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Re: 58 viking no brake pedal
BlackViking60 #1394739 Thu Jan 28 2021 05:59 PM
Joined: Jul 2020
Posts: 93
B
'Bolter
Mike, isnt the brownie only a .8x ratio for overdrive? Also for the other 5 speeds i assume i would lose my parking brake as mines on the driveshaft but just for fun whst models would be a bolt in swap with a factory v8 bellhousing?. And the cab swap is alot of work yes, but i measured the frsme up on both trucks and its pracrically identical. So as far as mounting goes i would have to fab up some cab mounts to sit it on there. Then deal with clearancing if necessary i know its not going to be a walk in the park like i wish it was haha.

78b, i never tried centering them besides pumping the brakes while i bled them, i figured that was helping me out but its not too hard for that extra step. I have a few options as far as getting these brakes to work properly again. But the more info i have to start with the better off i am. My main concern was vaccum the v8 i will be swapping in has no vacuum. My rear is a vac 2 spd. I hope i can switch it to electric being a corperate 15k chevy rear, and the hydrovac is very expensive to replace. If i go thst route i can get a 1.5" split master from gm and run a hydroboost unit. That keeps my volume where it needs to be and allows an upgrade on the booster. I have built a few cars with hydroboost and ill never go back to a vac system if i can help it.


THE BLACK VIKING
1958 Viking 60 ~ my new toy hauler

1954 GMC 350 (2ton)
Nick named "BIG UGLY" due to the rust, faded paint, and IMO the ugly flared "mustache" grille surround.

My Current fleet: 1954 GMC 350, 1956 chevy pickup, 1958 Viking 60, 1969 mach 1, 1970 chevelle, 1970 skylark custom, 1971 nova, 1989 mustang GT, 2020 panigale v4.

Keep 'em rollin fellas!
Re: 58 viking no brake pedal
BlackViking60 #1394776 Thu Jan 28 2021 09:23 PM
Joined: Mar 2004
Posts: 5,222
M
'Bolter
Originally Posted by BlackViking60
Mike, isnt the brownie only a .8x ratio for overdrive? Also for the other 5 speeds i assume i would lose my parking brake as mines on the driveshaft but just for fun whst models would be a bolt in swap with a factory v8 bellhousing?.

Yes, most of the Aux Transmissions I've seen have a .8x something OD ratio.

In the early 1960's Chevrolet used the Clark 264VO with OD being 0.80 and by the late 60' they were using the Spicer 6853C with OD being 0.85.

The Aux Trans could be a Spicer 6041 with OD being 0.86, a 7041 with 0.83, a 8341C with 0.84, a 8341F with 0.84 or a 8345F Aluminum Case at 0.84. Note, these are all 4-speed transmissions.

The parking brake should be relocated to the rear of the Aux so if the trans go bumped out of gear the truck wouldn't roll free...

Mike B smile

Re: 58 viking no brake pedal
BlackViking60 #1394812 Fri Jan 29 2021 01:06 AM
Joined: Jun 2011
Posts: 4,198
E
'Bolter
Anything over 6xxx would be too big for our trucks, so, make sure you are looking in that range?

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: 58 viking no brake pedal
BlackViking60 #1394815 Fri Jan 29 2021 01:20 AM
Joined: Jul 2020
Posts: 93
B
'Bolter
Ed by 6xxx do you mean the spicer aux trans numbers?

Also, speaking of that does anyone know where to get one? Im.afraid i have no clue on where to look or what im even looking at as far as aux trans go, also the aux trans does pose a small issue of the speedometer being inaccurate. Which im not even sure how to correct if i go from a 4+2 to a 4+4+2

Mike, as far as i know the clark 5 speeds have an odd shifting pattern isnt 5th where 3rd should be? i have no problems shifting 2 sticks and a rear thats something i could pick up on pretty easily. All this modification is starting to make the cab swap soumd easy haha but im interested in all avenues so i would love more info on all this ive heard others putting aux trans in there trucks so its been done before


THE BLACK VIKING
1958 Viking 60 ~ my new toy hauler

1954 GMC 350 (2ton)
Nick named "BIG UGLY" due to the rust, faded paint, and IMO the ugly flared "mustache" grille surround.

My Current fleet: 1954 GMC 350, 1956 chevy pickup, 1958 Viking 60, 1969 mach 1, 1970 chevelle, 1970 skylark custom, 1971 nova, 1989 mustang GT, 2020 panigale v4.

Keep 'em rollin fellas!
Re: 58 viking no brake pedal
BlackViking60 #1394818 Fri Jan 29 2021 02:00 AM
Joined: Mar 2004
Posts: 5,222
M
'Bolter
Time to start calling the big truck junk yards in your area to see what they have.

