M1008 14 bolt upgrade??

[bkwudzhom]

During my Sunday afternoon stroll through a local junkyard I located a '78 chevy crewcab dually. The emblem on the rear cab post stating 3+3 as well as Camper Special 10,000 GVW. Anybody have an idea of the type rear axle this might be. I would assume it is heavy duty and geared low, the spring pack was huge to say the least. It would be an easy steal right now for less than $200. Any Ideas?

 

[doghead]

I doubt it will have 4.56 gears like the M1008.

 

[TheDrip]

It will be a Dana 70. Not really an upgrade from the 14bolt thats already there. Most likely has 4.10 gears. There are two situations where you would really want this rear end though. If you get D60 dually hubs for the front, and run H1 wheels un-recentered, then this is the axle that matches in width. Alternatively, if you need gearing deeper than the 5.38 thats available for the 14bolt, then a D70 would be a good swap.

Basically, 14bolt is a great axle, why are you trying to replace it?

 

[bkwudzhom]

Not trying to replace it. Just located a cheap heavy axle and wondered what could be done with it. I would hate to see it get sent to the crusher if somebody could use it.

 

[POOR WHITE BOY]

A dualley rear will have a wider track than the rear on a m1008 truck. If it is on a cab chassis dualley model it will have a more narrow track.

 

[Crash_AF]

I'd love to have it at $200 for my 1008 so I can convert to Dually, but shipping from Ga to Co would be a b!#&h...

Later,
Joe

 

[12vctd]

Other than gearing deeper for a dana 70 rear a 14bolt is actually a better rear beacuse of the pinion support bearing. The only real drawback to a 14bolt is the yoke.

 

[POOR WHITE BOY]

The newer 14 bolt rears have a 1410 yoke:-d

 

[12vctd]

they also have disk brakes and are great axles, and even the older 14bolt can be upgraded to a 1410

 

[4bogginchevys]

first off the 14 bolt is better than the 70 because of the pinion support bearing

also it was pretty rare to see 70s in chevy trucks anywhere 73-87 so it was probably a 14

If the camper special truck was 2 wheel drive with automatic tranny was most likely 4.10 gears but could have been 3.73s

if you want to use the 70 to make a dually out of your truck u should know the 60 and 70 carriers are almost identical....but thier not. The 70's have bigger axle spiders so a swap from a donor 60 for gears is not possible, you'll have to order a new carrier and 4.56 gears, it would be very expensive

you can make your 1008 more stout by using a slip yoke from a 3+3 like that, rear driveline (1350) and a diff yoke from a old chevy 60 rear on your 60 front and eliminate the 1310 (weak point) in front. Thats what we do to our mud trucks!

I believe the carrier break is 4.10 for flange location on carrier

There also could be a problem of spring perch width on that application

Hope someone can use this info

 

[Crash_AF]

The 1008 and the aforementioned 3+3 dually should have the same 1ton perch spacing.

I know the pros/cons of the 14B/D70 argument, I'm looking to build a CUCV wrecker for moving my junk around, not a mud truck/rock buggy. I want the proper dually width more than anything with the swap.

4.10s would do me fine... a friend of mine with a 1010 needs a military front since his truck was parted before going to GL and has a 4.10 front he will trade me for mine so it would be a zero cost trade, only swap labor.

Anyway, it's still a pipe dream since the truck is on the wrong coast...

Later,
Joe