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electric hi low splitter switch
#1393435 Tue Jan 19 2021 10:40 PM
Joined: Sep 2019
Posts: 35
B
Wrench Fetcher
so im almost finished the rebuild on my sm 420, and i noticed these electrical contacts on my gearshift when i was installing it to test it, being as my other electric switch is somewhat temperamental id like to find the missing piece(s) to use the one in the knob. has anyone found a source for this? my usual guy hasn't ever seen one like it apparently.

Attached Files
IMG_20210118_194035.jpg (91.39 KB, 133 downloads)
IMG_20210118_194043.jpg (45.17 KB, 131 downloads)
Re: electric hi low splitter switch
BorderMechanical #1393487 Wed Jan 20 2021 03:40 AM
Joined: Mar 2004
Posts: 4,875
M
Shop Shark
I've never seen that type of knob/switch combo.

What brand rear do you have? Looks like it's a 2-wire connection...the switch will need to match the electric motor on the rear.

Mike B smile

Re: electric hi low splitter switch
BorderMechanical #1393513 Wed Jan 20 2021 03:04 PM
Joined: Feb 2007
Posts: 105
T
TGP Offline
Shop Shark
That was common switch on mid/late fifties mostly GMC and some Chevrolets with electric two
Speed.

Hard to find, even the push pull are getting hard to locate.

They sometimes pop up on ebay.
Good luck
Tom

Re: electric hi low splitter switch
BorderMechanical #1393549 Wed Jan 20 2021 10:57 PM
Joined: Mar 2004
Posts: 4,875
M
Shop Shark
Tom,

I've seen the Chevrolet vacuum push/pull and the Eaton red knob push/pull switches (https://www.amazon.com/Four-Seasons-35802-Speed-Switch/dp/B000DCNFAM), but never seen the knob the OP has on any Chevrolet TF trucks...must have been a GMC thing...could it be Timkin related?

Mike B smile

Re: electric hi low splitter switch
BorderMechanical #1393561 Thu Jan 21 2021 01:16 AM
Joined: Feb 2007
Posts: 105
T
TGP Offline
Shop Shark
I think Timken electric two speed rears is correct.
I meant to add that to my reply that the trucks I've seen with that switch
Did have Timken rears.

The 58 task force GMC in my signature has that switch only in 5 speed.
Has Timken rears,

Maybe someone has late fifties GMC parts book that can confirm "Switch knob assembly"
with what rear end option and even a GM part# which greatly helps in searches.

Have a spare in my cabinet.
Tom

Attached Files
two speed knob.jpg (12.86 KB, 71 downloads)
Last edited by TGP; Thu Jan 21 2021 01:33 AM.
Re: electric hi low splitter switch
BorderMechanical #1393730 Fri Jan 22 2021 06:02 AM
Joined: Jan 2008
Posts: 4,698
C
Shop Shark
I had a 2 speed shifter on my 1957 550 series. It was a 1998659 which was superseded by a 1998658. They were both obsolete while I had the truck. I replaced them with an Eaton 032861 push pull switch. websearch the Eaton part number and you will find them for sale all over the place. I had a 3 speed Eaton on a 1964 model that used a switch on the gear shift. I found one of them on eBay.

https://photos.app.goo.gl/mahmUXZXExmdnkRq8

I bought a 2 speed shift knob on eBay for one of my 550s quite a while, but they are rare.

Re: electric hi low splitter switch
crenwelge #1394067 Sun Jan 24 2021 06:00 PM
Joined: Sep 2019
Posts: 35
B
Wrench Fetcher
That looks like a good option that Eaton one, I'll have to look into that


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