How to fit H1's on a SRW truck??

[yellowK20]

I hate to be "that guy" but I've been searching all morning and cant find the thread that talks about swapping hubs around to get the proper WMS to WMS to run H1's on a 14-bolt

 

[yellowK20]

Heres some incentive to answer my noob question!!!

 

[76zimmer]

subscribed for the boobage...

But really Gus. wouldn't the DRW hubs be what you need for them.

I'm sure you've seen it, but I was looking at this when I was going through all the hub stuff a while back.

[FONT=Arial, Helvetica, sans-serif][SIZE=+2]The different types of 14 bolt.[/SIZE][/FONT][FONT=Arial, Helvetica, sans-serif]There are many different 14 bolt axles available, with an almost dizzying array of possible widths, tube OD's, hub types, brakes etc. Fortunately, all are pretty similar, a huge number of parts interchange, and through the power of the internet and Pirate4x4.com we are beginning to catalogue all the available data here.*CAUTION* - With this axle, as indeed with all things "axle" like - there are no hard and fast laws - for every "fact" I shall present, I know there's at least one person out there, maybe many more, who claim they own or know of exceptions. This is very likely true and due to the way in which oem vehicle construction occurs, can not be avoided or completely resolved.What follows is what i believe to be true, or the most correct, information based on the research I have done and the letters I have received from what I judge to be the most reputable sources. Use the data with caution - "your mielage may vary" as they say.14 Bolts can be broken down into 4 broad groups. There is also at least one year break that bring minor changes, but this is in fact far less significant than the "type" of 14 bolt axle in question.[/FONT]
[FONT=Arial, Helvetica, sans-serif]Once again - this article is concerned only with GM 14 Bolt full-float rear drive axles. With that said, the following table attempts to capture the data.[/FONT]

[FONT=Arial, Helvetica, sans-serif][SIZE=+1]Type--Width--WMS-WMS--Tube OD--Thickness-ApplicationsHubs*[/SIZE][/FONT][FONT=Arial, Helvetica, sans-serif][SIZE=+1]Shafts**[/SIZE][/FONT]
[FONT=Arial, Helvetica, sans-serif]SRW [/FONT][FONT=Arial, Helvetica, sans-serif](single rear wheel truck) [/FONT][FONT=Arial, Helvetica, sans-serif]67.5" 3-3/8" / 0.5" Type A [/FONT][FONT=Arial, Helvetica, sans-serif]Type 1[/FONT]
[FONT=Arial, Helvetica, sans-serif]DRW [/FONT][FONT=Arial, Helvetica, sans-serif](dual rear wheel truck) 72" 3.5" / 0.5" Type B [/FONT][FONT=Arial, Helvetica, sans-serif]Type 2[/FONT]
[FONT=Arial, Helvetica, sans-serif]C&C [/FONT][FONT=Arial, Helvetica, sans-serif](cab and chasis truck) [/FONT][FONT=Arial, Helvetica, sans-serif]63.5" 3.5" / 0.5" Type B [/FONT][FONT=Arial, Helvetica, sans-serif]Type 1[/FONT]
[FONT=Arial, Helvetica, sans-serif]Van 70" G30 and G35 Type A [/FONT][FONT=Arial, Helvetica, sans-serif]Type 3[/FONT]


[FONT=Arial, Helvetica, sans-serif]Notes:[/FONT]

