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1949 Ford Coupe RESURRECTION
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I feel your pain.... First off, if there were no mistakes on your drivetrain portion of the rebuild, then to minimize the "trouble" of taking it out, There are a few things to address while it's still in the car. But I'd have a question or two.. when you rebuilt it, are you SURE that you got the checkballs back in the correct locations? Did you adjust the band correctly? It should only have no more than about 1/8" travel driven by the 2-4 servo. That can be checked by taking the cover off the 2-4 and push the "4" piston / pin in, with a micrometer mounted on the pin the check the travel. Did you do any air pressure tests before final assembly to assure that the clutches are being applied? I don't know everything there is to know, but I have learned about 100 things about them .... so part of this is just guessing. Did you check all the valve body valves move freely? Also, get a 300 psi pressure gauge and check your pressures...

This video doesn't make sense to me, but surely he's being factual... seems his TV valve stuck wide open or something like that......This may not be it, but ................https://www.youtube.com/watch?v=e4PXNrMy11U

In a nutshell, to save yourself from grief, you can do a number of things without taking it out, including taking the valvebody out (that's the LAST thing you want to do due to the difficulty of getting the checkballs back in (with some heavy grease to stick them where they should go)...

Here's my saga... Chapter 1

And Chapter 2

I used this guy's videos to guide me on my Chapter 2 rebuild.. the video is for a 4L60 E but the drivetrains are the same...

The guy who knows EVERYTHING about 700R4's is Dana at ProBuilt Transmissions... if all else fails.. he's very helpful in sharing his knowledge !

Keep us posted ! ! !
 

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1949 Ford Coupe RESURRECTION
Joined
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1,001 Posts
Before you take it out, consider cutting out the floor / tunnel ....... ! ! !! That's what I did...

this is page 2 of Chapter 2
 

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1949 Ford Coupe RESURRECTION
Joined
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1,001 Posts
Well.. you are a better man than me.........but I'm 77 ..... in any case, go ahead and get a Sonnax 2-4 COMPLETE servo kit and a 0.500 pressure control valve that goes into the bottom of the pump.. And like that guy said in the video, see if your TV cable connector/internally is sticking ....

I'm wondering what you meant by "it engages perfectly" ??????? The governor?

You are in Uruguay ??
 

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1949 Ford Coupe RESURRECTION
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1,001 Posts
Generally, the problem caused by the wrong pin length is that it's too short, meaning that the band may not hold, and being too long the band might burn up due to it not disengaging. 0.25" is about the limit of "too loose"......but in any case, I'm not so sure that would have caused the problem.... but I don't know everything, ya know...
 

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1949 Ford Coupe RESURRECTION
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1,001 Posts
before you do that, call Dana at Probuilt.... "phone or text 909 435-5360 or call 909 795-1876 "

a major deal, also is checking pump pressure.. do that before you take anything apart
 

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1949 Ford Coupe RESURRECTION
Joined
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1,001 Posts
Watch all these and view the pictures... something seems funny with that one check ball location on the upper right of the second picture. I'm thinkin' that hole next to the check ball location is WAAAAY too big.. does it look like it's been drilled out??? I'm sure you are already pulling ALL the valves and springs in the valve body to assure nothing is stuck... and also your T/V and the detent.... and since you have it out, order that dang Sonnax 0.500 pump pressure valve. it's a ***** to get out in the car... (see my special tool I made to make it easy on my website)...

AND look for worn holes in the divider plate, but I'm sure you have already done that....

UPDATE: also get a pair of Sonnax accumulator pistons while you have it open and remove the old ones that have the rod in the center..

As a matter of fact, may as well go here and do some shopping for all sorts of things that will help performance:


Check ball information
 

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1949 Ford Coupe RESURRECTION
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1,001 Posts
You might check this link out for some clues:


And
 

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1949 Ford Coupe RESURRECTION
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1,001 Posts
Here are some references.. I've never heard of before...

Also, I remember someone telling me that if the accumulators are very leaky, it won't upshift... so get those sonnax pinless pistons...
 
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