New guy here "66 4x4 sort of - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rgtrough · 12-29-2015, 06:47 PM

Hey guys, new to the forum but not forums. I just purchased a 1966 4X4 C10.
Yes I know. The first letter of my serial number is C not K. Thats ok the build appears to be done well. It is a 292 4 speed. This is a very solid truck. Cab, bed, frame, and driveline in very nice condition. My question for youall is about the transfer case. It only has hi (all the way up) and low (all the way back). Any idea what unit this is? Part or model numbers? Years in production?
any and all useful information is greatly appreciated.

RANDY COX · 12-29-2015, 07:41 PM

if it's original I think it's a Rockwell T-221 I'm sure the experts will chime in.

RANDY COX · 12-29-2015, 07:45 PM

Oh BTW welcome to the site and we need to see pixs, cause we all lik'em.. My truck is a 64 on a 70 4x4 frame and running with a 292 and 4 spd to...

j.kirn · 12-29-2015, 09:28 PM

Pics of transfercase would help indentify it.

TJ's Chevy · 12-29-2015, 09:34 PM

X2 on pictures! And welcome aboard!

rgtrough · 12-29-2015, 10:50 PM

Hey guys, thanks for the replies. I will be happy to post pictures as soon as I learn how. I don't have any photos of the truck on my computer yet.

rgtrough · 12-30-2015, 01:15 AM

Hey guys, Is the t221 a constant supply transfer case? Because the one I have is.

'63GENIII · 12-30-2015, 01:47 AM

Welcome to the sickness! Not sure what you mean by "constant supply" but one identifying feature of the 221 is that the rear output is in line with the front output with the input shaft located above both of them. Most modern TCs have the rear output inline with the input shaft. Pics would be great when you get a chance to post!

rgtrough · 12-30-2015, 09:28 AM

By constant supply I mean the front driveshaft turns when ever the truck is moving. No four wheel high, four wheel low, two wheel high.
Posted via Mobile Device

rgtrough · 12-30-2015, 09:30 AM

I will take some pictures today. That is if the sun ever comes up.
Posted via Mobile Device

rgtrough · 12-30-2015, 09:41 PM

Quote:

Originally Posted by rgtrough

I will take some pictures today. That is if the sun ever comes up.
Posted via Mobile Device

Posted via Mobile Device

rgtrough · 12-30-2015, 09:43 PM

Quote:

Originally Posted by rgtrough

Posted via Mobile Device

**Classic v6 GMC's** · 12-30-2015, 09:59 PM

Quote:

Originally Posted by rgtrough

Posted via Mobile Device

That is the Rockwell T-221

It should have 2 HI, 4 HI, N, 4 LO

rgtrough · 12-30-2015, 11:20 PM

Quote:

Originally Posted by Classic v6 GMC's

That is the Rockwell T-221

It should have 2 HI, 4 HI, N, 4 LO

Where is the shifter position for 2 wheel hi?
Posted via Mobile Device

**Classic v6 GMC's** · 12-30-2015, 11:32 PM

Quote:

Originally Posted by rgtrough

Where is the shifter position for 2 wheel hi?
Posted via Mobile Device

All the way forward I think.
Look at this thread post #7
http://67-72chevytrucks.com/vboard/s...d.php?t=454325

rgtrough · 12-30-2015, 11:49 PM

Quote:

Originally Posted by Classic v6 GMC's

All the way forward I think.
Look at this thread post #7
http://67-72chevytrucks.com/vboard/s...d.php?t=454325

Thanks for the reply. The thread shows 2 Wheel Dr. all the way towards the dash. In this position when I disengage the clutch the driveshaft going to the front differential turns.
Posted via Mobile Device

**Classic v6 GMC's** · 12-31-2015, 12:06 AM

Quote:

Originally Posted by rgtrough

Thanks for the reply. The thread shows 2 Wheel Dr. all the way towards the dash. In this position when I disengage the clutch the driveshaft going to the front differential turns.
Posted via Mobile Device

Can you find all 4 positions? Maybe someone else will chime in

**allchevy58** · 12-31-2015, 12:44 AM

Are your front hubs in the lock position?

rgtrough · 12-31-2015, 12:50 AM

Quote:

Originally Posted by allchevy58

Are your front hubs in the lock position?

