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OD wiring for T86/R10 combination

Moderator: Mod Squad

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58custom223
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Location: Elk Grove, CA
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OD wiring for T86/R10 combination

Post #1 by 58custom223 » Mon Jun 01, 2015 6:01 pm

After much sourcing, the transmission/OD unit has been rebuilt. Included was replacement solenoid and governor. R&R transmission, new clutch, shortened driveline is all in the plan and will be handled next week, but now I'm thinking about the wiring and operation. The OD relay seems to be really expensive for what it is and I'm not sold I'll ever want the kickdown switch function so will not include at this time.

The factory supplied OD relay is protected by a 30A fuse. Is there a scenario where 30 amps will actually need to pass through? I know the hold in current will be a lot less but want to size wire properly.

My plan is to have a couple of switches included to (1) disengage the OD solenoid when wanting to drop out of OD for accelerating or compression braking on steep grades (I'll be pulling a small trailer) and (2) another switch to bypass the governor for the same reason. Don't want to start freewheeling at 28mph on a backroad downgrade pulling that trailer. Just as soon control that myself.

Anyone sourced a 3rd party relay that worked for them?

Thanks!!
=====
1958 Ford Custom 300 - 223 I6, Fenton split exhaust, BB Distributor, T86/R10 OD (3-on-the-tree), 9" with 3.70:1, 3" drop.
=====

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bubba22349
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Location: Flagstaff, Az. 86005 near the old Route 66

Re: OD wiring for T86/R10 combination

Post #2 by bubba22349 » Tue Jul 14, 2015 3:58 pm

58custom223 wrote:After much sourcing, the transmission/OD unit has been rebuilt. Included was replacement solenoid and governor. R&R transmission, new clutch, shortened driveline is all in the plan and will be handled next week, but now I'm thinking about the wiring and operation. The OD relay seems to be really expensive for what it is and I'm not sold I'll ever want the kickdown switch function so will not include at this time.

The factory supplied OD relay is protected by a 30A fuse. Is there a scenario where 30 amps will actually need to pass through? I know the hold in current will be a lot less but want to size wire properly.

My plan is to have a couple of switches included to (1) disengage the OD solenoid when wanting to drop out of OD for accelerating or compression braking on steep grades (I'll be pulling a small trailer) and (2) another switch to bypass the governor for the same reason. Don't want to start freewheeling at 28mph on a backroad downgrade pulling that trailer. Just as soon control that myself.

Anyone sourced a 3rd party relay that worked for them?

Thanks!!
=====


:hmmm: The Governor is used to control the shift points up and down so by passing it won't really help. You really need just about all the OD parts for it to function properly with the exception of the gas pedal switch. The only way to keep an OD unit from free wheeling (it uses a one way sprague unit) is to disengage the unit completely by pushing the cable Handle in. You would never ever want to use the OD in a steep down grade situation while pulling a trailer with much weight or without its own trailer brakes. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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58custom223
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Re: OD wiring for T86/R10 combination

Post #3 by 58custom223 » Tue Dec 15, 2015 4:02 am

The latest plan, no that the Trans/OD is installed is to build a mechanical engagement system to replace the OD solenoid. I'll post drawings and pics as soon as the process is started.
=====
1958 Ford Custom 300 - 223 I6, Fenton split exhaust, BB Distributor, T86/R10 OD (3-on-the-tree), 9" with 3.70:1, 3" drop.
=====

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bubba22349
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Posts: 9481
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Location: Flagstaff, Az. 86005 near the old Route 66

Re: OD wiring for T86/R10 combination

Post #4 by bubba22349 » Tue Dec 15, 2015 10:15 pm

I wouldn't really recommend doing that, the stock Relay is an excellent design and is very long lasting you can even sometimes find a good used one for a reasonable price. Here is a company (see below link) that I have used for parts before. They carry new OD wire harnesses, and the accelerator floor switch, and they may also have a good used relay. You can also use a Bosh relay as a substitute, it dose need to be one that's suitable for a high load (30 or more Amps) and for continuous use like those used for Head Lights. Good Luck :nod:

http://cgfordparts.com/ufolder/cgcat.ph ... rive+relay
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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58custom223
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Posts: 63
Joined: Tue Jun 24, 2014 12:41 am
Location: Elk Grove, CA
Contact:

Re: OD wiring for T86/R10 combination

Post #5 by 58custom223 » Wed Dec 16, 2015 7:52 pm

I'll keep looking and see what I can find.
=====
1958 Ford Custom 300 - 223 I6, Fenton split exhaust, BB Distributor, T86/R10 OD (3-on-the-tree), 9" with 3.70:1, 3" drop.
=====

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