I Have 1974 Manual 3speed W/od Trans I Was Wondering If Sombody Could Tell Me What The Name Of The Shaft That The Throw Out Berring Rides On So I Can Find One And Maby A Part Number
The One I Have Is Broke
Thanx Paul

 

It's actually called the front bearing retainer but I've also heard it called the input shaft housing.

 

If you have overdrive in a 1974 truck, it was swapped in, as the last truck offered with a 3 speed o/d was 1965/67 F100 352 using a T-85 o/d.

Only one 3 speed manual transmission was offered in 1973-1979. The Ford 3 speed all syncro 303. If you have first gear syncro (able to shift into first without grinding), then you have the 303 3 speed.

I know the part you need (7050), I just need a trans code off your door's VIN plate to determine what you have.

 

the trans came out of a friends 1974 f100 truck that was wrecked but still ran great pulled motor and trans sent rest to wrecking yard

 

The only way you are going to get the correct part is list the transmission ID number, on drivers side of case near levers.

No 1974 truck had 3 speed w/overdrive.

 

Is this one of those tranny's that I have been advised on this site to put in reverse when you park the truck? Tell me that someone here knows what I'm talking about. I had an overdrive tranny and was told it was weaker than my standard 3 spd in my 65 and to put it in reverse when I parked it.

 

The reason that you use reverse is because it is the lowest ratio. It is the slowest gear of them all, and would have more hold with the smaller I-6 engines with parking.

John

 

I was told on those overdrive trannies you have to put it in reverse because if the overdrive is engaged, no forward gear will hold it. I'll try to find the post.

 

I bumped an old post so you guys can check it out- but i can't seem to find where I heard about the whole put it in reverse thing. I guess when/if you do install it, leave the o/d engaged and try to park it with the truck in a forward gear. I was only concerned because somewhere I heard about a guy who didn't A.disengage the o/d, and B. put it in reverse. When he rolled up for fuel, the truck started rolling, caught the concrete filled ballast post by the pump and it almost tore the door off. Just don't want to see this happen to you. This may be a different style, but I think that is one little test I would try so as to avoid a costly screw-up on a prized truck. Let me know though, since I can't find where I heard this.

 

cfrives3, I am having trouble following where you are going with your posts.

You said put it into reverse, I tried to explain why you would do it, I don't think anyone is trying to disprove you.

Bill posted that there were no manual three speed OD trannys in 74.

Maybe a little further explanation would help.

John

 

What I am trying to say is that I heard somewhere that if you shut the truck off, with the o/d engaged, (I am assuming we are refering to the stock style pull lever in the dash, with a switch of some sort) it is as if the truck is in neutral, as in no resistance at all. However, the way I understand it, reverse still engages. It sounded strange to me when I read/heard it, but if this is true, then I don't want to see someone with a wrecked truck, or injury to that person. I know there is a pull on the dash, similiar to a choke cable, that operates something with this system. I know this because that cable was cut from the o/d tranny I was given. There were also 2 wires coming off of it too, I presume from a switch somewhere. When I was considering this tranny, I found out that the cable is a push pull thing, but I never found out anything about the 2 wires. I assumed that that was some sort of actuator. Again, I have not had the opportunity to see all of this in a truck, but somewhere I heard that if you don't do something, turn it off, push the cable back in or some such, if it's in a forward gear it may as well be in neutral. I know exactly what you mean about the lowest ratio, I always put mine in reverse when it is parked, as the ears have broken off of the pull for my e-brake. It works but it's a pain, and I don't use it in snowy or icy cond. as I don't want it to freeze. I hope I haven't confused anyone, I was just passing along a horror story I picked up through the years. The only reason I bumped up the other post was because banjopicker66 had some pretty useful info about years and part nos.

 

Thanks and John da picker is an asset to this site for sure.

John

 

bill
i got those numbers off the tranny they are orion(2603606)
in a earler post there was talk about wires comming off trans for over drive mine does not have any just wires on shifter for reverse
thanx paul

 

I'll clarify 2 points abou the old T-85N manual with electic overdrive.

1. To reconfirm what Number Dummy said, there ws no overdrive in trucks after '72. They were banned. See the reason below.

2. The OD function had what is called a freewheel capability. That is, the wheels could turn faster than the engine. Fun for coasting until the truck brakes overheated going down the mountain with an extra 1,0o0 pounds or so.
Also, as noted, the truck will roll with the engine off, EVEN WHEN IN GEAR, unless it is reverse gear. Only the reverse gear will lock the transmission.
With one exception as noted: The OD lever locks the transmission OD in any gear so that it will not freewheel.

Poeple couldn't or wouldn't get this straight, and there were accidents. They blamed the automakers instead of their own ignorance, so the government banned the electric OD after '72.

Keep in mind that the term OD means the the engine is turning at fewer RPMs than the transmission output shaft.Instead of a 1:1 ratio at the final drive, the ratio is more like .75:1. For every 75 time the engine rotates, the final drive rotates 100 times. There are a few OD transmissions that are NOT electric OD, but have a very high 4th or 5th gear that effectively acts as an OD.

 

now that i'm on the same page here(replied to the old post didn't look at the date).i understand th princpil of od trans and that they can be electric. i am running an srod trans(tremec t170fs) and 4th gear is .78 or .79 to 1 and 3rd is 1 to 1 and when i throw 4th rpms drop about 1000 thats not an od trans (got the ratios from a trans web site) ? i do not mean tobe disrespectful but i do like learning new stuff.also i was born the same year as my truck 66 (thanks for setting me straight on that ND) so i never even saw an orig electric od trans only heard of them.