Chevy cummins parts

[jmduryea1]

Hey folks I been collecting parts to swap a ‘99 5.9 isb into my 1984 k10 (6” suspension lift and 3” body lift) and can use opinions on if I’m missing anything or better parts to get.

From what I have seen this can be done with k10 lift springs (my truck already has an old super stiff lift kit installed), I have an intercooler ready for it, got a throttle setup from a dodge and I’m hoping it will work because this engine is out of a freightliner mt45.

I have a cummins to th400 adapter, my biggest question is if people have actually used them in 4x4 applications with success because this adapter tilts the transmission a little bit.

I have various starters for the cummins depending on what adapter I settle with.

Throttle cable is taken care of but I’m not sure about TV cable yet

I need a new oil pan and pickup to fit the truck as I’ve seen when using an ISB engine.

I plan to use an oem chevy gas tank, heard mixed opinions on if the filler will take a diesel pump nozzle or not

I have summit engine mounts that bolt to factory mounts on the frame

I got a dodge steering pump/vacuum pump

KDP is fixed along with new front and rear seals

Basic cheap water fuel separator

I will get a edelbrock fuel pump until I can afford a fass

Yes this truck is on stock axles but 44’s and 14 bolts are impossible to find even traveling a few hundred miles

I am going to get a brothers truck wiring harness and re wire the whole truck

I really want a fuel pressure monitor with an alarm due to the vp44 but I have no idea what to look for when buying one


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[wz7u]

Throttle cable is taken care of but I’m not sure about TV cable yet

I think TH400 uses a switch instead of a TV cable, IIRC.

[jmduryea1]

Throttle cable is taken care of but I’m not sure about TV cable yet

I think TH400 uses a switch instead of a TV cable, IIRC.

Yes sorry I’m fairly new to autos
Cable to a switch for the solenoid. I was just referring to the cable linkage at the carb and didn’t realize they were different.


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[Mr Diesel]

The Chevy gas tank fill necks are small diameter. A standard diesel fill nozzle is larger and will not fit, so you will need to replace your stock fill necks. If you can find a set off a 1980s chevy 6.2 diesel it will be a direct swap. Or you can remove the fill necks and cut/torch the round metal piece inside, which will allow you to fill with a diesel nozzle.

Yes, the TH400 does not use a TV cable. It has an electric kick down switch.

Your VP44 pump NEEDS to have a low fuel pressure light installed. I included a link below, but you can make your own for about half that price with a switch and light from auto parts store. My VP44 has this premade kit, but I put together the same parts for a buddies VP44. Unfortunately I dont remember the part numbers or thread size for the switch I used. Without it you WILL burn up that $1500+ VP44 pump when the fuel pressure drops from a plugged filter or failing lift pump. This light has saved me twice now.
 
https://www.bluechipdiesel.com/products

[JohnnyPopper]

I have a cummins to th400 adapter, my biggest question is if people have actually used them in 4x4 applications with success because this adapter tilts the transmission a little bit.

 Is it just the engine you're replacing, the rest of the drive train original i.e. Trans, Xfer case?

 

[jmduryea1]

I have a cummins to th400 adapter, my biggest question is if people have actually used them in 4x4 applications with success because this adapter tilts the transmission a little bit.

 Is it just the engine you're replacing, the rest of the drive train original i.e. Trans, Xfer case?

Yes sir it’s going to be cummins to th400/np203

At one point the body has been swappped and it was originally a np208/700r4 but the turbo400/203 is what I have to work with. I have tons of room with the body lift but I’m worried about front driveshaft positioning using this oem adapter vs one of those billet adapters from summit or so on.


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[JohnnyPopper]

I can’t say that I’m very familiar at all with Cummins, I thought they were mainly a Dodge product. But if GM used them as well then I’m sure you’ll find the right combo. I do know that they 700r and the TH 400, if they were used in 4 x 4 application, have the same adapter set up into a NP203. Not sure about a np208 adapting the same as a 203.

As far as the front drive shaft, my stock K10 had a double jointed, almost like a constant velocity U joint coming off of the transfer case, down to a regular U joint. So I think that the only thing you can do at this point is to figure out the geometry and see if you are in the 6° range.

Wish I could be more help.


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[jmduryea1]

I will probably end up getting the summit adapter for this build and I’ll keep the cummins adapter for my c10 as it’s 2wd. The adapter comes out of a bread truck so chevy made everything work somehow I just haven’t figured how yet.

I should have mentioned this truck is running and driving with a sbc so it will just be a direct engine swap.

I’ll continue to post my findings/progress here.


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[jmduryea1]

The Chevy gas tank fill necks are small diameter. A standard diesel fill nozzle is larger and will not fit, so you will need to replace your stock fill necks. If you can find a set off a 1980s chevy 6.2 diesel it will be a direct swap. Or you can remove the fill necks and cut/torch the round metal piece inside, which will allow you to fill with a diesel nozzle.

Yes, the TH400 does not use a TV cable. It has an electric kick down switch.