• [FONT=Arial, Helvetica, sans-serif]The SRW and C&C axles use the same housings and shafts, with the difference in width being in the hubs. The housings are actuallly identical except for the location of the backing plate flange. Drums & hubs are different, but backing plates, shoes, and wheel cylinders are the same) * The SRW and Van axles use the same hubs, the C&C and DRW axles use the same hubs; Though different, the SRW/Van hubs and the C&C/DRW hubs can be interchanged causing a change to the axles WMS (see pics below) SRW and C&C axle shafts are the same ** Van, DRW, and SRW/C&C axle shafts are all different lengths as follows (long/right side / short/left side):[/FONT]
  • [FONT=Arial, Helvetica, sans-serif]Type 1 - SRW/C&C - 37-5/8" / 31-5/8"Type 2 - DRW - ??[/FONT]
  • [FONT=Arial, Helvetica, sans-serif]Type 3 - Van - 39-3/8" / 33-3/8"[/FONT]
  [FONT=Arial, Helvetica, sans-serif]C&C and dually brakes are the same.In all cases one side axleshaft is shorter than the other; pinions are centered. 1350 appears to be the only available stock pinion yoke.1-tons feature 40.5" perch spacing - whether C&C or pickup, whether SRW or DRW. 3/4-ton is 42.5" spacing. (COUNTER) - The perchs on my C&C measure 36"Wheel studs went metric for the 88-up C/K trucks, and 96-up vans[/FONT]
• [FONT=Arial, Helvetica, sans-serif]Front 60 and rear 14b spindles have the same bearing spacing and same bearing journal sizes. Seal journal is different[/FONT]

[FONT=Arial, Helvetica, sans-serif]The following pics, courtesy of Brawler from the PBB, illustrate the differences between the 2 types of hubs.[/FONT]
[FONT=Arial, Helvetica, sans-serif][/FONT][FONT=Arial, Helvetica, sans-serif]Type A SRW / Van 14 bolt hub[/FONT]
[FONT=Arial, Helvetica, sans-serif]

[/FONT][FONT=Arial, Helvetica, sans-serif]Type B C&C / DRW 14 bolt hub[/FONT]
[FONT=Arial, Helvetica, sans-serif][/FONT][FONT=Arial, Helvetica, sans-serif]Type B hub on right, Type A hub on left[/FONT]
[FONT=Arial, Helvetica, sans-serif][/FONT][FONT=Arial, Helvetica, sans-serif]Type B hub on right, Type A hub on left[/FONT]

 

[yellowK20]

Thanks thats a start!

 

[1976Blazer76]

Friend of mine is running srw Dana 60 front and srw 14 bolt rear and is just running 2" spacers all the way around and doing fine.


As for swapping hubs, you would need to swap srw hubs on a drw axle to go any wider. Hope this helps.

Matt

 

[yellowK20]

I dont want to run spacers, not if I can get the right combo of factory parts to get me where I need to be

 

[1976Blazer76]

I dont want to run spacers, not if I can get the right combo of factory parts to get me where I need to be

In that case, assuming you have a drw 60 up front, get either a drw 70 or 14 bolt and put srw hubs on it. You will be golden.

 

[blazinzuk]

I know a couple guys running stock H1s but they all have 70 dually rears. The 2 guys I know running them on a 14 bolt are both using spacers. It seems to me that one tried to figure it out how to do it and the spacers where the cheaper option

Gee I guess I am no help at all

 

[yellowK20]

I have the ribbed 14-bolt housing with 4.10's and a Detroit I don"t want to change axles


There was thread on CK5 about swapping hubs from axle to axle that made a SRW 14 bolt the same width as a Dually 70 I just can't find it lol



Spacers are the last resort

 

[oldtoyboyd]

Run 14 bolt hubs on a dana 70
http://coloradok5.com/forums/showthread.php?t=109482

 

[yellowK20]

Cool!! what about the brakes?? do you have to swap backing plates too?

 

[thatK30guy]

You run dana 70 hubs on the 14 bolt and it sets the wms the same as the d60 dually.

Not sure if I'm following everyone on this thread.

If you use a DRW D60 and want to run H1's, you need either a D70HD or a newer 14FF from the newer body style trucks with IFS and it won't matter if its 2 or 4wd. The newer 14FF's are the same (or real close) width as a D70HD.

To get the rear tires tracking the same width as a DRW D60, you need to swap on SRW bearing hubs from a SRW 14FF.

If you put on DRW bearing hubs from a D70HD onto a SRW 14FF, then you're putting the 14FF right back to the stock width of a narrow 14FF which also shares the same bearing hubs as a D70HD.

