LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

VSS Question

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Old Jan 1, 2010 | 08:23 PM
  #1  
carkook's Avatar
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VSS Question

Well I have pretty much everything done with my harness, extended and have every wire located and labeled so the swap should go smooth. Im getting a chip sent to me to get rid of the vss and switch it from auto to manuel.

The only question I have left is about the VSS wiring. Im using a 93 lt1 PCM and the stock T5 that I have in my 92 camaro. The PCM recieves the VSS HI(yel) and VSS LO(ppl) then has the 4000 ppm output. So my VSS also gives out the VSS HI(yel) and VSS LO(ppl) and then has the 4000 ppm output as well(I think). So I just cut a solder those wires to the VSS on the T5 right?


Car is a 92 rs with the 305/T5
LT1 with crank pulley headers and a chip im hoping for 315+ HP
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Old Jan 1, 2010 | 09:19 PM
  #2  
1989GTATransAm's Avatar
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: VSS Question

Yes, but is the 4000ppm the right signal for the LT1 ECM? It might be for a 93 but I know for later it is not. I'm just wondering.
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Old Jan 1, 2010 | 10:13 PM
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Re: VSS Question

Yeah im pretty sure in 93 they still used 4000 ppm.

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Old Jan 1, 2010 | 10:21 PM
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Car: 91 Trans Am
Re: VSS Question

Plug into the stock VSS. Swap the connector if you have to

Somewhere in the years GM switched the HI/LO signal colors. If your speedo doesnt work, try reversing the wires
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Old Jan 1, 2010 | 10:31 PM
  #5  
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Re: VSS Question

Alright sounds good. Thanks for the help
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