Did GM put the Dana 70 in square body trucks? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

arrover · 01-19-2012, 11:45 PM

Did GM put the Dana 70 in square body trucks or was the 14 bolt the only heavy duty axle? If they did, what models and years? Were they only in duallys? Only in 1 tons? I can't seem to find a clear answer of when the D70 was used.

SCOTI · 01-20-2012, 12:00 AM

Quote:

Originally Posted by arrover

Did GM put the Dana 70 in square body trucks or was the 14 bolt the only heavy duty axle? If they did, what models and years? Were they only in duallys? Only in 1 tons? I can't seem to find a clear answer of when the D70 was used.

I have an 89 CC C3500 that came w/the Dana70.

JMS-1 · 01-20-2012, 12:14 AM

i have had a few 1 tons. only the duallys i've had have the 70's, my 78 srw 1ton was a 14bolt .

BigBlocksRule · 01-20-2012, 08:52 AM

My '86 SC dually as the Dana.

80SPORT · 01-20-2012, 09:02 AM

The dana 70 was used in the dually pickups from 73 to 87/91

It was a wide track axle;the 14 bolt GM axle was used on c/k30 cab and chassis and single wheel pickups...also on c/k 20 from 73-80

Chevyman350 · 01-20-2012, 11:40 AM

I also have an 1987 one ton dually, it has a dana 70hd in it.

I have heard that the later crew cab duallies 1988-1991? could be had with a 14 bolt in the dually width (72" wms to wms) which I would like but have yet to find. Can anybody conferm this?
If it was a single rear wheel than from what I have found online and i my junk yard experence the 14 bolt was the only option.

jimbonice · 01-20-2012, 01:30 PM

My '77 crew cab dually has a 70hd.
Posted via Mobile Device

Evil Trailblazer SS · 01-20-2012, 08:37 PM

The duallies all had the 70HD until a weird changeover in 1988 or 1989 where they started using the 14-bolt 72" WMS to WMS version in some of the trucks...We have a few 89-91 single cab dually flatbed trucks at work and all of them have the 14-bolt but I have seen '90 CC duallies with the 70HD.

My '87 CC Dually has the 70HD as well.

Axleman · 01-20-2012, 09:43 PM

All single wheels were 14 bolts
All duallies were either 14 bolt or Dana 70HD

kwin · 01-21-2012, 12:17 AM

X2

arrover · 01-21-2012, 12:04 PM

Great info guys! Thanks alot. I wonder if the 88-91 14-bolt dually axles (with the 72" WMS) could be converted to a single rear wheel with a hub swap? That may be a dumb question.

01-19-2012, 11:45 PM	#1
arrover Registered User Join Date: Sep 2011 Location: NW Arkansas Posts: 291	Did GM put the Dana 70 in square body trucks? Did GM put the Dana 70 in square body trucks or was the 14 bolt the only heavy duty axle? If they did, what models and years? Were they only in duallys? Only in 1 tons? I can't seem to find a clear answer of when the D70 was used.

01-20-2012, 12:14 AM	#3
JMS-1 Registered User Join Date: Dec 2011 Location: alpine ca Posts: 14	Re: Did GM put the Dana 70 in square body trucks? i have had a few 1 tons. only the duallys i've had have the 70's, my 78 srw 1ton was a 14bolt .

01-20-2012, 08:52 AM	#4
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Did GM put the Dana 70 in square body trucks? My '86 SC dually as the Dana.

01-20-2012, 09:02 AM	#5
80SPORT Registered User Join Date: Mar 2008 Location: red deer alberta Posts: 777	Re: Did GM put the Dana 70 in square body trucks? The dana 70 was used in the dually pickups from 73 to 87/91 It was a wide track axle;the 14 bolt GM axle was used on c/k30 cab and chassis and single wheel pickups...also on c/k 20 from 73-80

01-20-2012, 11:40 AM	#6
Chevyman350 Registered User Join Date: Dec 2009 Location: Madison, Wi Posts: 80	Re: Did GM put the Dana 70 in square body trucks? I also have an 1987 one ton dually, it has a dana 70hd in it. I have heard that the later crew cab duallies 1988-1991? could be had with a 14 bolt in the dually width (72" wms to wms) which I would like but have yet to find. Can anybody conferm this? If it was a single rear wheel than from what I have found online and i my junk yard experence the 14 bolt was the only option.

01-20-2012, 01:30 PM	#7
jimbonice Registered User Join Date: Aug 2010 Location: White City, SK Posts: 411	Re: Did GM put the Dana 70 in square body trucks? My '77 crew cab dually has a 70hd. Posted via Mobile Device

01-20-2012, 08:37 PM	#8
Evil Trailblazer SS Big Gulps Huh? Whelp... Join Date: Apr 2010 Location: Reno, NV Posts: 410	Re: Did GM put the Dana 70 in square body trucks? The duallies all had the 70HD until a weird changeover in 1988 or 1989 where they started using the 14-bolt 72" WMS to WMS version in some of the trucks...We have a few 89-91 single cab dually flatbed trucks at work and all of them have the 14-bolt but I have seen '90 CC duallies with the 70HD. My '87 CC Dually has the 70HD as well. __________________ "The Ghost II" - 1987 V30 CC, 14-BFF (2nd Design Heavy Ribbed HD) SRW Conversion, 454/4L80E/205, 6" Springs, 35" Toyo MT's on 17" Classic II's, Full Audio System, Lot of Other Goodies!

01-20-2012, 09:43 PM	#9
Axleman Registered User Join Date: Sep 2010 Location: Capac, MI Posts: 10	Re: Did GM put the Dana 70 in square body trucks? All single wheels were 14 bolts All duallies were either 14 bolt or Dana 70HD

01-21-2012, 12:17 AM	#10
kwin Registered User Join Date: May 2011 Location: Grande Prairie, Alberta Posts: 368	Re: Did GM put the Dana 70 in square body trucks? X2

01-21-2012, 12:04 PM	#11
arrover Registered User Join Date: Sep 2011 Location: NW Arkansas Posts: 291	Re: Did GM put the Dana 70 in square body trucks? Great info guys! Thanks alot. I wonder if the 88-91 14-bolt dually axles (with the 72" WMS) could be converted to a single rear wheel with a hub swap? That may be a dumb question.



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