4L80E Guys Come In - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jkade · 03-01-2011, 05:50 PM

Fixing to start a 6.0/4L80E swap in my buddies 88 4x4 suburban. It has the mech speedo, what will I need to get to make this work? This is the 1st time I have messed with an 80e. I understand they need a vss input?

Jonboy · 03-01-2011, 06:05 PM

The easiest way is to swap the cluster to a 90-91 electronic cluster, and run the VSS output into that. The only way I can think of to keep the original gauge would be to run something like a Cable X box.

jkade · 03-01-2011, 06:09 PM

Quote:

Originally Posted by Jonboy

The easiest way is to swap the cluster to a 90-91 electronic cluster, and run the VSS output into that. The only way I can think of to keep the original gauge would be to run something like a Cable X box.

Does a 4x4 4l80e have the vss output on the tcase or is it in the trans? I would like to use the 208 and the stock cable speedo but I was thinking he might have a get a 91 np241 and a 91 cluster so we would have vss. I know the computer is going to need to know if it is in 4low or 4high to make the trans shift correct.

Jonboy · 03-01-2011, 06:15 PM

I don't 100% know. I can cehck with the trans guy at work to see what he thinks. Are you going LS in this one? If so, I think the VSS signal to the speedo comes from the PCM.

jkade · 03-01-2011, 06:19 PM

Quote:

Originally Posted by Jonboy

I don't 100% know. I can cehck with the trans guy at work to see what he thinks. Are you going LS in this one? If so, I think the VSS signal to the speedo comes from the PCM.

Yes going with a lq4. I know the pcm puts out the signal for the speedo but it needs the signal from a vss. I just went out and looked at a 95 and the vss is on the tcase on it. Looks like he needs a 241 and a 91 cluster.

Jonboy · 03-01-2011, 11:58 PM

That's probably the easiest. Should solve a couple of your issues.

03-01-2011, 05:50 PM	#1
jkade Senior Member Join Date: Nov 2005 Location: AL Posts: 2,517	4L80E Guys Come In Fixing to start a 6.0/4L80E swap in my buddies 88 4x4 suburban. It has the mech speedo, what will I need to get to make this work? This is the 1st time I have messed with an 80e. I understand they need a vss input?

03-01-2011, 06:05 PM	#2
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: 4L80E Guys Come In The easiest way is to swap the cluster to a 90-91 electronic cluster, and run the VSS output into that. The only way I can think of to keep the original gauge would be to run something like a Cable X box. __________________ 1974 Jimmy- 5.3/4L80e/NP241

03-01-2011, 06:15 PM	#4
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: 4L80E Guys Come In I don't 100% know. I can cehck with the trans guy at work to see what he thinks. Are you going LS in this one? If so, I think the VSS signal to the speedo comes from the PCM. __________________ 1974 Jimmy- 5.3/4L80e/NP241

03-01-2011, 11:58 PM	#6
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: 4L80E Guys Come In That's probably the easiest. Should solve a couple of your issues. __________________ 1974 Jimmy- 5.3/4L80e/NP241



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