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Late style moonie gauges. They are definitely easier to read than the early style moonie gauges.

It is! I'm trying my best to give this old truck all the best factory options from throughout the production run. Thanks for stopping by!

It certainly is!

The 92-94 cluster pigtail has 'fingers' on the plug. The early style dashes will work in the later years, but you will have to cut out the opening for the plug some. Just take your time doing it. If you search GMT400 dash swap or other similar phrases, you should be able to find some pictures of it. There's an individual in one of the forums, who did exactly what you're looking to do.

@@WesleyJohnsonMI@ amigo! If truck its already swapped! 89 gmc, Can i ignore the drac? If using 94 cluster!? Just by running the tach and soeed wire to ls pcm? Correct?

Yup, 4 different Borg Warner cases, with a couple of different configurations for the K3500 trucks & NP241C & NP208c transfer cases for the K1500 & K2500 trucks. Not just longer either, the whole case is considerably larger. The Borg Warner case just dwarfs the New Process case.

They should bolt up to the TH400, with the proper transfer case adapter. The TH400 & 4L80E share the same output shaft size. The TH350 shares the same (smaller) output shaft size as the 700r4 & 4L60E and will not work with the Borg Warner transfer case. Remember, the Borg Warner cases need a switched power for the clutch pack.

Thanks! I'm still constantly learning new things about this era of trucks. Yeah, the size difference is kinda mind blowing! Gotta work so I can keep putting money into my projects!

👍

Yeah, they stopped using cables with the square bodies. Check the grounds near the thermostat housing and the plug behind the ashtray. I have a video titled 'fixing a bouncing speedometer' in one of my playlists. It'll either be in the 1992 K1500 or the GMT400 playlist. Be sure to read the comments, I've helped a couple of others out with their problems.

I still own it. It's sitting out back waiting on time, money & ambition. There's a whole playlist on my channel dedicated to this truck.

I've seen (and bought) machines in a lot worse shape. But the key thing is, that it was maintained. They even went as far as turning the pins & bushings in it. I do too. Those old machines definitely beat you up through out the day. Most operators won't even run a machine if it doesn't have a cab with heat & a/c.

It's very much both! He's excited to get it running & put back in service. Thanks!

Thanks! Outage season has kept me busy. Not too concerned about the undercarriage right now. It's not going to be used much. I do have some old Caterpillar literature about refurbishing undercarriage with weld build up. But that's down the road. I'm glad that it got saved too. The machine is actually in pretty good shape considering what it's been through. The new owner is definitely excited about it.

They've got a bunch of good songs. I'm glad that I found them.

Never tried it, most people want a factory tach dash. The biggest problem is going to be the drac/vssb. The moonie gauges are built in internally to the cluster, where the '92-'94 are external.

If memory serves me correctly, it's around 150 gallons.

@@WesleyJohnsonMI Thats more than I thought. I'm about to bring one home any time now that has sat for 8 years and had no oil when I bought it. Changed a couple of hoses, put a cylinder back together and fixed a few other things. It's about ready to fire up and try out before getting it on a truck.

@@be2570w gotcha. Yeah, the H875 has quite the reservoir. The H560 will obviously be smaller. There are 3 magnetic pickup screens on the passenger side, in a tank just below the pumps. There's a plate that unbolts from the bottom. I'd clean that out before filling the system. Does yours have a 4-71 detroit or a cummins in it?

@@WesleyJohnsonMIThanks. I'll look for the plate. It has a 4-71

Bought mine off of Amazon. Do a Google search for Kohler CH20 fuel pump. Should be able to get a part number that way.

Yes, I am a Steamfitter. What about yourself?

It's a hoss for sure! I can pass everything but a gas station! 🤣

No, the '94 & prior clusters only go to 5,000 RPM. I *think* the '95 is also 5,000 RPM (because it's still TBI, but has the round dash) and the '96 & newer are 6,000 RPM.

@@WesleyJohnsonMI Dang

I don't recall off hand. Look in my playlist for the one titled GMT400 info, there is a video linked to another gentleman, who does an excellent job explaining the wiring pin out, with links to schematics.

Ebay, market place or junkyards. You're going to pay a premium for them. Good luck.

Check out my video on how to polarize a welding machine. If that doesn't work, I do have another video on some troubleshooting for this particular machine. I do recommend downloading the owner's manual. It's free & does have a troubleshooting guide in it. What's the voltage at the 120v plug when it's on high idle? You might want to consider cleaning the comutator where the brushes contact it. They sell a comutator stone for this purpose, it's around $10. DO NOT use sand paper to do this, it'll be an expensive fix if you do.

