Some questions for all the trucksperts out there - The 1947 - Present Chevrolet & GMC Truck Message Board Network

K5KRAZIE · 06-16-2003, 02:10 PM

Against my better judgement I have agreed to buy a '67 GMC from a friend (you all know how it is.........one thing leads to another) Any how as I said this is a 1967 GMC 4wd, long bed. However it has a full floater 14 bolt and if I recall correctly a open knuckle Dana 44 with disk brakes, power booster, armstrong steering, a wood floor bed (or the lack there of) even though the badges say six cylinder it has a V8 and 4 speed with a NP205 transfer case.....

So I have actually two questions, the first is that the clutch is not operational. In that you start the truck in gear and then shift without using the clutch as it is useless (I have yet to actually drive it) the mechanical linkage has a ton of washers stacked on to it, but it seems to drive ok, as in it dosn't seem to slip.....we will see.
The next question for all you guys is that this truck has been converted in one way or another, or so it would seem to me. Could my clutch issue be a hiccup in the conversion prosess? I don't want to put a clutch in and one it didn't need it. Or two I'll be doing it again in 3 months.

You guys are the best and thanks in advance.
Now if I could only find a way to shake this they followed me home syndrome......

Pont · 06-16-2003, 03:31 PM

K5KRAZIE, the entire clutch assembly is mechanical and should be easy to follow it's entire operation. I would crawl under it and make sure the inspection cover is pulled off the bottom of the bellhousing. You should be able to see the clutch fork arm and how the throwout bearing makes contact with the fingers on the pressure plate (it should have either the diaphram type or the 3 finger Borg & Beck style). Also while under there checking things out, have someone in the cab slowly pushing down on the clutch pedal. As they do, watch the bellcrank assembly as it moves. It's mounted between the block on the drivers frame rail on a bracket. Odds are, the nylon bushing are severaly worn and you are loosing most of your clutch throw at the bellcrank. I recently pulled my off and rebuilt it with parts still available from GM. Let me know if this helps, I just went through this entire process while doing a tranny/t-case swap in my truck. It's also possible that the clutch pressure plate is defective or needs replaced. Either way, by laying underneath and watching as someone depresses the clutch pedal, you should be able to see full movement of the throwout bearing on the pressure plate.

K5KRAZIE · 06-16-2003, 05:07 PM

Thanks for the heads up on the bushing at the bell crank bro. As soon as I take possetion of this fine ride I will be taking the cover off and taking a look, from the outside it looks to be moving quite a bit so I will see...

OhioDan · 06-16-2003, 05:11 PM

Don't start it while you're underneath. We don't need to loose anyone in a accident.

1969 GMC · 06-16-2003, 07:01 PM

it sounds like pretty much the only original items on that truck are the sheetmetal pieces. but it sounds pretty stout for a trail rig. good luck.

*Gee_Emm* · 06-16-2003, 07:08 PM

What do these 6 cylinder badges look like???

K5KRAZIE · 06-16-2003, 07:20 PM

haha, I figured someone would want to know about those. They are on the front fenders very close to the doors, not where the marker lights would be, but near the trailing edge of the front fenders. I think they have GMC on top in big letters then a bar below with the GMC six cylinder in the bar. I will see the truck tommorrow so I will look......

*Gee_Emm* · 06-16-2003, 09:40 PM

Take some pics too.

K5KRAZIE · 06-17-2003, 02:39 AM

Sure bro, I'll snap some shots.
What do you all think of a hydro. clutch set up?

K5KRAZIE · 06-27-2003, 12:19 AM

Ok the doors have Custom in script on them, and the badages are as I explained before only they also have 2500 in the lower portion. I'll take some pictures of the truck soon. I just got all up into it tonight, steamed out the underside and motor.(not that it made a diffrence but...)
The clutch is totally shot, as is one of the front spring shackles, and steering box.
So correct me if I'm wrong but didn't these come with closed front knuckles and a dana 20 or rockwell transfercase? I'm not 100% sure what the trans. is. It has two PTO covers on either side of it and is mated to a NP 205 t-case. Could it be a 465? Oh and how could I tell if the bellhousing is correct?

Pont · 06-27-2003, 02:09 AM

Ok, the bellhousing is standard for chevy V8 where it mounts to the engine. The trans side of the bellhousing is different depending on which tranny you have. The SM420 trans had a smaller front bearing hub (just under 5" diameter) than the 465 trans (just over 5" diameter I think). The 420 trans will have reverse located towards the driver and back towards the seat. The 465 trans will have reverse towards the passenger side, then back towards the seat. Yes, it should have had a closed knuckle front axle and Rockwell t-case originally. I don't think the NP205 came about until 69 and I'm not sure when they started using the open knuckle frant axle.

