dayna 44 or 10 bolt front diff? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tomtuna1978 · 07-08-2009, 01:16 AM

hay guys ... when did gm start puting the 10 bolt in the front ? ive got a 79 gmc and it looks like a 10 bolt up front ? i thought it was in the early 80s they started it ....

Blazer1970 · 07-08-2009, 05:45 AM

Starting in '77 or '78 model trucks there was a mix of 10 bolts and D44s. By '81, they were all 10 bolts.

**jerry moss** · 07-08-2009, 09:16 AM

my 77 blazer has a 10 bolt front. my dad bought it from the original owner so i assume it came there from the factory.

Beelzeburb · 07-08-2009, 09:33 AM

They're pretty easy to tell apart. Either it has "44" cast into the webbing on the diff center section or it doesn't.

LONGHAIR · 07-08-2009, 07:11 PM

This is one of the biggest cross-overs that I know of......I don't know if it had to do with availibility or what, but pretty much 77-78 model years could have had either.

tomtuna1978 · 07-08-2009, 07:56 PM

yep its a 10 bolt ! ... they are just as strong as the dana rite ?

84 400 · 07-09-2009, 01:57 AM

My 77 K10 has the cooperate 10 front. 77 was the change over year. From everything i have read they are about the same strength wise. I have had it put to me this way.......... It is not worth the time to swap a 10bolt out for a 44. I have heard the 44 is a little stronger but not enough to make a huge difference. This is all 1/2 ton stuff by the way. I have pushed my 10bolt pretty good on the trails andit has not let me down yet. true it is on 31's but i can go everywhere the jeeps on 33's go. I am lifting mine 4 inches and swiching to 33's so we willl see how the 10bolt holds up. HHonestly tho I feel it is better to wheel it and break it then upgrade. And if i ever really bust the 10 bolt i am going D60 14bolt anyhow

Again I don't have expedience with the chevy 6 lug dana 44's just what i have read around the net

07-08-2009, 01:16 AM	#1
tomtuna1978 Registered User Join Date: Apr 2009 Location: Bend,Oregon Posts: 225	dayna 44 or 10 bolt front diff? hay guys ... when did gm start puting the 10 bolt in the front ? ive got a 79 gmc and it looks like a 10 bolt up front ? i thought it was in the early 80s they started it ....

07-08-2009, 05:45 AM	#2
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,507	Re: dayna 44 or 10 bolt front diff? Starting in '77 or '78 model trucks there was a mix of 10 bolts and D44s. By '81, they were all 10 bolts. __________________ Tim

07-08-2009, 09:16 AM	#3
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,946	Re: dayna 44 or 10 bolt front diff? my 77 blazer has a 10 bolt front. my dad bought it from the original owner so i assume it came there from the factory. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA

07-08-2009, 09:33 AM	#4
Beelzeburb Devil's in the Details Join Date: Sep 2008 Location: Southern Utah Posts: 353	Re: dayna 44 or 10 bolt front diff? They're pretty easy to tell apart. Either it has "44" cast into the webbing on the diff center section or it doesn't. __________________ '70 K10 Suburban - TBI 454, 4L80E, NP241C, Dana 60 & 44 - The 10+ Year Project Thread Datsun 240Z, 510 2 door and an old Honda motorcycle

07-08-2009, 07:56 PM	#6
tomtuna1978 Registered User Join Date: Apr 2009 Location: Bend,Oregon Posts: 225	Re: dayna 44 or 10 bolt front diff? yep its a 10 bolt ! ... they are just as strong as the dana rite ?

07-09-2009, 01:57 AM	#7
84 400 Sb 400 club Join Date: Nov 2005 Location: NH / MA Posts: 2,746	Re: dayna 44 or 10 bolt front diff? My 77 K10 has the cooperate 10 front. 77 was the change over year. From everything i have read they are about the same strength wise. I have had it put to me this way.......... It is not worth the time to swap a 10bolt out for a 44. I have heard the 44 is a little stronger but not enough to make a huge difference. This is all 1/2 ton stuff by the way. I have pushed my 10bolt pretty good on the trails andit has not let me down yet. true it is on 31's but i can go everywhere the jeeps on 33's go. I am lifting mine 4 inches and swiching to 33's so we willl see how the 10bolt holds up. HHonestly tho I feel it is better to wheel it and break it then upgrade. And if i ever really bust the 10 bolt i am going D60 14bolt anyhow Again I don't have expedience with the chevy 6 lug dana 44's just what i have read around the net __________________ 1984 chevy c10, built 400sb,.(SOLD) 77 K10 Project / daily driver "The Grinch" http://67-72chevytrucks.com/vboard/s...d.php?t=318363 1956 Willys Wagon (327 chevy) Project (Now Buick 225) 1980 Corvette L-48 4 speed 1992 Mustang GT built 5.0 5 speed 1985 C10 LWB Sold 1982 K10 SWB plow truck Parted out 1986 D30 M1028 fire brush truck Parted out Last edited by 84 400; 07-09-2009 at 02:09 AM.

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