4 Speed Tranny is dead....I need quick advice!!!

[ultrapremium]

Guys. My 4 Speed in my 72 F100 just locked up on me. Barely will go into gear and when it does it screams like a firecracker on the 4th of July.

Several people that have looked at it tell me the transmission is gone. Ok. So, knowing that I have to replace it (and don't have much money to spend), I need to know what range of tranny's out of what cars I can get that will basically be a bolt on for my truck.

[flyboy2610]

Which tranny do you have, the T-18 or the NP-435?

[Jake11]

The truck 4spd's don't usually just come unglued. If it's a T18 or 435
pull the top cover off and look inside. You can do it while it's still in the
truck. Maybee a shift fork broke.

[averagef250]

Any Ford truck 435, T-18 or T-19 from a highboy or 2wd will be a direct bolt in for your truck. Year ranges of mid 60's through 87 or so.

It takes a ton of abuse or way too much power going through it to kill a truck 4 speed. No matter what's wrong with it if you're not affraid to tear into it you can probably get it back on the road for under $50.

[REDNECKMOBILE]

I'd take a long hard look at the clutch and throwout bearing first, the transmission doesn't usually make that sound.

[Jake11]

[ultrapremium]

If I take some photos of the clutch and throwout bearing (and of my truck hehe), could you guys tell me off hand if thats what it looks like???

[ultrapremium]

Ok guys, here are hi-res pics of the tranny.

http://www.phoolz.com/truck1.jpg
http://www.phoolz.com/truck2.jpg

I also made a video with a few questions about the tranny and its parts.

http://www.youtube.com/watch?v=CemfuqXOKIE

Oh and btw, it is a NP-435 4 Speed Toploader....

[390Nut]

How does the clutch feel when you step on the pedal?

Nothing looks immediately out of place inside the tranny, but I'm far from an expert with them.

[spartman]

The shims as you call them would be your synchronizers.
They are what make your shifts from 2-4 smooth and not grind.

Not sure what that big piece is but it isn't the throwout bearing.
That would be on the outside of the gearbox

[Jake11]

Look here. read up. http://www.fordification.com/images/dow ... ebuild.pdf

That's the synchro. The throwout bearing is inside the bellhousing. If
theres no pieces or debris in the bottom of the trans. it's probably not
the trans. The synchro's all have movement in them.

Pull the tin cover off the bottom of the bellhousing. See if anything
falls out. Look up in there with a light.

[ultrapremium]

So the throwout bearing is on the outside of the transmission underneath the input shaft, correct?

[ultrapremium]

Also, would it be a problem if there wasn't a drop of gear oil in the transmission at all???

[mrsnicks]

Umm.. yes.... no gear oil in a transmission is a VERY BAD thing.

Patrick

[ultrapremium]

Ok. I think what I'm going to do first is put everything back together, fill up the tranny with 90wt (1.65 quarts???), new gasket up top, and start it up and see if that solves my problem...