Blazer1970 · 06-27-2003, 07:45 AM

If your trans has PTO covers on both sides, and it is married to a 205, it is definitely a 465. Yes, originally the truck would have come with a 420 and a Rockwell case (Dana 20s were used in Blazer / Jimmy only, not in trucks). It also would have had a closed knuckle front, and an Eaton or Dana 60 rear. It sounds like your drivetrain is swapped in from a '73 and up 3/4 ton. You can tell from the BOM on the Dana 44 front axle if you can find a shop with the old books to decode it for you.

*Gee_Emm* · 06-27-2003, 09:10 AM

Do the badges say 2500 or 250? If it is 2500 then it would mean it is a 3/4 ton.

**CPNE** · 06-27-2003, 09:17 AM

The badges would read "GMC" and below it "2500 V-SIX" if it were originally a 3/4 ton with the 306 V6 engine. I have a set of those if you really want pics

K5KRAZIE · 06-27-2003, 06:02 PM

The badges are 2500 V six

I thought the trans was a 465 but I've been messing with the K5s for so long it just all blends together after awhile.

I think the front axle is out of an early model as well, it has the external hubs, but open knuckles. As I said I will be getting pictures of it soon.

oooops I mean

K5KRAZIE · 07-12-2003, 03:39 PM

Here is the badges
http://community.webshots.com/photo/...80891130tHqBjw

And the truck
http://community.webshots.com/photo/...80891083LMTOVH

I'm so hopped up to start working on it! I just have to sell........lol

Class of 69 · 07-12-2003, 04:40 PM

WoW!! You dig right in !!! The ORD spacers....are they a body lift?? You mentioned gaining almost 2". I am intersted in this for installing my BB. I see the front bumper still matches the grill. Where you able to adjust it up to match the pucks?? Your hard work took ten years off the appearance of that truck!! Nice work, and nice rig!

K5KRAZIE · 07-13-2003, 12:27 AM

Well thanks for the kind words '69. I'm sorry to say that the pucks you are refering to went under my K5 recently.
http://community.webshots.com/photo/...48604133nWyOfZ
However the 1" pucks from ORD and poly body mounts did net me almost 2" in some spots. I have yet to reattach the front bumper and make a new rear but I will be doing that as I want the approch and depart. angles to be as high as thay can be.
As for the "new" ride the guy before me updated the drivetrain so all I have to do is the "little" stuff LOL but hay thanks again for the words of encouragement.

06-16-2003, 02:10 PM	#1
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Some questions for all the trucksperts out there Against my better judgement I have agreed to buy a '67 GMC from a friend (you all know how it is.........one thing leads to another) Any how as I said this is a 1967 GMC 4wd, long bed. However it has a full floater 14 bolt and if I recall correctly a open knuckle Dana 44 with disk brakes, power booster, armstrong steering, a wood floor bed (or the lack there of) even though the badges say six cylinder it has a V8 and 4 speed with a NP205 transfer case..... So I have actually two questions, the first is that the clutch is not operational. In that you start the truck in gear and then shift without using the clutch as it is useless (I have yet to actually drive it) the mechanical linkage has a ton of washers stacked on to it, but it seems to drive ok, as in it dosn't seem to slip.....we will see. The next question for all you guys is that this truck has been converted in one way or another, or so it would seem to me. Could my clutch issue be a hiccup in the conversion prosess? I don't want to put a clutch in and one it didn't need it. Or two I'll be doing it again in 3 months. You guys are the best and thanks in advance. Now if I could only find a way to shake this they followed me home syndrome...... __________________ TRUCKS '72 K5 '06 mega dually

06-16-2003, 03:31 PM	#2
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	K5KRAZIE, the entire clutch assembly is mechanical and should be easy to follow it's entire operation. I would crawl under it and make sure the inspection cover is pulled off the bottom of the bellhousing. You should be able to see the clutch fork arm and how the throwout bearing makes contact with the fingers on the pressure plate (it should have either the diaphram type or the 3 finger Borg & Beck style). Also while under there checking things out, have someone in the cab slowly pushing down on the clutch pedal. As they do, watch the bellcrank assembly as it moves. It's mounted between the block on the drivers frame rail on a bracket. Odds are, the nylon bushing are severaly worn and you are loosing most of your clutch throw at the bellcrank. I recently pulled my off and rebuilt it with parts still available from GM. Let me know if this helps, I just went through this entire process while doing a tranny/t-case swap in my truck. It's also possible that the clutch pressure plate is defective or needs replaced. Either way, by laying underneath and watching as someone depresses the clutch pedal, you should be able to see full movement of the throwout bearing on the pressure plate. __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness"

06-16-2003, 05:07 PM	#3
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Thanks for the heads up on the bushing at the bell crank bro. As soon as I take possetion of this fine ride I will be taking the cover off and taking a look, from the outside it looks to be moving quite a bit so I will see... __________________ TRUCKS '72 K5 '06 mega dually

06-16-2003, 05:11 PM	#4
OhioDan Registered User Join Date: Apr 2002 Location: New Carlisle, Ohio,USA Posts: 1,404	Don't start it while you're underneath. We don't need to loose anyone in a accident. __________________ LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class! 1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started.

