I'm looking for the Ford part number for the overdrive relay on a 1953 3 speed F100. I have the CD of catalog FD9464 and FD9465. Scrolled through a lot of pages with no luck. Can one of you parts guys steer me to where it is?

 

HI Turnrjr,

The resident expert Number Dummy will probably be here soon to give you the number.

In the mean time here is the part number from C&G that has those relays....expensive ($160)!!!!!

Go to http://www.parts123.com/parts123/yb....age%7EcadefeiB

Type in overdrive relay in th eitem description or part number 8M-6915

If they have them then Dennis Carpenter does too....probably same price. LMC didn't have them and Napa's servers are down tonight.



Good Luck,
J!

 

Thanks Julies. I didn't know they were still available new. You are right, expensive! There is risk buying used electrical part off ebay though.

 

I would be VERY wary of a used relay off e-bay. I would also be wary of someone who says their switch is NOS. There are reasons som eof this NOS stuff was never installed.

Those transmissions were very popular in the 50s. They made the transition into the 12 volt days as well. Finding a 12 volt Overdrive relay is almost impossible. There were a lot of these overdrives in trucks in th elate 50s and 60s. Maybe if you can find a yard that has some of these there may be a relay still in one. The relay for th etruck and the car are the same.

I had one of these in my 55 behind a 65 Mustang 289 and loved it.

Also, I have in PDF files, the five Borg Warner manuals for the overdrive transmission I don't exactly remember what they are but some where close to Operators Manual; Troubleshooting; Wiring; Rebuilding; and, a pint paper on applications and rear ends.

If you would like copies of these, send me a PM with your real e-mail address and I'll send you copies.

J!

 

I wouldn't think getting a 12v relay would be that hard; they used them at least thru '67. My dad had a '67 Country Squire with 289 and 3-sp w/OD. I suspect the functions of the last ones was identical to the early ones.

 

I will be converting to 12V. Somewhere I read that voltage makes a difference for the solenoid but either will work on the governor. What about the relay?
I have the OD apart on the bench for inspection. So far appears to be in good condition. Rock Auto sent me the rear tailshaft bushing and seal. I have a gasket set. I'm trying to deside if I want to do the same with the transmission. There are two minor (I think) chips off teeth but everything moves ok without binding and there doesn't seem to be excessive play. I was thinking I would flush/ clean it well and put it back together. I bought it to swap out for my original 4 speed so I don't know much about it's history. The solenoid came with it but I don't know if it is good. The relay did not. Sandidande GAVE me a new kickdown switch. Julies, I PMed you. Thanks guys.
Bob

 

Having trouble finding the number in the 1948/56 catalog?

I'd give you the page number if I could, but Ford omitted the O/D relay part numbers in error from the 1948/56 truck parts catalog.

There's no listing of them, anywhere...not even a picture.

However, I do have other sources:

B1AZ7A651A .. O/D Relay- 6 Volt / Fits: 1953/55.

No Ford Dealer or obsolete parts vendor has any. * *
---------------------------------------------------
B6AZ7A651A .. Overdrive Relay-12 Volt / Fits: 1956.

> > McDonald's Obsolete Parts in Rockport IN has one = 812-359-4965
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That's it...almost....

* * Studebaker used these same Overdrive Relays.

The 6 Volt relay has been reproduced, dunno about the 12 Volt relay.

Several Studie parts vendors have these parts, here's some websites.

studebakerswest = They have the 6 Volt relay pictured on page 1 of their website. They have reproduced it ($95.00) Phone: 650-366-8787 (CA).

Additional Studie parts dealers = myersstudebaker.com / studieparts.com / studebaker-int'l.com.

Studebaker 6 volt relay part number. 523297

Studebaker 12 volt relay part number: 1545215

These Studebaker vendors will prolly not know the O/D relay is the same as Ford.

(except for Jon Myer of myersstudebaker.com, as he used to be a Ford line mechanic-I've known Jon for over 40 years, Bill Walford knows him too)

How do I know these relays are the same? Because...before I was a Ford partsman, I was a Studebaker/Packard partsman.

Studebaker also used Spicer 44's thru 1966, other parts are the same, also.

 

Thanks Bill. I don't feel so bad now about not finding the number.

 

Interesting about Ford deleting that.......I looked for it for quite awhile too.