Still want to use H1's? Find a D70HD or a newer 14FF.

Best thing about the D70HD's is that you can go lower in gear ratios than anything a 14FF offers which is either 5.13 or 5.38. The big 70 can go way down to 7.17.

 

[thatK30guy]

Cool!! what about the brakes?? do you have to swap backing plates too?

Brakes is a custom job.

 

[yellowK20]

I dont want or have time to swap in a Dana 70 . spacers may be my only option then

 

[blazinzuk]

I dont want or have time to swap in a Dana 70 . spacers may be my only option then

Honestly Gus spacers aren't a bad option, The two guys I know running them are both running bigger tires. One has 47s the other has 42s, they both checked the spacer bolts quite often at first but neither had a problem. Both were very careful putting them on tightening them down in a pattern and using a torque wrench putting them on.

I also know a guy running spacers on his with stock H1s and 38s on a road going truck. He double checks them when tires get rotated and it hasn't been a problem yet

Also spacers are the quickest option by far

 

[yellowK20]

Spacers will probally be it.


I'm having trouble with my future brother in law.
I traded hid a bunch of Truck parts including a ford 60 for his SAS if he would do the work as I cant cuz I'm up here working. he's more then capable he's just friggin lazy as the day is long . so I'm really stressin getting the lift and tires on the truck and the bugs worked out BEFORE we make the trip .

its gotten to the point I may say **** it and just by some 315-70'16's so I dont have to lift it ( trimming is something I wont allow him to do)

 

[bad larry]

Here are my 3" hubcentric/wheelcentric for H1's, ask for Junior at http://www.motorsport-tech.com/wheel_adapters.html
What truck are you puttin um on? I've been slowly gathering parts for my build and I'm using H1's. For reference the truck as it sits now has 33x13.5x16's on it on 16x9" wheels. With my 3" spacers I will be 1" wider total wms to wms. So it should be just about right not sticking way out (maybe 1/4-1/2" per side) but not gaylord inside the fenders.....
Send me a PM if you have anymore questions, I scratched my head about this topic for a while....

 

[oldtoyboyd]

Not sure if I'm following everyone on this thread.

If you use a DRW D60 and want to run H1's, you need either a D70HD or a newer 14FF from the newer body style trucks with IFS and it won't matter if its 2 or 4wd. The newer 14FF's are the same (or real close) width as a D70HD.

To get the rear tires tracking the same width as a DRW D60, you need to swap on SRW bearing hubs from a SRW 14FF.

If you put on DRW bearing hubs from a D70HD onto a SRW 14FF, then you're putting the 14FF right back to the stock width of a narrow 14FF which also shares the same bearing hubs as a D70HD.

Still want to use H1's? Find a D70HD or a newer 14FF.

Best thing about the D70HD's is that you can go lower in gear ratios than anything a 14FF offers which is either 5.13 or 5.38. The big 70 can go way down to 7.17.

What years newer 14bff have a different width? What width are they compared to the older ones?

 

[thatK30guy]

What years newer 14bff have a different width? What width are they compared to the older ones?

Not sure exactly what years they started but my dad has a '97 K3500 crew dually and its got the wide 14FF.

I'd look under any IFS new body style truck beginning in the '88 years on up and see what shows up under there. I couldn't even tell you what the early years of those trucks would have for rear axles because I'm no expert in those trucks.

 

[yellowK20]

Here are my 3" hubcentric/wheelcentric for H1's, ask for Junior at http://www.motorsport-tech.com/wheel_adapters.html
What truck are you puttin um on? I've been slowly gathering parts for my build and I'm using H1's. For reference the truck as it sits now has 33x13.5x16's on it on 16x9" wheels. With my 3" spacers I will be 1" wider total wms to wms. So it should be just about right not sticking way out (maybe 1/4-1/2" per side) but not gaylord inside the fenders.....
Send me a PM if you have anymore questions, I scratched my head about this topic for a while....

there going on a 91 V3500 SRW I have dually hubs for the front end