No
Posted via Mobile Device

rgtrough · 12-31-2015, 12:54 AM

Quote:

Originally Posted by Classic v6 GMC's

Can you find all 4 positions? Maybe someone else will chime in

No only all the way forward (2 wd ?) neutral in the middle and all the way back (4 wd lo)?
Posted via Mobile Device

**Classic v6 GMC's** · 12-31-2015, 11:48 AM

Quote:

Originally Posted by rgtrough

No only all the way forward (2 wd ?) neutral in the middle and all the way back (4 wd lo)?
Posted via Mobile Device

Maybe you are in (4 wd hi)? not all the way forward?

VonDog · 12-31-2015, 12:05 PM

This pic is of a 1960 Rockwell T221. I think they're the same. My front was turning too so I had to adjust the stick shift linkage to get it into 2wd

rgtrough · 12-31-2015, 02:10 PM

This pic is of a 1960 Rockwell T221. I think they're the same. My front was turning too so I had to adjust the stick shift linkage to get it into 2wd.

Maybe you are in (4 wd hi)? not all the way forward?

You both were right. This morning I jacked up all 4 corners and ran the truck in all 3 positions, with and without the front axles engaged. I had to use a pry bar to get 4 wd disengaged. Adjusted the linkage and now I have 4 distinct positions. I imagine I never got it to shift out of 4 hi after I tested it. This truck has sat in a garage for the last 7 years, only driven in nice weather.
Thanks to all who replied, you made troubleshooting this proble easier. Now on to the electrical system.

12-29-2015, 06:47 PM	#1
rgtrough Registered User Join Date: Jan 2012 Location: Dayton, Ohio Posts: 38	New guy here "66 4x4 sort of Hey guys, new to the forum but not forums. I just purchased a 1966 4X4 C10. Yes I know. The first letter of my serial number is C not K. Thats ok the build appears to be done well. It is a 292 4 speed. This is a very solid truck. Cab, bed, frame, and driveline in very nice condition. My question for youall is about the transfer case. It only has hi (all the way up) and low (all the way back). Any idea what unit this is? Part or model numbers? Years in production? any and all useful information is greatly appreciated. __________________ peace Bud 1966 C10 4X4 1962 Impala Sport Coupe 1974 Corvette Coupe 1987 Suburban

12-29-2015, 07:41 PM	#2
RANDY COX Registered User Join Date: Mar 2001 Location: RADFORD, VA Posts: 2,651	Re: New guy here "66 4x4 sort of if it's original I think it's a Rockwell T-221 I'm sure the experts will chime in. __________________ 1964 BBC 402 4x4 Last edited by RANDY COX; 12-29-2015 at 07:42 PM. Reason: added wording

12-29-2015, 07:45 PM	#3
RANDY COX Registered User Join Date: Mar 2001 Location: RADFORD, VA Posts: 2,651	Re: New guy here "66 4x4 sort of Oh BTW welcome to the site and we need to see pixs, cause we all lik'em.. My truck is a 64 on a 70 4x4 frame and running with a 292 and 4 spd to... __________________ 1964 BBC 402 4x4

12-29-2015, 09:28 PM	#4
j.kirn Registered User Join Date: Jun 2006 Location: MO. Posts: 970	Re: New guy here "66 4x4 sort of Pics of transfercase would help indentify it.

