CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Dually axles through the years....?

Going through the same issue with my 84 d70hd. I'm not too worried about breaking the carrier but I still have to count the splines. If things look correct I may run a lock rite. Not sure if this will work for the hd

Screenshot_20211111-103748_DuckDuckGo.jpg
 
I just don't want the locked all the time except hard surface corners thing myself.
Otherwise I'd just go Detroit and be done.
I think it'd be cheaper to convert to a different axle with a stock g80 than buy a selectable.
I'd be all cool with the selectable if they weren't like $2k now lol.

Really, I don't know if I'll even need to worry about mine now.
My grandpa passed yesterday :frown and I might be getting his truck.
If I do I may sell my dually.
Technically my dually doesn't legally have a high enough tow rating to tow my 4x on my trailer anyway. Which is crazy to me.
My '15 half ton had a higher tow rating lol.
 
I get it. Sorry to hear about your grandpa. Do you mean the registered gvwr? Not sure how it is where you are but that doesn't seem to make sense. Kinda what a dually is for right?
 
I did a couple Google searches and came up with 8500# for an 85 C30 dually. :dunno:
 
Could always get a Ferd Super Duty dually rear axle. My '99 F350 has a Dana 80 4:10 gears cuz it has the camper package and a factory clutch style limited slip. Not sure on the width. You would need to do something about the metric bolt pattern. Disc brakes with internal park brake and fits 16" wheels. Most common is 3:73 but I have seen a 6.0L powerstroke dually with 4:10 gears also.
Edit: quick Google search says 72" width. Mines got 295/75R16 tires on oem 6" wide wheels with 2" spacers between and sits right about 100" wide overall.
 
Sorry about your grandpa. GVWR or GCWR doesn't matter much unless you get way over or commercial. My Ferd is GCWR of like 17k and when I'm loaded with my toy hauler I'm more like 21-23k.
 
I did a couple Google searches and came up with 8500# for an 85 C30 dually. :dunno:
That is not towing capacity.
And I think there's something wrong there.
A 3/4 ton pickup is 8500 gvwr.
The dually one ton rear axle weight rating is 8500. Gawr.
Total is usually 9500 or 10000 .

Gcwr, or gross combined weight rating is what you want, that is combined with the trailer.
 
In 85 3/4t were between 6600 and 7200 gvw for conventional cab.
3/4t HD and bonus cabs were 8600 gvw
1t were between 9000 and 10 k gvw regardless of cab configuration, dually rear axle, or engine.
There are no listed GCWR or towing numbers in the brochure.

image.jpg
 
Mines the camper special so 10000# gvwr.

But that's not tow capacity. I'll look it up again see if I can find a link.
 
So there's an 800# difference between it and my '15 half ton lol. It was 9200#.
Trucks have come a long way.
 
So there's an 800# difference between it and my '15 half ton lol. It was 9200#.
Trucks have come a long way.
No, advertising has come a long way.
The trucks could always do more but companies now want to attract more people so they raise the numbers.
Braking has improved a lot and suspensions have gotten better so they can do that easier now.
People back home always loaded and towed with these trucks more than double the official limits, but we call those people crazy.
Now we do it with the newer trucks and we are fine
 
Surprisingly my grandpa's f350 is only rated at 14k. Not as much difference as I thought it would be.

And it's 4x4 so I should be able to back my trailer into it's spot without worry.

Main reason I wanted a locker or something in my dually is that I have to back up a semi steep gravel coated road then into a gravel driveway, to get my trailer where it will be going. So far with just the trailer I didn't have a lot of problems even though it does spin some occasionally. But if my blue truck was on it I may have a problem with a one legger. :dunno:
 
Last edited:
I had a 1980 k30 factory " trailer towing special " and from what i have seen it was a 1 year only at 12,000 gvw . And it was a single wheel truck .
 
What I found surprising was on the Chevy chart I posted, the regular cab 3/4 ton actually has a higher tow rating than it's 1 ton equal counterpart in some cases.

Screenshot_20211112-104128.png
 
Do t forget today's trucks are also very heavy improving braking traction as well so also raising the towing capabilities. Iirc my '14 silverado with double cab and only an aluminum 4.3L 6 cyl weighs close to 6k and can tow close to 8k. Pretty amazing and I probably wouldn't push that but after all this 6 cyl makes more power than the old 8 cylinders offered at the time.
 

This is one of the newer van dually 14 bolts. I think the vans are still 8 on 6.5” pattern. It will have 4” axle tubes.
 
Top Bottom