![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Jan 2020
Location: Boulder, UT
Posts: 50
|
1959 Viking 40 6 speed manual
Hey all, I have a mad scheme and some questions. I have a 1959 Viking 40 that currently has a 350 with a gm 6 speed manual transmission??? Can anyone help me identify it? I’m not having much luck.
I also have a 70 K20 with a sbc 350, sm 465 and a np205. I’m in the process of trying to put a 12 valve Cummins in the 1959 and have a mad scheme to swap the sm 465 and put a three speed brownie box (slap shifter, gear splitter) in it so I have 12 gears. If I can I would like to take the 6 speed and put it into the 70 k20 I have. So I was wondering if I could get some help on making sure I’m doing all of this correctly. So, for clarification, I am trying to make a 1959 Chevy Viking 40 with a 12 valve Cummins, SM 465, 3 speed brownie. And a 70 K20 with a 383 stroker, whatever that 6 speed is, and have the divorced NP205 still. Am I crazy? Does this work? Will someone talk to me hahaha |
![]() |
![]() |
![]() |
#2 |
Senior Member
![]() ![]() Join Date: Oct 2014
Location: Eagle, ID
Posts: 3,004
|
Re: 1959 Viking 40 6 speed manual
Flipped it
|
![]() |
![]() |
![]() |
#3 | |
Registered User
Join Date: Mar 2012
Location: Lakes Region NH
Posts: 3,184
|
Re: 1959 Viking 40 6 speed manual
Quote:
Without any more details, I'm thinking the six speed might be a "real" truck transmission much better suited for the torque created by the diesel engine than the SM465. Medium and heavy truck six speeds generally have more gears below 1:1 than light duty transmissions. Many are 1:1 in high gear instead of overdrive. Last edited by 1project2many; 07-21-2020 at 12:41 PM. |
|
![]() |
![]() |
![]() |
#4 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,632
|
Re: 1959 Viking 40 6 speed manual
Post a pic of the trans along with any numbers that might be on it..
But if its currently behind a 350sb then itll fit your 383...
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
|
Re: 1959 Viking 40 6 speed manual
Brownies are unsyncroed so speed shifting is out. That said you can shift them pretty quick with practice. I have a 3spd and a 4spd brownie and both have a low "oil field" 1st gear so that one is not a splitter gear. Some of the hard parts are getting hard to find for the Spicer units but I did find a kit for a Spicer 7041 through SKF that was a hodge podge of bearings and seals from different manufacturers. I love the swap but I would either get a Clark trans or one of the dodge 5/6 spds with OD and make your life simple.
I have rhe 4spd in my dodge 5500 behind a 6spd manual and you definatly would have to want to hit all the gears to use it. When I do use it I just take off in under and work the main into fourth before I start an action on the auxilary. This is only when loaded heavy since the 6.7 will pretty much pull anything with the 6spd. The difference is I can pick the road speed and keep EGTs in check vs running a dictated gear/speed based on the standard gearing. My 51 Mack has a 5x3 but only 9 usable gears. The top 2 are the same and the low hole is 2 something to one so only used to creap. |
![]() |
![]() |
![]() |
#6 | |
Registered User
Join Date: Mar 2012
Location: Lakes Region NH
Posts: 3,184
|
Re: 1959 Viking 40 6 speed manual
Quote:
|
|
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
|
Re: 1959 Viking 40 6 speed manual
Actually alot of guys switch to the ZF in the horse power wars . They are supposed to take a good amount of abuse with a smoother shift. I never liked the ZF 6spd much since it is such a tight pattern I would miss the upshift. I have gotten way to used to the truck feeling shifter gates. The ZFs probably became popular from all the 6.0 Ford to cummins swaps.
|
![]() |
![]() |
![]() |
Bookmarks |
Tags |
chevy viking 40, cummins swap, gear splitter, gm six speed manual, transmission swap |
|
|