89 GMC Cummins conversion - Page 9 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

COS399 · 06-26-2015, 06:40 PM

Quote:

Originally Posted by 656mx

Awsome build tread! I've read the whole thing like 4 times. Did you ever figure out if it is too high for your fifth wheel? Doing a 24 valve 47re swap in my 91 crew and need to order the lift. It will need to tow a toy hauler in the future and I can't decide between 4 or 6in lift.

Thanks 656mx. No, I never tried pulling the fifth wheel since I have a few other trucks and a few months ago I traded off my fifth wheel for a bumper pull toy hauler. I wanted a 4 inch lift but couldn't locate one fast enough so I just ordered the 6 inch.

Let me know how that 47re works out for you. Do you have a build thread?

656mx · 06-26-2015, 10:30 PM

no build tread yet. Ill start one when I get a little further into it. Going to pull the 6.2 out this week and start building motor mounts.

COS399 · 07-01-2015, 11:05 PM

I had a friend who owns a local body shop put a little elbow grease into shining it up. Not the best photo but a big improvement. I also include a picture from when I first got the truck.

COS399 · 07-01-2015, 11:18 PM

The PO of my International dropped it off yesterday evening. WOO HOO!!

COS399 · 07-01-2015, 11:20 PM

Yes, it's a little rough and needs a lot of TLC.

ryanroo · 07-01-2015, 11:43 PM

That is awesome.... I had a flash of what I would make it into in my head. How cool!

COS399 · 07-04-2015, 04:53 PM

Quote:

Originally Posted by ryanroo

That is awesome.... I had a flash of what I would make it into in my head. How cool!

If I could afford it and had the patience I would definitely let you build it because I know it would turn out awesome.

ryanroo · 10-03-2015, 11:35 AM

Quote:

Originally Posted by COS399

If I could afford it and had the patience I would definitely let you build it because I know it would turn out awesome.

i just re-read this and got a chuckle. what are you saying? haha

COS399 · 10-04-2015, 12:33 AM

Quote:

Originally Posted by Truck Guy99

Just read the whole thing. Great build so far! Keep it rollin

Thanks. We are about halfway through HS Football so I will get some work done on it afterwards. Your not far from my old Stompin' ground.

Quote:

Originally Posted by ryanroo

i just re-read this and got a chuckle. what are you saying? haha

Just saying you do really great work and I would want it done overnight.

**Dieselwrencher** · 07-02-2015, 05:35 PM

The red truck shines nicely now! You're a bad influence.

COS399 · 07-04-2015, 04:54 PM

Quote:

Originally Posted by Dieselwrencher

The red truck shines nicely now! You're a bad influence.

Thanks for the compliment. I'm trying to spur you on to finish your K30.

**Dieselwrencher** · 07-08-2015, 05:07 PM

Quote:

Originally Posted by COS399

Thanks for the compliment. I'm trying to spur you on to finish your K30.

Thanks! After the Longhorn is drivable, and my fence is done at home, I will bring the 76 there and start getting ready. I need to have it drivable before snow flies.

COS399 · 08-31-2015, 11:52 PM

I know you are all tired of hearing this but I haven't really made the time to do any work on the truck. My boy should have his license in March so after his football season is over I am going to have to make some time before basketball starts. The plan is to reseal the transfer case and wire in an OBDII plug.

shopteacher · 09-01-2015, 01:55 PM

You should put that cab on a F450 Super Duty frame like this !

Truck Guy99 · 10-03-2015, 11:06 AM

Just read the whole thing. Great build so far! Keep it rollin

**Dieselwrencher** · 10-05-2015, 09:02 PM

Have fun with foot ball. My work load has not netted me much truck time either.

COS399 · 01-24-2016, 11:21 PM

Sorry for not updating this thread but I sometimes procrastinate and other things have seemed to taken a priority over working on the truck. I am hoping to have the garage cleaned up in the next few days in order to pull it into the garage and get started again.

We are over halfway through basketball season and the boys are still undefeated. We are hoping they will make it to state this year. Here is a pic of one of the projects that I have been wanting to do for the last year and finally got around to doing for the school.

Thanks again for those of you following along.

**Dieselwrencher** · 01-25-2016, 06:58 PM

That's a very cool pair of ball racks! Good luck to your son's team too!

COS399 · 02-29-2016, 11:12 PM

Quote:

Originally Posted by Dieselwrencher

That's a very cool pair of ball racks! Good luck to your son's team too!

