What is this? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WORNBRAKES · 11-23-2002, 07:52 PM

Hey guys I was woundering if you could help identify this for me. I just got another parts truck today. A 70 3/4 400 custom camper leaf truck. The option sheet lists H D rear axle and rear leaf. But does not give any more info on the rear. Could you tell me what it is and what the likley gears are. I am debating on weither it will stay or go. I bought the truck for the other options (ps, pb, and ac) but if the rear is worth keeping, I will. Thanks in advance for help.
Mario

WORNBRAKES · 11-23-2002, 07:56 PM

another view

Alexis · 11-23-2002, 07:59 PM

looks liek a newer style 14-bolt, if you want a real rough count on the gear ratio do the spin trick on it. jack it up spin one of the wheels and see hwo many time the yoke turns. wont be perfect but it gives you an idea.

WORNBRAKES · 11-23-2002, 08:14 PM

Thanks Alex. It is not a 14 bolt but is infact a 10 bolt. I will either do that or just pull the cover and count teeth. I just got it today and that is the only mystery I have with it.

**Classic Heartbeat** · 11-23-2002, 09:03 PM

That is a Dana 60 rear end. Probably 4.10 or 4.56 gears. GM put 4.10s under the trucks unless they were Custom Campers, whitch case it probly has a 4.56 or it is a bid block truck, then it would have 3.54 gears. This is just a rule of thumb and by all means is not etched in stone. Also special orders also got the buyer's choice. There should be a tag on one of the rear inspection cover bolts that tells you the gear ratio. Sometimes there is and sometimes not. You could count the teeth on the ring gear then the pinion gear and devide them also. WES www.ClassicHeartbeat.com

Alexis · 11-23-2002, 09:34 PM

shows what i know, hahahaha..........after i did the post i started to think "didn't they put dana 60's on 3/4ton trucks but i wasnt counting on it..

WORNBRAKES · 11-23-2002, 10:21 PM

Thanks Wes. In all the rear ends I have seen, I have never seen a tag. I still have no idea wht they should look like. Maby one day I will buy a truck that has one. I figure I will pull the cover and count teeth. I can inspect the gears so I know if it is worth selling. Thanks again.

No3Fan4Ever · 11-23-2002, 11:51 PM

the parts book i have indicates the axle code should be stamped on the bottom of the left or right axle tube adjacent to the differential housing; it should be three prefix letters followed by five numbers; C-20 series factory ratios listed in this book were 4.10 , 4.56 or 4.57; don't know if this will help

Tim

11-23-2002, 07:52 PM	#1
WORNBRAKES Senior Member Join Date: Jul 2001 Location: Hughesville, MD Posts: 1,350	What is this? Hey guys I was woundering if you could help identify this for me. I just got another parts truck today. A 70 3/4 400 custom camper leaf truck. The option sheet lists H D rear axle and rear leaf. But does not give any more info on the rear. Could you tell me what it is and what the likley gears are. I am debating on weither it will stay or go. I bought the truck for the other options (ps, pb, and ac) but if the rear is worth keeping, I will. Thanks in advance for help. Mario Attached Images __________________ Mario and Mandy Hughesville, MD 20637 69 C10 305/350 71 K5 Basket case 75 K10 Rescue Parting out 77 MG Midget Parting out 15 6.7L Cummins

11-23-2002, 07:56 PM	#2
WORNBRAKES Senior Member Join Date: Jul 2001 Location: Hughesville, MD Posts: 1,350	another view Attached Images __________________ Mario and Mandy Hughesville, MD 20637 69 C10 305/350 71 K5 Basket case 75 K10 Rescue Parting out 77 MG Midget Parting out 15 6.7L Cummins

11-23-2002, 08:14 PM	#4
WORNBRAKES Senior Member Join Date: Jul 2001 Location: Hughesville, MD Posts: 1,350	Thanks Alex. It is not a 14 bolt but is infact a 10 bolt. I will either do that or just pull the cover and count teeth. I just got it today and that is the only mystery I have with it. __________________ Mario and Mandy Hughesville, MD 20637 69 C10 305/350 71 K5 Basket case 75 K10 Rescue Parting out 77 MG Midget Parting out 15 6.7L Cummins

11-23-2002, 09:03 PM	#5
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	That is a Dana 60 rear end. Probably 4.10 or 4.56 gears. GM put 4.10s under the trucks unless they were Custom Campers, whitch case it probly has a 4.56 or it is a bid block truck, then it would have 3.54 gears. This is just a rule of thumb and by all means is not etched in stone. Also special orders also got the buyer's choice. There should be a tag on one of the rear inspection cover bolts that tells you the gear ratio. Sometimes there is and sometimes not. You could count the teeth on the ring gear then the pinion gear and devide them also. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

11-23-2002, 10:21 PM	#7
WORNBRAKES Senior Member Join Date: Jul 2001 Location: Hughesville, MD Posts: 1,350	Thanks Wes. In all the rear ends I have seen, I have never seen a tag. I still have no idea wht they should look like. Maby one day I will buy a truck that has one. I figure I will pull the cover and count teeth. I can inspect the gears so I know if it is worth selling. Thanks again. __________________ Mario and Mandy Hughesville, MD 20637 69 C10 305/350 71 K5 Basket case 75 K10 Rescue Parting out 77 MG Midget Parting out 15 6.7L Cummins

11-23-2002, 07:59 PM	#3
Alexis Member since 2000 Join Date: Dec 2000 Location: Mountain View Ca / Mexico Posts: 7,879	looks liek a newer style 14-bolt, if you want a real rough count on the gear ratio do the spin trick on it. jack it up spin one of the wheels and see hwo many time the yoke turns. wont be perfect but it gives you an idea.

11-23-2002, 09:34 PM	#6
Alexis Member since 2000 Join Date: Dec 2000 Location: Mountain View Ca / Mexico Posts: 7,879	shows what i know, hahahaha..........after i did the post i started to think "didn't they put dana 60's on 3/4ton trucks but i wasnt counting on it..

11-23-2002, 11:51 PM	#8
No3Fan4Ever Running on empty Join Date: Aug 2002 Location: Roanoke, Virginia Posts: 1,033	the parts book i have indicates the axle code should be stamped on the bottom of the left or right axle tube adjacent to the differential housing; it should be three prefix letters followed by five numbers; C-20 series factory ratios listed in this book were 4.10 , 4.56 or 4.57; don't know if this will help Tim __________________ _____________________________________________ Tim We have two rules here at the Rock. Rule #1: No writing on the walls. Rule#2: Obey all rules 70 GMC Sierra Grande "Custom Camper" Longhorn 402 Big Block TH400 PS PB factory AC Posi; 94 Bronco XLT 302, auto;worn out daily driver



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.