Transmission Gears Ok?

[Eric Jensen]

Replace or ok to use? Out of a 29 truck that’s been sitting in garage for 35 years. Taking it all apart and hoping to get it all back together 😂

[Stingray70]

Pictures are a little fuzzy but I am going to go with- replace.

[J Franklin]

If they are chipped, pitted, or galled, I would replace them, unless you will be only driving in parades or down to the corner ice cream shop.

[old ugly]

1st and reverse gears will be REAL noisy and it will slip out of 2nd.
to make it right you need at least the
-cluster
-1st/reverse slider
-2nd/high slider
-possibly the reverse idler (cant tell from the pic)
the shafts and pins, cant' tell from the photo.

if you are on a tight budget search for used gears or trannys. but remember , one mans idea of good may not be actually good. so be careful what you buy.
i took apart 6 trannys to make one fairly good one. (still noisy)
new is pricy but you may be better of in the long run.
or
if this is your forever keeper then a full syncro tranny may be in order.

[GRutter]

Check with Bertz for good used gears.
Take a look at the main roller bearings (2 short, 1 long) also

[jack backer]

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two things to look for, gear tooth wear and pitting/galling. A simple way to check for tooth wear is look at the 'rectangle' on top of the tooth..your large gear on your cluster does not get sliding gear wear,so it makes a good reference. Now look at the smaller gears on the cluster and the two sliding gears..is the rectangle tapered? if its tapered over half the tooth length replaced the gear.This is what causes it to pop out of gear,and noise.

Galling and pitting occur on the face of the tooth,and are 'load' failures,the hardness begins to degrade.This leeads to tooth failure and all kinds of damage.reject any gear with heavy pitting or lateral score marks (galling)

Reading the rectangle on the top of the tooth is valuable when buying used transmissions,often you cant see the tooth face on the cluster clearly when its assembled,the rectangle is a tell tale..

[Eric Jensen]

Thank you all! Here’s some close up pictures.

Low sliding gear appears the most worn looking at the top rectangle more then 1/2 length - others around 1/4 length. Replace all or just the low sliding gear? Or if you need to change one then you need to change all?

[J Franklin]

If you plan to tour replace them. They all seem to have a bit of wear, the cluster for sure. Are some of the teeth spliting or cracking? Take a few more good shots of the side of the teeth that do the work. The reverse idler is inexpensive the rest not sure. How is the input shaft/gear? If you don't find Ford made gears, check for recommendations. I used MARK gears and they were the best back then. Make sure you fit the slider gears as per Ford bulletins or it may pop out of second if it is too sloppy.

Welcome to the forums and I hope you are getting some ideas. Where are you located? If close I can sell you a good transmission for less than rebuilding yours.

[Bill G]

The cluster gear looks pretty beat up.

[jack backer]

I’d change all in the pictures tooth face wear and pitting see how you can tell by the “rectangle”?

[Conaway2]

The pictures show quite a bit of wear on the teeth on all the gears. I suggest finding original gears with less wear. Sometimes a complete transmission can be found for a pretty good price, and one that is cruddy and rusty on the outside will contain parts in surprisingly good condition.

I suspect the roller bearings and shafts will need to be replaced with new parts as well. New shafts with o-ring seals are available; these will eliminate transmission fluid leakage.
Good luck - Jim