Rear end /front end - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bmg · 07-03-2003, 06:50 PM

hey all since search is disable, does anyone know the link to idendity what type of rear end i have....prob common has 10 bolt pattern and is round in the read and up front 10 bots and well from what i have seen is a dana 60...i can't get any numbers off the axels cause of the undercoating (really don't want to scrape it off)

bmg · 07-03-2003, 07:24 PM

here are some pics

bmg · 07-03-2003, 07:25 PM

more

bmg · 07-03-2003, 07:25 PM

...

bmg · 07-03-2003, 07:26 PM

..

bmg · 07-03-2003, 07:28 PM

front end

bmg · 07-03-2003, 07:30 PM

and the Truck....

bmg · 07-03-2003, 07:32 PM

..

FRENCHBLUE72 · 07-03-2003, 07:32 PM

Colorado k-5 has a very nice and detailed print out sheet for all the axle option's in blazer/truck's.

bmg · 07-03-2003, 07:33 PM

...

GMC71k20 · 07-03-2003, 07:38 PM

eaton/corp in the rear, dana 44 up front. very nice truck

bmg · 07-03-2003, 07:39 PM

thanks....... is there anyway to tell the gear ratio without opening it up......gonna have to soon to replace gaskets and change oil out.

**Classic Heartbeat** · 07-03-2003, 07:58 PM

Most likely 4.10 or 4.56. Stock would have been 4.10 unless it is a camper special or ordered otherwise and then it would show the ratio in the glove box sheet. WES www.ClassicHeartbeat.com

bmg · 07-03-2003, 08:02 PM

thanks, its a 72 chassie and 70 cab.... so options are incorrect...Wes any luck on the rear disk brakes for a 3/4 ton 4*4. I called bout a week 2 weeks ago.

bmg · 07-03-2003, 08:17 PM

GMC71k20 you sure its a dana 44 from this link looks like a dana 60... http://differentials.com/catalog/45.pdf

breeh · 07-03-2003, 09:16 PM

It's a D44. I can almost make out the 44 casting in the pumpkin on one of your pics. Additionally, D60's do not use u-bolts but have studs to mount the spring.

Look on that little metal tag on that cover bolt. It should have the ratio.

bmg · 07-03-2003, 09:40 PM

yeah i looked at it a lil closer its a 44-5F on the tag there are 2 sets of #'s the top i can't make out the bottom is 4-09 is that a correct ratio?

breeh · 07-04-2003, 01:52 AM

4:09 would be correct. That means that you should have 4:10's in the rear. For some reason it is a design feature to have the front wheel(s) turning slighty slower than the rears.

Mike C · 07-04-2003, 10:04 AM

Actually, the ratio is a function of the size of the ring and pinion, the case, and other paramters. You cannot get all ratios in all style housings because of those things. Later model trucks with 8.5" 10 bolts have 4.10 in the front, but the Dana works out to 4.09. What it boils down to is that the gear ratio is at least as close as the tire discrepancies height wise. In order to get any net pull of the front over the back like some mud runners do, you would need several percentage points difference. Like 3.90 in front and 4.10 in the rear. But don't do that on the street!

bmg · 07-04-2003, 01:42 PM

alright thanks guys mucho help.. now i gotta figure out how to get better traction on ICE really don't want to go with studded or chains so i suppose i am up ship creek. Willl posi help at all or any lockers (not sure on what these actually do for winter time). If posi will work better what is involved just chaning out the carriers front and back with new ring and pinion?

bmg · 07-04-2003, 01:45 PM

shoot also what ratio is good for the road and a lil speed i can do bout 75mph at 4500rpm from what i remember before spedo went out..just use rmp gage now 15-20 seems to be 25-30mph in 3rd gear and 15 is 15mph in second.

breeh · 07-04-2003, 05:31 PM

Mike C, thanks for the clarification.

bugs4121 · 07-04-2003, 08:18 PM

Thats a great looking truck ............ I am the process of restoring my 72 K20 and was hoping you could possibly post a picture of the emergency Brake cable hangers where it runs from the equalizer to the passenger side and then down the frame the owner before me has it run with plastic ties........thanks

GMC71k20 · 07-05-2003, 02:22 PM

lockers suck on ice

bmg · 07-05-2003, 05:51 PM

here is a diagram out of LMC and some pics from what i have hooked up. I e-brake will only go about one ta two clicks on the pedal so not sure what else i need to do ta get it to work right.

