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Transmission won’t shift!!

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Old Jul 9, 2021 | 09:58 PM
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Default Transmission won’t shift!!

Hello everyone I’m new to the whole LS forums. I need help with my 1962 c10 I LS swapped and it has a 4l60e when I went to drive it it wouldn’t shift i’m guessing I’m stuck in limp mode or something. On my scanner it says I’m in 2rd gear when I put it in drive. I know for a fact I have my linkage set up properly for the transmission in the truck. The only code I’m getting is a p0706 Transmission Range Sensor Circuit Out Of Range. But the thing is I don’t have that wire in my Standalone wiring harness. I don’t know what to do I’ve tried everything done a lot research but can’t find anything on this subject. Please help!!!
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Old Jul 10, 2021 | 08:03 AM
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The pressure manifold switch that bolts to the valve body tells the PCM what range the trans is in. If you had the pressure manifold switch off and were not careful when cleaning it you can knock the seals and round plastic films off the switch. If you don't notice that you have knocked one of these off the switch will not work correctly. Or you just wired something wrong.
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Old Jul 10, 2021 | 01:55 PM
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Do you have a Vehicle Speed Sensor signal going into the PCM? If not, it won't shift. For all the transmission knows in this situation, its sitting still. Why shift?

Rick
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Old Jul 11, 2021 | 12:50 PM
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Originally Posted by B52bombardier1
Do you have a Vehicle Speed Sensor signal going into the PCM? If not, it won't shift. For all the transmission knows in this situation, its sitting still. Why shift?

Rick
Yes it does have a VSS going to the PCM. It’s weird because the speed is good but no shift! Or maybe it’s a bad VSS? I can put it all the way down into 1st gear and then shift to into 2rd gear but then I try to shift it in 3rd and nothing? What kind of voltage does the vss wire have? I actually need to see if it’s getting power but I think it is because my Gauge is working maybe I have it hooked up wrong or something

Last edited by Landos62; Jul 11, 2021 at 12:58 PM.
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Old Jul 11, 2021 | 05:05 PM
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Which "Stand-Alone" Wiring-Harness are you using?
What are you using to control the Transmission, and which inputs are you using?
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