Check the fly wheel magnets behind it age in time I replaced mine all golden that and the bridge rectifier 10$ item

Yes it should. I've never dealt with one of these trucks with a standard transmission, so I can't say for 100% certainty.

Does the fuel gauge work backwards or is it shorting to ground?

Okay, the 7.50x20 tires are more than likely the correct size for that truck. You can run 8.25x20 on it and probably the 9.00x20 tires. Just remember that you can't mix & match tire sizes on a drive axle. As far as running a 22.5 radial tire, the appropriate size should be a 9r22.5, that should be about the same size as a 9.00x20. I would recommend confirming this with a tire shop. If you have the clearance, you can run a 11r22.5, which is a taller tire. Your front axle fender/frame clearance will be the determining factor. As far as the speedometer is concerned, there is usually a 5% discrepancy in the actual speed. So that works out to about 2.5mph +/- this happens because of the available drive & driven gear ratios for the speedometer. Also there might be a ratio multiplier attached to the back of the speedometer. This device helps to get the speedometer to a closer/more accurate reading than what the drive/driven gears can. They come in different multipliers I.E.: 1.06, 1.12, 1.20 etc. You will never find a 'perfect' combination, just something close.

Yes, should be the same from 88-98.

It has four 200mfd, 150vdc capacitors. These are obsolete from Lincoln and the parts list shows a kit(S18696-A) for replacement that has only one capacitor. This kit is also obsolete. I've searched online looking for replacement 200mfd 150vdc capicitors and didn't find any with screw terminals. I have found a 800mfd 150vdc from Lincoln, part number S13490-114. The single 800mfd will be an appropriate replacement for the four 200mfd capacitors. Most of that text is taken from two different posters on welding web. There are several good rebuild threads on that site, that go into great detail and have plenty of part numbers. I'd link the threads, but my comment will get deleted.

That's correct, you'll need a pigtail, the DRAC module & pigtails for the 92-94 clusters. There will be no glow plug light. Other than that, it should work, minus the tach. What's wrong with your current cluster? Have you tried sourcing a diesel cluster from a newer truck?

@@WesleyJohnsonMI I expect the issue is a cold solder joint. The truck sat for several years and once I started using it again, the speedometer was not working. After several "Fonzi slaps" (which I later found that others had also resorted to) it started working but needed repeated 'adjustments' until I gave up on that (at the time it was working relatively regularly). When it is cooler, it is more likely to work than once the cab warms up. When you say tried sourcing from a newer truck... how new can I go to?

@andywillis1110 'newer' is up to 94 model year. Sorry, I may have had a poor choice of words there. If you haven't already checked, there is a 4 cavity pigtail behind the ashtray. The power wire in that pigtail has a bad habit of melting. It's one 14ga wire & three or four 20ga wires (2 of the wires share a cavity) that go into it. I do have a video on my channel titled 'fixing the speedometer' or something similar to it. I'd suggest taking a look at it.

If you're going from a V6 to a V8, you should be able to put a V8 cluster in it & have it function properly.

I have personally never seen a GMT400 with a mechanical speedometer. I even worked on a 1988 K1500 this past fall & it was electronic. Do you have a picture of one?

Compressed air does help. Choice of filler is up to the user. They both have their positives and negatives. In the end, you can only do so much.

For what it is & what it needs to do, it turned out pretty good. He's happy with it and that's what matters the most.

It turned out fairly well. No filler on this job though. He just wanted it sealed up.

Yes, it was mig welded with 0.030 wire. Wish I would have used 0.023 wire. I could have turned the heat down a lot more. I do have a habit of stick welding most of my projects though 😂

It's not fun, but it's easier to do when you catch it sooner, rather than later. Good luck on your project!

You're right about that! At least it will be sealed up & keep the mud & snow out of it.

Thanks! I'll be glad when this thing is done! Hopefully by the end of the weekend, he'll be driving it.

It's definitely different!

ats4solutions.com/chevrolet-cluster-repair/ is one of the companies that I have found. I haven't used them, so I cannot comment on the quality or price of their work. I ended up just wiring in a '92+ tach cluster into my '91 big block truck.

Thanks! Yeah, I'm not exactly looking forward to doing them! It'll be nice once it's done and over with.

It is! I'll be glad when it's finally done!

Thanks! I appreciate it!

Have you downloaded the appropriate owner's manual for your machine? There's usually a wiring diagram & troubleshooting guide for that particular machine/engine in that manual.

Thanks! That makes two of us! I'm definitely partial to the '90s era of trucks.