Transmission overhaul.

[GPierce]

After 5000 miles my transmission started jumping out of 2nd when going up steep mountain grades. I checked for the spacers between the flywheel housing and the the block; they were there. I overhauled the shift tower installing new rails and Steve Mitchell’s plunger ball, spring and spacers. It still jumps out. Pulling a steep hill in 2nd and holding the shift lever I can feel it start to walk back out of second.
Back in the 50’s I remember Model A’s with a hook on the instrument panel to hold the tranny in 2nd. I prefer to have the transmission overhauled.

I am looking for recommendations for a quality transmission overhauler.

Snyder’s trashes all the interior components and puts in all new components.
After reading about lack of quality new gears and bearings I am not sure I want to that route unless some of you Barners have had good results with Snyder’s transmission overhauls.
Comments please.

[Oldbluoval]

Firstly, I don’t have such experience so maybe should remain quiet… but,

Snyder’s is great to stand behind their products
Further, you might check with Steve at Bert’s about such. He’s noted for quality service and stands behind his work also.

I’ll be curious of more authoritative posts hereto.

[Joe K]

Two gears could be causing this issue.

You can remove the transmission top and see one of these directly. A good eye and a strong light may show you the cluster segment below which is the other gear.

Generally my experience is either replace everything with new and start over - or find replacements for the offending gears and replace only them.

Probably the best transmission I have was done by this latter method.

The thing you don't want to do is "mix & match" between brand-new and old parts.

Joe K

[Brentwood Bob]

PM sent. Did you replace the forks when you went thru the tower?

[Oldbluoval]

Joe K…please elaborate..


“Generally my experience is either replace everything with new and start over - or find replacements for the offending gears and replace only them. The thing you don't want to do is "mix & match" between brand-new and old parts.“

How do you replace the offending and not mix and match? “New” used gears?

[GPierce]

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Originally Posted by Brentwood Bob

PM sent. Did you replace the forks when you went thru the tower?

No, they looked good using Tom Endy’s criteria, I did reverse them though when I reassembled the tower.
I got your PM. Thanks.

[Brentwood Bob]

Will be following to see how this works out.

[Joe K]

Originally Posted by Oldbluoval

Joe K…please elaborate..

How do you replace the offending and not mix and match? “New” used gears?

You have on hand about four "barnyard" transmissions and you pick the two best of what you need. I.e. you're using "acceptable" but worn parts to mate with "acceptable but worn" parts.

The problem comes with mating "New" - with sharp edges and no surface wear with "old" which will have both. My experience has been this results in a "noisy" transmission.

As in for me "Your truck sounds like a truck."

"Brinnelling" is the primary "end of life indication" for gear teeth. Wear oblique is probably what you're seeing but not necessarily brinnelling.

Hope this helps. Trannies are frequently found even on Ebay for $75 or less.

Joe K

[Tom Endy]

Whatever road you go down, I recommend you do not replace the three roller bearings with new ones from any of the suppliers. It is not a case of they might fail, they will fail, and in less than 500 miles. The offshore folks changed the design without telling anyone a few years ago. The roller elements do not have axles on them, that have mushrooms. It is best to use good used ones of the proper design.

Tom Endy

[Joe K]

Originally Posted by Tom Endy

Whatever road you go down, I recommend you do not replace the three roller bearings with new ones from any of the suppliers. It is not a case of they might fail, they will fail, and in less than 500 miles. The offshore folks changed the design without telling anyone a few years ago. The roller elements do not have axles on them, that have mushrooms. It is best to use good used ones of the proper design.

Tom Endy

We've talked about the "hyatt style" bearing which Ford used almost exclusively in this application.

They are infrequently seen on Ebay. One seller offers all three roller bearings together on a cluster shaft as used in the transmission but only one of the three is the Hyatt type.


Joe K

[Big hammer]

I would find a good known shifter tower and try it before removing and overhauling your transmission. What keeps the transmission in gear ? the plungers and spring, Mitchell shims the springs to make them stronger, I would use the old spring and clean the bores that the plungers live spotless. The plungers need to move freely in the bores !

[Oldbluoval]

Joe K
Thanks. That’s what I was surmising u meant.
I have assembled trannys from a stash of used gears and had reasonable success.

[Tom Endy]

The attached article may help.

http://www.santaanitaas.org/wp-conte...ut-of-Gear.pdf

Tom Endy

[Richard Knight]

The shifter tip does not keep the gears engaged and only places them in the proper position. Sure it holds the gear in position but under load it is the cut of the gear that holds the gears from becoming disengaged. when the gears are mot worn you cannot pull it out of gear under load. Your second high gear and your 2nd gear on the cluster are worn, period. When borg Warner first remade new cluster gears they also would slowly come out of second on a long pull. Last trans I had to disassemble three to find a good cluster and 2nd high that would not be noisy and stay in gear.