06-16-2003, 07:01 PM	#5
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	it sounds like pretty much the only original items on that truck are the sheetmetal pieces. but it sounds pretty stout for a trail rig. good luck. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

06-16-2003, 07:08 PM	#6
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	What do these 6 cylinder badges look like???

06-16-2003, 07:20 PM	#7
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	haha, I figured someone would want to know about those. They are on the front fenders very close to the doors, not where the marker lights would be, but near the trailing edge of the front fenders. I think they have GMC on top in big letters then a bar below with the GMC six cylinder in the bar. I will see the truck tommorrow so I will look...... __________________ TRUCKS '72 K5 '06 mega dually

06-16-2003, 09:40 PM	#8
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	Take some pics too.

06-17-2003, 02:39 AM	#9
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Sure bro, I'll snap some shots. What do you all think of a hydro. clutch set up? __________________ TRUCKS '72 K5 '06 mega dually

06-27-2003, 12:19 AM	#10
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Ok the doors have Custom in script on them, and the badages are as I explained before only they also have 2500 in the lower portion. I'll take some pictures of the truck soon. I just got all up into it tonight, steamed out the underside and motor.(not that it made a diffrence but...) The clutch is totally shot, as is one of the front spring shackles, and steering box. So correct me if I'm wrong but didn't these come with closed front knuckles and a dana 20 or rockwell transfercase? I'm not 100% sure what the trans. is. It has two PTO covers on either side of it and is mated to a NP 205 t-case. Could it be a 465? Oh and how could I tell if the bellhousing is correct? __________________ TRUCKS '72 K5 '06 mega dually

06-27-2003, 02:09 AM	#11
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	Ok, the bellhousing is standard for chevy V8 where it mounts to the engine. The trans side of the bellhousing is different depending on which tranny you have. The SM420 trans had a smaller front bearing hub (just under 5" diameter) than the 465 trans (just over 5" diameter I think). The 420 trans will have reverse located towards the driver and back towards the seat. The 465 trans will have reverse towards the passenger side, then back towards the seat. Yes, it should have had a closed knuckle front axle and Rockwell t-case originally. I don't think the NP205 came about until 69 and I'm not sure when they started using the open knuckle frant axle. __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness"

06-27-2003, 07:45 AM	#12
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,507	If your trans has PTO covers on both sides, and it is married to a 205, it is definitely a 465. Yes, originally the truck would have come with a 420 and a Rockwell case (Dana 20s were used in Blazer / Jimmy only, not in trucks). It also would have had a closed knuckle front, and an Eaton or Dana 60 rear. It sounds like your drivetrain is swapped in from a '73 and up 3/4 ton. You can tell from the BOM on the Dana 44 front axle if you can find a shop with the old books to decode it for you. __________________ Tim

06-27-2003, 09:10 AM	#13
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	Do the badges say 2500 or 250? If it is 2500 then it would mean it is a 3/4 ton.

06-27-2003, 09:17 AM	#14
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	The badges would read "GMC" and below it "2500 V-SIX" if it were originally a 3/4 ton with the 306 V6 engine. I have a set of those if you really want pics __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

06-27-2003, 06:02 PM	#15
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	The badges are 2500 V six I thought the trans was a 465 but I've been messing with the K5s for so long it just all blends together after awhile. I think the front axle is out of an early model as well, it has the external hubs, but open knuckles. As I said I will be getting pictures of it soon. oooops I mean __________________ TRUCKS '72 K5 '06 mega dually



Register or Log In To remove these advertisements.

07-12-2003, 03:39 PM	#16
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Here is the badges http://community.webshots.com/photo/...80891130tHqBjw And the truck http://community.webshots.com/photo/...80891083LMTOVH I'm so hopped up to start working on it! I just have to sell........lol __________________ TRUCKS '72 K5 '06 mega dually

07-12-2003, 04:40 PM	#17
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	WoW!! You dig right in !!! The ORD spacers....are they a body lift?? You mentioned gaining almost 2". I am intersted in this for installing my BB. I see the front bumper still matches the grill. Where you able to adjust it up to match the pucks?? Your hard work took ten years off the appearance of that truck!! Nice work, and nice rig! __________________ 69 GMC K10 ..some restoration required....still..

07-13-2003, 12:27 AM	#18
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Well thanks for the kind words '69. I'm sorry to say that the pucks you are refering to went under my K5 recently. http://community.webshots.com/photo/...48604133nWyOfZ However the 1" pucks from ORD and poly body mounts did net me almost 2" in some spots. I have yet to reattach the front bumper and make a new rear but I will be doing that as I want the approch and depart. angles to be as high as thay can be. As for the "new" ride the guy before me updated the drivetrain so all I have to do is the "little" stuff LOL but hay thanks again for the words of encouragement. __________________ TRUCKS '72 K5 '06 mega dually

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Register or Log In To remove these advertisements.