727 rebuild and something’s goofed!

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bcuda1$3$

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Happy Thanksgiving day everyone. I did a full rebuild of my TF 727 and went by books and videos, and was very meticulous with reassembly. I will say the valve body was one of the harder things for me. I would rather rebuild the whole transmission over again then deal with the valve body.And btw I’ve taken valve body apart twice just to make sure it’s good. Also I did the “superior trans tf-tc kit” in heavy duty (increased line pressure) That has me, wondering if my issues are in the vb , but here are my issues.

1 With the car on jackstands, I can be in park and move it to reverse and I get immediate forward movement, now if I sit the tires on the ground, the Forward movement isn’t there I can rev the engine and it just kind of lugs down and not move at all in reverse.

2) it’s difficult to understand how the vehicle is shifting when on jackstands with no tires and no resistance , but attempted to listen and feel. When put into drive it does rotate the proper way and makes a what I think is a 1st to 2nd shift. . I don’t really know if it isor 1st to 2nd or a 2nd to third. The reason I don’t understand what gear it is, is I can downshift it into first and there’s good forward movement and then shift to second and no change as in no upshift (Like it’s still in first) but when upshifted to d it makes up shift but was that a 2nd or third up shift lol!!??

Front pressure port only reading (d) 80 psi

Middle port only readings where d 2 and 1 all 95-110 psi.

Rear port only reading was reverse gear with 220-240.

Has 9 quarts in it but I haven’t been able to run it but a few minutes because my engine doesn’t have a radiator yet. Some say it hasn’t run long enough, and yes, that’s correct but should I have these weird symptoms?

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Finish putting your car together and fill as required, adjust the kick down to spec, then follow the ATSG tests exactly and in the same order. Post all the pressures as described in the book and in what step. List what steps in the shift kit you followed and which you skipped or were not applicable.
 
This was caused by someone doing there own Valve body modification. Street racing and trans locked up 2nd to drive. Found the cause after putting the trans in an E-body . 17 year old dead at the scene. Buy a valve body.

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As I was look through the atsg info I seen a spring that I’m about 90 percent sure mine didn’t have in it when I took it apart or put it together. Any of you know if this spring is on a 74 vb? Wonder if that the prob

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That spring should absolutely be in there for the proper operation of the transmission unless it has a full manual valve body. But... the symptom you describe in reverse sounds like it's holding reverse and a forward gear at the same time, similar to a transbrake. I'm curious, how did the transmission operate before? I have to strongly agree with the closing sentence on post number 3 at this point...
 
Agree with Garrett that it should be in there, it controls fluid pressure in your trans. Check out this John Cope video where a guy had a problem similar to yours, but in his case he was missing the sleeve.

 
I watched the video and he was missing the regulators valve throttle pressure plug. I’ve got that, the sleeve, and the other end plug with plate on. He didn’t put a spring in his either.
 
i had that happen in a griner transbrake. turned out 1 of the balls was bad. in a 727 vb, there are 2 balls that are slightly different in size. possibly in the wrong channels. but i agree with oldmanmopar, get a different vb 1st.
 
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