07-03-2003, 06:50 PM	#1
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	Rear end /front end hey all since search is disable, does anyone know the link to idendity what type of rear end i have....prob common has 10 bolt pattern and is round in the read and up front 10 bots and well from what i have seen is a dana 60...i can't get any numbers off the axels cause of the undercoating (really don't want to scrape it off)

07-03-2003, 07:24 PM	#2
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	here are some pics Attached Images

07-03-2003, 07:25 PM	#3
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	more Attached Images

07-03-2003, 07:25 PM	#4
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	... Attached Images

07-03-2003, 07:26 PM	#5
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	.. Attached Images

07-03-2003, 07:28 PM	#6
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	front end Attached Images

07-03-2003, 07:30 PM	#7
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	and the Truck.... Attached Images

07-03-2003, 07:32 PM	#8
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	.. Attached Images

07-03-2003, 07:32 PM	#9
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Colorado k-5 has a very nice and detailed print out sheet for all the axle option's in blazer/truck's. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

07-03-2003, 07:33 PM	#10
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	... Attached Images

07-03-2003, 07:38 PM	#11
GMC71k20 Registered User Join Date: Aug 2002 Location: mass Posts: 1,277	eaton/corp in the rear, dana 44 up front. very nice truck

07-03-2003, 07:39 PM	#12
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	thanks....... is there anyway to tell the gear ratio without opening it up......gonna have to soon to replace gaskets and change oil out.

07-03-2003, 07:58 PM	#13
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Most likely 4.10 or 4.56. Stock would have been 4.10 unless it is a camper special or ordered otherwise and then it would show the ratio in the glove box sheet. 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

07-03-2003, 08:02 PM	#14
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	thanks, its a 72 chassie and 70 cab.... so options are incorrect...Wes any luck on the rear disk brakes for a 3/4 ton 4*4. I called bout a week 2 weeks ago.

07-03-2003, 08:17 PM	#15
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	GMC71k20 you sure its a dana 44 from this link looks like a dana 60... http://differentials.com/catalog/45.pdf



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07-03-2003, 09:16 PM	#16
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	It's a D44. I can almost make out the 44 casting in the pumpkin on one of your pics. Additionally, D60's do not use u-bolts but have studs to mount the spring. Look on that little metal tag on that cover bolt. It should have the ratio. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

07-03-2003, 09:40 PM	#17
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	yeah i looked at it a lil closer its a 44-5F on the tag there are 2 sets of #'s the top i can't make out the bottom is 4-09 is that a correct ratio?

07-04-2003, 01:52 AM	#18
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	4:09 would be correct. That means that you should have 4:10's in the rear. For some reason it is a design feature to have the front wheel(s) turning slighty slower than the rears. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

07-04-2003, 10:04 AM	#19
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Actually, the ratio is a function of the size of the ring and pinion, the case, and other paramters. You cannot get all ratios in all style housings because of those things. Later model trucks with 8.5" 10 bolts have 4.10 in the front, but the Dana works out to 4.09. What it boils down to is that the gear ratio is at least as close as the tire discrepancies height wise. In order to get any net pull of the front over the back like some mud runners do, you would need several percentage points difference. Like 3.90 in front and 4.10 in the rear. But don't do that on the street! __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

07-04-2003, 01:42 PM	#20
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	alright thanks guys mucho help.. now i gotta figure out how to get better traction on ICE really don't want to go with studded or chains so i suppose i am up ship creek. Willl posi help at all or any lockers (not sure on what these actually do for winter time). If posi will work better what is involved just chaning out the carriers front and back with new ring and pinion?

07-04-2003, 01:45 PM	#21
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	shoot also what ratio is good for the road and a lil speed i can do bout 75mph at 4500rpm from what i remember before spedo went out..just use rmp gage now 15-20 seems to be 25-30mph in 3rd gear and 15 is 15mph in second.

07-04-2003, 05:31 PM	#22
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Mike C, thanks for the clarification. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

07-04-2003, 08:18 PM	#23
bugs4121 Registered User Join Date: Nov 2002 Location: Bowie,Maryland Posts: 56	Thats a great looking truck ............ I am the process of restoring my 72 K20 and was hoping you could possibly post a picture of the emergency Brake cable hangers where it runs from the equalizer to the passenger side and then down the frame the owner before me has it run with plastic ties........thanks __________________ -1972 K20 longbed -350 4 Barrel -4 speed

07-05-2003, 02:22 PM	#24
GMC71k20 Registered User Join Date: Aug 2002 Location: mass Posts: 1,277	lockers suck on ice

07-05-2003, 05:51 PM	#25
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	here is a diagram out of LMC and some pics from what i have hooked up. I e-brake will only go about one ta two clicks on the pedal so not sure what else i need to do ta get it to work right. Attached Images

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