Studebaker and Packard Bill! Wow! I used to have a Studebaker Flat hear 6 in my boat. NOw I grafting one of those fender air vents onto the side cowl of my 51 (after cutting and shrinking is down somewhat) to feed my Fresh Aire heater. It's mi fix for deleting the fresh aires duct that was up in the fender - got the tilt front now.

As far as the electrical parts on these, the relays are not interchangeable from 6 to 12 volt systems. Remember the 6 volt was positive ground as well. Most relays aren't (including the horn relay) I used all the 6 volt overdrive electrical parts (relay and solenoid) with a Vol-ta-drop 12 to 6 volt reducer and it worked fine. So, when you convert, you might think about that as an option. The governor is irrelvent to voltage. It is a simple spinning shaft with flyweights on a contact plate that rises up and closes a contact as it spins faster. So it is actually mechanical in nature.

I tried finding a 12 volt relay for about 3 years and I was told that everyone who had the old 6 volt systems and converted to 12 had snatched them up. I'd be interested if you can find one - just to know where to get them.

Julie!!

 

Julie, since the parts catalog doesn't list either O/D relay, I added the one that fits 1956-12Volt.

I know you cannot use 12 volt parts in place of 6 volt parts. Prolly 25% of the old rolling piles of misery I've owned have been 6 volt.

B6AZ7A651A = I found ONE NOS Genuine Ford 12 Volt O/D relay at McDonald's Obsolete Parts in Rockport Indiana -812-359-4965.

I'm sorry I posted the info, I didn't know you needed one. It's possible someone may have bought it already.

 

Hi Bill,

I know you posted this. I read the post and was very impressed. But I think we had an FTE time thing going on because the second half of my reply was in answer to Turnrjrs earlier question about the interchangeability of the electrical parts, not what you had said. I'd be the last person in the world to try and tell you what goes on in a Ford!

But fact is these transmissions were made by Borg Warner - not Ford. And as you so elequently showed us, other car and truck manufacturers, as I'm sure aftermarket/part companies, produced these relays. Pardon my blasphemy, but he doesn't need a "Genuine FORD" relay to make the transmission work.

My impression of his original post was that he needed a part number of the original 6V overdrive relay so he could acquire one! Could be wrong - but that is what my answers were oriented around - getting his system up and running; and, answering questions further in the thread for a later conversion to 12 volt. (6 volt overdrive electrical system will work on a 12 volt system with a Vol-ta-drop if desired)! Answer is yes, but with adaptation.

Good point to the parts guys with the parts on your part! But my phrase, "I'd be interested if you can find one" was a general and generic fauex paux on my part - I should have been more literal. So I'll rephase more correctly for folks who function calcitrantly with exact verbal statements: "I would be interested in finding a vendor who carries new 12 volt overdrive relayS as part of their recurring and regular inventory."

Your source for the 6Volt relays is quite a bit cheaper than the $160 Dennis Carpenter and C&G charge. And I think the questions Turnrjr has asked have been well answered by all concerned.

J!

 

Not stock by any means, but here's an approach others are using to get around the lack of OEM relays:

Borg Warner T-85N Overdrive Wiring Page

 

WOW ROSS!!!!!!

Excellent!!!!!!

J!

 

Is this article implying that T85N's don't use an O/D relay? Hmmm.

Mounted on the firewall of my 1965 F100 is this: C5AZ7A651A .. O/D Relay.

Fits: 1965/67 passenger cars, 1965/72 F100's. All with the T-85N Overdrive.

I've also owned a 1956 Studebaker Golden Hawk, and at least 5 1955/56 Packards with this same trans, all use the same O/D relay.

I've never seen a Borg-Warner T85N without an O/D relay.

 

Me neither.

And the O/D transmission was designed to have that relay - as well you and I know.

But what I'm thinking Ross's article provides is an electrically functional alternative to the one part relay if you can't find it. In other words, all those switches and stuff together perform the function of the relay or actually all together make a "Relay".....really?????!!!!!??? Might be useful to know.

Shoot might just be easier to use the 6 Volt relay you know you can buy readily, along with the 6V solenoid that seem to be everywhere, and use the Vol-ta-drop on a 12 volt vehicle! Mine worked perfectly that way.

"What ever turns ya on" ( no pun intended)

J!