12-29-2015, 09:34 PM	#5
TJ's Chevy Registered User Join Date: Mar 2013 Location: Southern Oregon Posts: 10,384	Re: New guy here "66 4x4 sort of X2 on pictures! And welcome aboard! __________________ 1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw

12-29-2015, 10:50 PM	#6
rgtrough Registered User Join Date: Jan 2012 Location: Dayton, Ohio Posts: 38	Re: New guy here "66 4x4 sort of Hey guys, thanks for the replies. I will be happy to post pictures as soon as I learn how. I don't have any photos of the truck on my computer yet. __________________ peace Bud 1966 C10 4X4 1962 Impala Sport Coupe 1974 Corvette Coupe 1987 Suburban

12-30-2015, 01:15 AM	#7
rgtrough Registered User Join Date: Jan 2012 Location: Dayton, Ohio Posts: 38	Re: New guy here "66 4x4 sort of Hey guys, Is the t221 a constant supply transfer case? Because the one I have is. __________________ peace Bud 1966 C10 4X4 1962 Impala Sport Coupe 1974 Corvette Coupe 1987 Suburban

12-30-2015, 01:47 AM	#8
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: New guy here "66 4x4 sort of Welcome to the sickness! Not sure what you mean by "constant supply" but one identifying feature of the 221 is that the rear output is in line with the front output with the input shaft located above both of them. Most modern TCs have the rear output inline with the input shaft. Pics would be great when you get a chance to post! __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29

12-30-2015, 09:28 AM	#9
rgtrough Registered User Join Date: Jan 2012 Location: Dayton, Ohio Posts: 38	By constant supply I mean the front driveshaft turns when ever the truck is moving. No four wheel high, four wheel low, two wheel high. Posted via Mobile Device Attached Images

12-30-2015, 09:30 AM	#10
rgtrough Registered User Join Date: Jan 2012 Location: Dayton, Ohio Posts: 38	I will take some pictures today. That is if the sun ever comes up. Posted via Mobile Device

12-31-2015, 12:44 AM	#18
allchevy58 Senior Member Join Date: Aug 2011 Location: Reno, Nv. Posts: 1,437	Re: New guy here "66 4x4 sort of Are your front hubs in the lock position? __________________ 1927 Willy's Knight 24,000 original miles, 1958 Impala 283/Powerglide, 1971 Monte Carlo 350/350, 1972 GMC K2500 350/350, 1976 Chev. K10 350/350, 2006 GMC Sierra 2500HD LBZ Duramax/Allison, 2006 Chev. Silverado K3500 LBZ Duramax/Allison

12-31-2015, 12:05 PM	#22
VonDog Registered User Join Date: Jul 2013 Location: Phoenix, AZ Posts: 348	Re: New guy here "66 4x4 sort of This pic is of a 1960 Rockwell T221. I think they're the same. My front was turning too so I had to adjust the stick shift linkage to get it into 2wd Attached Images __________________ 60 K20, eaton HO52, T221, SM420, Dana 44 closed 78 K20 Burb, 14 bolt, NP205, SM465, Dana 44 open 05 Dodge Ram 2500 5.9 Cummins 4x4

12-31-2015, 02:10 PM	#23
rgtrough Registered User Join Date: Jan 2012 Location: Dayton, Ohio Posts: 38	Re: New guy here "66 4x4 sort of This pic is of a 1960 Rockwell T221. I think they're the same. My front was turning too so I had to adjust the stick shift linkage to get it into 2wd. Maybe you are in (4 wd hi)? not all the way forward? You both were right. This morning I jacked up all 4 corners and ran the truck in all 3 positions, with and without the front axles engaged. I had to use a pry bar to get 4 wd disengaged. Adjusted the linkage and now I have 4 distinct positions. I imagine I never got it to shift out of 4 hi after I tested it. This truck has sat in a garage for the last 7 years, only driven in nice weather. Thanks to all who replied, you made troubleshooting this proble easier. Now on to the electrical system. __________________ peace Bud 1966 C10 4X4 1962 Impala Sport Coupe 1974 Corvette Coupe 1987 Suburban



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