11:58 AM
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after driving it yesterday, it is not shifting as fast as I thought, but the issue is with it being gutless in O/D. I am guessing 31 in tires and 3.31 gears are causing this.
 
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Old Mar 16, 2016 | 12:48 PM
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Originally Posted by Benningtonr
after driving it yesterday, it is not shifting as fast as I thought, but the issue is with it being gutless in O/D. I am guessing 31 in tires and 3.31 gears are causing this.
Correction: 302 engine, 31 inch tires and 3.31 gears are causing the gutless operation in O/D.
 
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Old Mar 16, 2016 | 01:13 PM
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unfortunate but true
 
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Old Mar 16, 2016 | 01:22 PM
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Did you recalibrate the PSOM for the taller tires?
 
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Old Mar 16, 2016 | 01:27 PM
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i do not know, but i doubt it. Truck came with the taller tires. that would have to be done by the dealer?
 
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