Best gauge cluster for my 1989 pickup LS1 swap

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Best gauge cluster for my 1989 pickup LS1 swap

Postby carwhisperer » Wed Feb 22, 2017 9:45 pm

I am doing an LS1 (2000 Camaro SS donor) swap into a 1989 Isuzu spacecab. The truck came with a mechanical speedo. I have read about swapping clusters from an Amigo, Rodeo or Trooper with electric speedos for V6 swaps. The trans is an electric VSS 4L60E automatic. My understanding is that the GM VSS produces 2000 ppm (pulses per mile). Would anyone know which cluster might be the best choice? It would be awesome if I didn't have to modify the signal, but I will if I need to. I guess the GM sourced V6's were used in the late 80's/early 90's. Would one of these be a good choice? Were there speedos electric? If so, I suppose this would be like doing an LS swap into a GM car of similar vintage, which I think is doable. For example, I got an 88 Fiero speedo to work, which was being driven by the VSS/ECU from a 2001 L67 V6, using a circuit I found online.
Last edited by carwhisperer on Wed Mar 22, 2017 1:24 pm, edited 1 time in total.
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby gb89amigo » Thu Feb 23, 2017 2:48 am

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Future: Install the "Big Brake" upgrade, so I don't break things! . Acquired '95 V6 Passport/Rodeo front rotors (11.04") and assemblies. Need to pull G80/LSD rear from '92-'97 Trooper.
'90 Amigo 4WD, Parts car

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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby gwana66 » Thu Feb 23, 2017 10:25 am

The Troopers with the 2.8 or 3.1 V6 and auto trans are almost entirely GM powertrain and electronics. I would think the VSS would be compatible. Later models with the Isuzu 3.2 used the same trans, but the signal may have gone through the ECM.
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby carwhisperer » Thu Feb 23, 2017 1:24 pm

gwana66 wrote:The Troopers with the 2.8 or 3.1 V6 and auto trans are almost entirely GM powertrain and electronics. I would think the VSS would be compatible. Later models with the Isuzu 3.2 used the same trans, but the signal may have gone through the ECM.


Thanks! What vintage are those Troopers? Will the cluster from Troopers of those years fit right into the pickup dash?
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby gwana66 » Thu Feb 23, 2017 2:40 pm

Further digging seems to indicate that the Trooper used a mechanical speedo as well until 1992, so I guess that's out.

Something like Autometer might be the way to go - you can choose whatever VSS input you want.
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby carwhisperer » Thu Feb 23, 2017 8:47 pm

In that case, is there any Isuzu cluster with an electric speedo that will fit in my dash?
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby robb5 » Fri Feb 24, 2017 1:42 am

Thought about using a mid sized tablet? Runs thru the Ecm and gives way more info.
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby squatch » Mon Mar 20, 2017 9:19 pm

Both the 1st gen Troopers and '88-'95 Pickups use a mechanical cable speedo from the trans or transfer case. At the cluster is where the pulse signal for the ECM is generated. Gizmo at the cable end. Probably doesn't matter where the pulse comes from as long as you can access the signal and it's the right frequency. They make boxes that can splice into the line and are adjustable. You can match the VSS signal from one side and convert that to what the ecm wants from the other side. I might even still have one around here.
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby carwhisperer » Tue Mar 21, 2017 1:46 pm

squatch wrote:Both the 1st gen Troopers and '88-'95 Pickups use a mechanical cable speedo from the trans or transfer case. At the cluster is where the pulse signal for the ECM is generated. Gizmo at the cable end. Probably doesn't matter where the pulse comes from as long as you can access the signal and it's the right frequency. They make boxes that can splice into the line and are adjustable. You can match the VSS signal from one side and convert that to what the ecm wants from the other side. I might even still have one around here.


I don't think that will help me. My transmission is from a 2000 Camaro, and it has an electronic VSS in the tailshaft housing. I want this signal to run a speedo in an Isuzu gauge cluster. I assume I will have to modify the signal. As a starting point I am looking for any Isuzu cluster, with an electronic speedo, that will fit in my 1989 pickup dash
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby plaDURTy » Tue Mar 21, 2017 5:32 pm

you should be able to make one from a 93 to 95 Rodeo work
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby carwhisperer » Wed Mar 22, 2017 1:23 pm

Thanks! It seems to me that the cluster might have the same shape for some Isuzus even if the dash looks different. Is that true?
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Re: Best gauge cluster for my 1989 pickup LS1 swap

Postby RickP » Wed Mar 22, 2017 3:40 pm

You probably already know this, but if you decide not to mess with your gauge cluster. There are a couple other options, but they are a bit pricey.
http://www.dakotadigital.com/index.cfm/ ... prd886.htm

http://www.shiftworks.com/tailhousing.htm
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