I have a stock Chevrolet 2-speed rear with a SM420 mated to a 350 sbc with a 2-barrel carb in my '56 8400 running 10.00x22.5 tires and it runs 65 mph all day long on the interstate with no issues...how fast are you trying to go? Brakes aren't any good much faster than that...

Mike B smile

Re: 58 viking no brake pedal
BlackViking60 #1394828 Fri Jan 29 2021 03:01 AM
Joined: Jul 2020
Posts: 93
B
'Bolter
Mike, i thought 9r22.5 was the largest we could run without the duals rubbing on each other. Dont know why but i did, anywho... its not really as much about the speed per say. 60-65 is probably as fast as i want to take it but i sure would like the keep the rpms as low as i can as my motor makes plenty of tq. Feeding a bbc fuel at 3k(+) would be so inefficient it would cost more to cross the country than it would to pay a transport haha. What rpms are you turning at 65mph? and whats the "high" rear gear in your truck? I think mines mid to high 6's:1 i sure would like to convert it to an electric 2 speed just by swapping the actuators if possible so i dont have to run a vac pump. But im not even sure if i can get one of those either

As far as big truck junk yards im not sure if there are any around me, ive never seen one in my junkyard hunting travels im in MA look there for a spicer aux box i assume


THE BLACK VIKING
1958 Viking 60 ~ my new toy hauler

1954 GMC 350 (2ton)
Nick named "BIG UGLY" due to the rust, faded paint, and IMO the ugly flared "mustache" grille surround.

My Current fleet: 1954 GMC 350, 1956 chevy pickup, 1958 Viking 60, 1969 mach 1, 1970 chevelle, 1970 skylark custom, 1971 nova, 1989 mustang GT, 2020 panigale v4.

Keep 'em rollin fellas!
Re: 58 viking no brake pedal
BlackViking60 #1394829 Fri Jan 29 2021 03:02 AM
Joined: Jun 2011
Posts: 4,198
E
'Bolter
I find it best to go look for oneself, yard guys rarely know what we are talking about, find any excuse to get in yard, look for yourself.

The first number, 6xxx for example, is the engine torque number. 7xxx Brownies are too large for most trucks we are using.

If you get one, make sure to get the shift assembly, rarely do they care.

Ed

Last edited by EdPruss; Fri Jan 29 2021 03:03 AM.

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: 58 viking no brake pedal
BlackViking60 #1394831 Fri Jan 29 2021 03:05 AM
Joined: Jul 2020
Posts: 93
B
'Bolter
Ed, i think the hardest part would be identifying it for me, and knowing what trucks to look in in order to find an aux trans that would work in my 2 ton.


THE BLACK VIKING
1958 Viking 60 ~ my new toy hauler

1954 GMC 350 (2ton)
Nick named "BIG UGLY" due to the rust, faded paint, and IMO the ugly flared "mustache" grille surround.

My Current fleet: 1954 GMC 350, 1956 chevy pickup, 1958 Viking 60, 1969 mach 1, 1970 chevelle, 1970 skylark custom, 1971 nova, 1989 mustang GT, 2020 panigale v4.

Keep 'em rollin fellas!
Re: 58 viking no brake pedal
BlackViking60 #1394837 Fri Jan 29 2021 03:32 AM
Joined: Jul 2014
Posts: 284
1
'Bolter
Look around for tandem axle gas powered trucks. International, Ford, GMC I know all used a Spicer 6031A among other models. Look for the "A" letter. That will give you a 24% under, a direct and 17% over. This was commonly used with a 5th direct 5 speed or a 4 speed like a sm420 or SM465. That A ratio set splits the main box gears nicely. You'll have about a300 RPM drop between gears. Under the grease on the driver's side of the brownie is an ID plate that has the numbers on it.


51 3800 PU, 55 235 (w/cam, headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
Re: 58 viking no brake pedal
1Ton_tommy #1394838 Fri Jan 29 2021 03:41 AM
Joined: Jul 2020
Posts: 93
B
'Bolter
Tommy, any idea what years of trucks im looking for? Generic range is fine. Thanks for the help ill definately start my search. Any idea what the general price range might be on these units? Just so if i find one i dont over pay thanks!


THE BLACK VIKING
1958 Viking 60 ~ my new toy hauler

1954 GMC 350 (2ton)
Nick named "BIG UGLY" due to the rust, faded paint, and IMO the ugly flared "mustache" grille surround.

My Current fleet: 1954 GMC 350, 1956 chevy pickup, 1958 Viking 60, 1969 mach 1, 1970 chevelle, 1970 skylark custom, 1971 nova, 1989 mustang GT, 2020 panigale v4.

Keep 'em rollin fellas!
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