Your VP44 pump NEEDS to have a low fuel pressure light installed. I included a link below, but you can make your own for about half that price with a switch and light from auto parts store. My VP44 has this premade kit, but I put together the same parts for a buddies VP44. Unfortunately I dont remember the part numbers or thread size for the switch I used. Without it you WILL burn up that $1500+ VP44 pump when the fuel pressure drops from a plugged filter or failing lift pump. This light has saved me twice now.
 
https://www.bluechipdiesel.com/products

What’s the pressure required for the injection pump? I have a stock lift pump on the engine and it goes to rubber lines so I imagine it’s pretty low pressure but I’m not sure the edelbrock pump I plan to use will suffice

To be clear I plan to use the edelbrock and the engine mounted lift pump at the same time unless it’s better off getting one single pump that can put out more pressure


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[Mr Diesel]

It must stay above 5 psi at the injection pump at all times. 10-15 psi is ideal.

[Irish_Alley]

let me start with welcome from maryland. lets start with the adapter, you dont need to tilt the trans if you tilt the motor. my setup (was stock before i touched it) 91v3500 crew cab with a 350/4l80e/205. It now has a 5.9/4l80e/205 utilizing the bread van adapter. i used motor mounts that used the GM mounts and locations so it moved the engine back 3" and i had to cut a tad into the firewall and cut 3" off the rear driveshaft and used a longer front driveshaft with no body lift and no suspension lift. fuel tank i removed the tank hose and used a hole saw and made the nozzle bigger, looking back i wish i made it a little bigger due to the high flow nozzles the big trucks use. my truck was tbi so it had fuel pumps in the tank and i wired them to turn on with the oil pressure switch and kept the stock pump setup in the tanks. i didnt run an intercooler as i have a older 12v. your axles are going to be toast within no time so i wouldnt even work on the driveshafts till you upgrade them.

[jmduryea1]

let me start with welcome from maryland. lets start with the adapter, you dont need to tilt the trans if you tilt the motor. my setup (was stock before i touched it) 91v3500 crew cab with a 350/4l80e/205. It now has a 5.9/4l80e/205 utilizing the bread van adapter. i used motor mounts that used the GM mounts and locations so it moved the engine back 3" and i had to cut a tad into the firewall and cut 3" off the rear driveshaft and used a longer front driveshaft with no body lift and no suspension lift. fuel tank i removed the tank hose and used a hole saw and made the nozzle bigger, looking back i wish i made it a little bigger due to the high flow nozzles the big trucks use. my truck was tbi so it had fuel pumps in the tank and i wired them to turn on with the oil pressure switch and kept the stock pump setup in the tanks. i didnt run an intercooler as i have a older 12v. your axles are going to be toast within no time so i wouldnt even work on the driveshafts till you upgrade them.

How did you tilt the engine?

Also what brand mounts did you use?

It looks like I have plenty of firewall room to work with and I can easily fabricate but I am trying to stay as bolt on as possible and they leaves me with very little fan to radiator clearance


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[jmduryea1]

Hey folks I been collecting parts to swap a ‘99 5.9 isb into my 1984 k10 (6” suspension lift and 3” body lift) and can use opinions on if I’m missing anything or better parts to get.

From what I have seen this can be done with k10 lift springs (my truck already has an old super stiff lift kit installed), I have an intercooler ready for it, got a throttle setup from a dodge and I’m hoping it will work because this engine is out of a freightliner mt45.

I have a cummins to th400 adapter, my biggest question is if people have actually used them in 4x4 applications with success because this adapter tilts the transmission a little bit.

I have various starters for the cummins depending on what adapter I settle with.

Throttle cable is taken care of but I’m not sure about TV cable yet

I need a new oil pan and pickup to fit the truck as I’ve seen when using an ISB engine.

I plan to use an oem chevy gas tank, heard mixed opinions on if the filler will take a diesel pump nozzle or not

I have summit engine mounts that bolt to factory mounts on the frame

I got a dodge steering pump/vacuum pump

KDP is fixed along with new front and rear seals

Basic cheap water fuel separator

I will get a edelbrock fuel pump until I can afford a fass

Yes this truck is on stock axles but 44’s and 14 bolts are impossible to find even traveling a few hundred miles

I am going to get a brothers truck wiring harness and re wire the whole truck

I really want a fuel pressure monitor with an alarm due to the vp44 but I have no idea what to look for when buying one


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EDIT: I also have a friend who’s got a k10 with an sm465/np205 who is interested in trading transmissions.

Mostly what interests me is the granny gear and gear drive t case but I have heard people say the sm465 gearing is bad for diesels, any input is appreciated.


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[Irish_Alley]

you need/want a trans with od. if not you probably max out around 50-55 mph. even with OD my top speed is 83 with 4.10 ratios. if i have to rebuild my axles im going with 3.55 like dodge did

[jmduryea1]

you need/want a trans with od. if not you probably max out around 50-55 mph. even with OD my top speed is 83 with 4.10 ratios. if i have to rebuild my axles im going with 3.55 like dodge did

I only need 65 mph max, I’m rural and will mainly be pulling around livestock on county roads until I have 1 ton axles.  I assume my axles are stock ratio which was probably 3.73.

Another note my engine is pretty turned down as far as tuned, rated for like 185 hp and 420ftlbs I think which is why I’m not too worried about these axles for road use.

At some point I will look at 4l80e swaps but I’m keeping things simple and low budget and deal with whatever result I get.


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