SRW to DRW Understanding

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Shagydelic86

Junior Member
Joined
Oct 30, 2018
Posts
16
Reaction score
3
Location
Olathe, KS
First Name
Reece
Truck Year
1984
Truck Model
C30
Engine Size
454
Hello folks. For those that recall, I was here last summer asking for assistance identifying the truck I eventually bought. It is titled as a 1984 C20. After taking several pictures, talking with the seller, and several people on this forum we came to the agreement that from factory this is a C20 SRW, however, sometime in its early life it was converted to a DRW truck.

With that being said. My question is in regards to SRW/DRW rear axle. Wear they the same? Different lengths? Are hubs the same and did all duallies come with a DRW adapter? This is what I'm working with below. I'm hoping to do Aloca wheels and use a 8 to 10 lug adapter, which would require me to add that to this. Adapter to adapter? Or is this standard for DRW trucks? Is there a totally different axle available?

Thanks for all your help! Look forward to learning as much as I can throughout this build process.

You must be registered for see images attach
 

Craig 85

Full Access Member
Joined
Jan 25, 2017
Posts
3,892
Reaction score
4,039
Location
Nashville, TN
First Name
Craig
Truck Year
1985
Truck Model
K30 SRW
Engine Size
454/TH-400/NP205
I haven't had a dually since the early 90's, but mine did not have those adapters. GM used a retainer ring similar to the one pictured below and used conical lug nuts. Second picture is a GM dually brake drum and hub.

You must be registered for see images attach

You must be registered for see images attach


Here's a thread I found that has some general info for you regarding 14 bolts and hubs.
https://www.gmsquarebody.com/threads/c-c-swap-from-14bolt-rear-headaches.24996/
 

86454k30

Full Access Member
Joined
Oct 16, 2017
Posts
93
Reaction score
140
Location
PNW
First Name
Larry
Truck Year
1981
Truck Model
CHEVROLET
Engine Size
350
Hello folks. For those that recall, I was here last summer asking for assistance identifying the truck I eventually bought. It is titled as a 1984 C20. After taking several pictures, talking with the seller, and several people on this forum we came to the agreement that from factory this is a C20 SRW, however, sometime in its early life it was converted to a DRW truck.

With that being said. My question is in regards to SRW/DRW rear axle. Wear they the same? Different lengths? Are hubs the same and did all duallies come with a DRW adapter? This is what I'm working with below. I'm hoping to do Aloca wheels and use a 8 to 10 lug adapter, which would require me to add that to this. Adapter to adapter? Or is this standard for DRW trucks? Is there a totally different axle available?

Thanks for all your help! Look forward to learning as much as I can throughout this build process.

You must be registered for see images attach

Your truck probably had an arrowcraft kit done on it.

https://arrowcraftproducts.com/
 

nvrenuf

Full Access Member
Joined
Jul 30, 2010
Posts
1,724
Reaction score
1,936
Location
Mobile, Al.
First Name
John
Truck Year
1991
Truck Model
K5
Engine Size
454
I agree, looks like Arrowcraft spacers.

A square body dually pick up would have a 74” wide D70HD, a dually cab & chassis would have a 63” wide 14 bolt.

SRW pick ups had a couple of axles available - an 80’s light duty 3/4 ton would have a semi floater 14 bolt. Heavy duty 3/4 tons and 1 tons use full floater 14 bolts with differences in shock and spring perch placement as well as different size brake packages. These would all be 69” wide.

Do NOT use an adapter on an adapter , this is a recipe for failure.
 
Last edited:

highdesertrange

Full Access Member
Joined
Dec 19, 2013
Posts
1,066
Reaction score
211
Location
kalifornia
First Name
mike
Truck Year
1978
Truck Model
k30
Engine Size
454
x2 no adaptor to adaptor. highdesertranger
 

Forum statistics

Threads
42,116
Posts
909,512
Members
33,611
Latest member
RNFL
Top