VSS and Low Oil Level Switch Delete Question

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Dec 29, 2011 | 04:44 PM

Silver2000WS-6

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VSS and Low Oil Level Switch Delete Question

I am working on wiring my first engine in my brother tube buggy and am using information that has been provided on LT1swap.com. This info is very helpful and straight foward, but I have a few questions. It never mentioned me being able to remove the VSS sensors (my harness is from a '99 4wd 4L80E truck) so I have two sensors and they route back to C2 connections 20, 21, 22, and 23. Since this is an offroad buggy and will not have a speedometer, I assume I can delete them. Is this correct? By the way I am using a turbo 400.

Also LT1swap.com recommended removing C1 pin 70 (Low Oil Level Switch). This sounds like a good idea to me since the ride will be off camber a lot on the trails, but I was somewhat skeptical about removing it. This wasn't a typo was it? Thanks for any help.

Chase

Dec 29, 2011 | 06:17 PM

i r teh noobz

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The PCM still needs to know if you're moving/accelerating. Keep the VSS.

Low oil switch is useless as far as the PCM is concerned. Go ahead and delete it.

Dec 29, 2011 | 10:39 PM

Silver2000WS-6

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Quote:

Originally Posted by i r teh noobz

The PCM still needs to know if you're moving/accelerating. Keep the VSS.

Low oil switch is useless as far as the PCM is concerned. Go ahead and delete it.

Ok, I guess I should keep both VSS sensors? Since I am running a turbo 400 trans will I just leave the plugs open? If I can just leave the plugs open, how would this be different than just pinning them out?

Sounds good on the oil level switch.

Thanks for the help.

Dec 29, 2011 | 11:52 PM

garys 68

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I'm assuming your th400 wikk have a mechanical speedo output. Check out dakota digital for a mechanical vss.

Jan 2, 2012 | 11:21 PM

busta9876

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Quote:

Originally Posted by garys 68

I'm assuming your th400 wikk have a mechanical speedo output. Check out dakota digital for a mechanical vss.

The Dakota Digital SEN-4160 threads on the cable speedo output of most any GM trans or transfer case. This is a pass through style, and still lets you run a cable up to the speedometer after that. This sensor produces 8 pulses per revolution of the speedo cable. For the PCM to recognize vehicle speed, the PCM must be programmed with a speed pulse per revolution set to around 3 to 3.5 depending on your drive/driven gears in the tail housing. If this is not done, you might be lucky for the PCM to read 2-3 MPH if you are flat out. The stock sensor outputs 80,000 to 100,000 pulse/mile, where this one is going to generate 8000.

-Brendan.

Apr 21, 2019 | 10:40 PM

Keith81

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From: Arkansas

So regardless using a non electronic trans requires a vss? I removed that wire!

[QUOTE=Silver2000WS-6;15780653]Ok, I guess I should keep both VSS sensors? Since I am running a turbo 400 trans will I just leave the plugs open? If I can just leave the plugs open, how would this be different than just pinning them out?

Sounds good on the oil level switch.
So I’m running a 700r4 and still will need the vss I’m understanding. I removed the wire this evening can put it back but what’s involved?

Apr 21, 2019 | 11:06 PM

G Atsma

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From: Central Cal.

You're replying to a 7-year old thread.

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