Thanks Ryan. Well, Basketball is over and we ended up first in District and third in Division. Our record was 24 wins and one loss IIRC. The one loss kept us from moving on to State from Division. Vehicle will be in the garage by this weekend and I also moved my new storage building where I wanted it and now have a designated wood shop to boot.

MTCK · 03-01-2016, 03:44 AM

Dang that's some serious competition! Bring on the truck updates.

LT7A · 03-19-2016, 07:54 AM

COS, just read the whole thread. Great truck. Cool to see that family is a big priority for you. That new Int'l is killer. Could see just massaging that thing back to life from the wheels on up. Keeping patina but getting mechanicals, wiring, etc. in order. Very cool.

COS399 · 03-20-2016, 11:20 PM

Quote:

Originally Posted by LT7A

COS, just read the whole thread. Great truck. Cool to see that family is a big priority for you. That new Int'l is killer. Could see just massaging that thing back to life from the wheels on up. Keeping patina but getting mechanicals, wiring, etc. in order. Very cool.

LT7A, thanks for following along and your positive feedback. Yes, I have to admit that life revolves around my kid and my projects get pushed back.

The Int'l is just collecting rust for now. I am trying to get a title for it before I touch it. The license plate on it shows 1946 as the last year that it was registered.

I wired in the OBDII plug and mounted it just above the gas pedal underneath the dash. Locating it there kept me from having to extend any of the wires. I am reconsidering dropping the TC and resealing it for now because it seems that my low ATF levels are possibly a result of still trying to fill all the lines and such. As I previously mentioned, these Lokar dipsticks don't extend very far into the pan and therefore it is hard to sneak up on the correct level.

While greasing all the zerk fittings I found that one of my battery ground cables was no longer connected and that would explain why I needed to periodically charge the batteries.

Lastly, I connected the Crank Position Sensor to the transmission controller and I will see if that changes anything.

While it is in the garage I will either make some nerf bars or pull the ones off my PSD and mount them on the GMC. I know my kid wants the ones of the PSD because they say "Smittybilt"on them and Smitty is his nickname.

**Dieselwrencher** · 03-21-2016, 06:11 PM

It sounds like you're making some head way. Every little bit helps. So I've heard. Haha

COS399 · 03-31-2016, 12:53 AM

Here are some updates for those of you still following along. Not sure if the OBD2 plug is wired correctly. When I connect my cheap code reader it shows "No Link." I have tried a few different configurations with no luck. Dawna, at Autoworld, is trying to help me out on this issue.

After crawling underneath the truck I noticed a few of the transmission oil pan bolts were wet. I had to remove the cross member to tighten up the rear pan bolts and noticed that the transmission mount was rubbing up against the pan. A little massaging with a BFH gave me the clearance needed to correct the problem. This probably wouldn't have been an issue with the factory pan.

I repaired the broken transfer case vent, extended the rear axle vent, and in the process of learning more on how to tune the PCS transmission controller. Anyone with a PCS controller on a 4L80E please chime in. Thanks for following.

MTCK · 03-31-2016, 02:42 AM

Looks good. That is a big ass pan.

06-26-2015, 10:30 PM	#2
656mx Registered User Join Date: Sep 2014 Location: dutchess county NY Posts: 60	Re: 89 GMC Cummins conversion no build tread yet. Ill start one when I get a little further into it. Going to pull the 6.2 out this week and start building motor mounts.

07-01-2015, 11:05 PM	#3
COS399 Registered User Join Date: Dec 2013 Location: Northern, MT Posts: 569	Re: 89 GMC Cummins conversion I had a friend who owns a local body shop put a little elbow grease into shining it up. Not the best photo but a big improvement. I also include a picture from when I first got the truck. Attached Images __________________ 1987 GMC R2500 SC 454 T400 1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors

07-01-2015, 11:18 PM	#4
COS399 Registered User Join Date: Dec 2013 Location: Northern, MT Posts: 569	Re: 89 GMC Cummins conversion The PO of my International dropped it off yesterday evening. WOO HOO!! Attached Images __________________ 1987 GMC R2500 SC 454 T400 1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors

07-01-2015, 11:20 PM	#5
COS399 Registered User Join Date: Dec 2013 Location: Northern, MT Posts: 569	Re: 89 GMC Cummins conversion Yes, it's a little rough and needs a lot of TLC. __________________ 1987 GMC R2500 SC 454 T400 1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors

07-01-2015, 11:43 PM	#6
ryanroo Senior Member Join Date: Apr 2004 Location: sw colorado Posts: 2,720	Re: 89 GMC Cummins conversion That is awesome.... I had a flash of what I would make it into in my head. How cool! __________________ 72 K20 12v build 72 K20 "parts truck" A place for your diesel swap questions

07-02-2015, 05:35 PM	#10
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,140	Re: 89 GMC Cummins conversion The red truck shines nicely now! You're a bad influence. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

08-31-2015, 11:52 PM	#13
COS399 Registered User Join Date: Dec 2013 Location: Northern, MT Posts: 569	Re: 89 GMC Cummins conversion I know you are all tired of hearing this but I haven't really made the time to do any work on the truck. My boy should have his license in March so after his football season is over I am going to have to make some time before basketball starts. The plan is to reseal the transfer case and wire in an OBDII plug. __________________ 1987 GMC R2500 SC 454 T400 1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors

09-01-2015, 01:55 PM	#14
shopteacher Registered User Join Date: Apr 2013 Location: Western Montana Posts: 50	Re: 89 GMC Cummins conversion You should put that cab on a F450 Super Duty frame like this ! Attached Images

10-03-2015, 11:06 AM	#15
Truck Guy99 Registered User Join Date: Aug 2011 Location: Elk City, OK Posts: 332	Re: 89 GMC Cummins conversion Just read the whole thing. Great build so far! Keep it rollin __________________ My names Tye. No Chevy right now

10-05-2015, 09:02 PM	#16
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,140	Re: 89 GMC Cummins conversion Have fun with foot ball. My work load has not netted me much truck time either. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

01-24-2016, 11:21 PM	#17
COS399 Registered User Join Date: Dec 2013 Location: Northern, MT Posts: 569	Re: 89 GMC Cummins conversion Sorry for not updating this thread but I sometimes procrastinate and other things have seemed to taken a priority over working on the truck. I am hoping to have the garage cleaned up in the next few days in order to pull it into the garage and get started again. We are over halfway through basketball season and the boys are still undefeated. We are hoping they will make it to state this year. Here is a pic of one of the projects that I have been wanting to do for the last year and finally got around to doing for the school. Thanks again for those of you following along. Attached Images __________________ 1987 GMC R2500 SC 454 T400 1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors

01-25-2016, 06:58 PM	#18
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,140	Re: 89 GMC Cummins conversion That's a very cool pair of ball racks! Good luck to your son's team too! __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

03-01-2016, 03:44 AM	#20
MTCK Registered User Join Date: Dec 2009 Location: Fairbanks, AK Posts: 1,830	Re: 89 GMC Cummins conversion Dang that's some serious competition! Bring on the truck updates. __________________ -Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck

03-19-2016, 07:54 AM	#21
LT7A Registered User Join Date: Oct 2015 Location: PNW Posts: 3,545	Re: 89 GMC Cummins conversion COS, just read the whole thread. Great truck. Cool to see that family is a big priority for you. That new Int'l is killer. Could see just massaging that thing back to life from the wheels on up. Keeping patina but getting mechanicals, wiring, etc. in order. Very cool.

03-21-2016, 06:11 PM	#23
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,140	Re: 89 GMC Cummins conversion It sounds like you're making some head way. Every little bit helps. So I've heard. Haha __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*



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03-31-2016, 12:53 AM	#24
COS399 Registered User Join Date: Dec 2013 Location: Northern, MT Posts: 569	Re: 89 GMC Cummins conversion Here are some updates for those of you still following along. Not sure if the OBD2 plug is wired correctly. When I connect my cheap code reader it shows "No Link." I have tried a few different configurations with no luck. Dawna, at Autoworld, is trying to help me out on this issue. After crawling underneath the truck I noticed a few of the transmission oil pan bolts were wet. I had to remove the cross member to tighten up the rear pan bolts and noticed that the transmission mount was rubbing up against the pan. A little massaging with a BFH gave me the clearance needed to correct the problem. This probably wouldn't have been an issue with the factory pan. I repaired the broken transfer case vent, extended the rear axle vent, and in the process of learning more on how to tune the PCS transmission controller. Anyone with a PCS controller on a 4L80E please chime in. Thanks for following. Attached Images __________________ 1987 GMC R2500 SC 454 T400 1988 Chevy R30 CC DRW 12 valve Cummins NV4500 GearVendors

03-31-2016, 02:42 AM	#25
MTCK Registered User Join Date: Dec 2009 Location: Fairbanks, AK Posts: 1,830	Re: 89 GMC Cummins conversion Looks good. That is a big ass pan. __________________ -Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck

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