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Tranny tear down and inspection

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Old Apr 24, 2008 | 11:22 PM
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Default Tranny tear down and inspection

Anybody have an idea of what the charge would be to tear down and inspect a supposedly "race" tranny (700R4) I acquired.
I don't think it is too heavily "race" built, since it still has the TV cable, whereas it should have already been converted to a manuam VB, IMHO.
And I was told by my friend's kid I swapped a powerslide for, that the guy he bought it from said it takes racing fluid, at about $12.99/qt. Any help appreciated, as always.

Rich K
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Old Apr 25, 2008 | 03:11 PM
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Originally Posted by thirdtimevetteowner
Anybody have an idea of what the charge would be to tear down and inspect a supposedly "race" tranny (700R4) I acquired.
I don't think it is too heavily "race" built, since it still has the TV cable, whereas it should have already been converted to a manuam VB, IMHO.
And I was told by my friend's kid I swapped a powerslide for, that the guy he bought it from said it takes racing fluid, at about $12.99/qt. Any help appreciated, as always.

Rich K
Not sure I understand the question. I do not agree with your theory of a full manual valve body equating to a race trans. I equate a race trans as being able to perform in a racing environment while withstanding the power put through it, but that is simply my opinion.

Regarding teardown and inspection, I would be prepared for 6-8 hpurs to completely tear down a trans on the bench, document the internals and reassemble.
By opinion on "racing fluid" is baloney.
I have run wal-mart fluid thru my 10 second ride for nearly 20 years. Good, clean fluid is needed, not race fluid. Again, others are free to disagree, but testing on my part backs my opinion. I am not trying to sell it.
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Old Apr 25, 2008 | 04:01 PM
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Thanks Pete,
That pretty much sums up what I wanted to hear, especially about the "special racing fluid" (I thought that was BS from the start). I assumed that a 700R4 set up for race would naturally have a manual valve body (bad assumption).
My '89 tranny has a soft 1-2 shift, except when cold (pressure problem, maybe?...clutches, bands?), hell, I don't know. That's why I asked about looking into the tranny I have, and if it is OK, just swap it out and have my original as a backup, and get it rebuilt later (no down time to speak of).
Now, if I could just figure out how far away you are from me (Pittsburgh), I may bring this tranny to you, if you wanted the job? I would hate to swap it out and have a worse tranny than my original. One last thing, how can I identify the year and model of this mystery tranny? Thanks again.

Rich K
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Old Apr 25, 2008 | 10:24 PM
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Originally Posted by thirdtimevetteowner
Thanks Pete,
That pretty much sums up what I wanted to hear, especially about the "special racing fluid" (I thought that was BS from the start). I assumed that a 700R4 set up for race would naturally have a manual valve body (bad assumption).
My '89 tranny has a soft 1-2 shift, except when cold (pressure problem, maybe?...clutches, bands?), hell, I don't know. That's why I asked about looking into the tranny I have, and if it is OK, just swap it out and have my original as a backup, and get it rebuilt later (no down time to speak of).
Now, if I could just figure out how far away you are from me (Pittsburgh), I may bring this tranny to you, if you wanted the job? I would hate to swap it out and have a worse tranny than my original. One last thing, how can I identify the year and model of this mystery tranny? Thanks again.

Rich K
Rich,
I did not wish to imply you were wrong. Some guys do solidly believe that a full manual v/b is a requirement. I have never been a fan of them, especially on a 700.
Regarding the distance between us, I am now living in Manchester, New Hampshire and it is approx 11 hours from Pittsburg.
On the pass side of the case, just above the pan gasket, there is a flat pad that has numbers stamped into it. Whatever number it begins with signifies the model year. If it has an aux valve body, it is a mid 87-93 version.
The stamping will confirm it.
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Old Apr 25, 2008 | 10:40 PM
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IMO I would just run the transmission as is. Unless it has expensive kelvar/blue racing clutches, you might as well rebuild it while you tearing it down. The run of the mill so called high perfroamnce 700r4 rebuild kit are like $300, you going to pay transmission shop $500 probably to copletely pull it apart and put it back together anyways.
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Old Apr 26, 2008 | 12:33 AM
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Pete,
No worries about the manual v/b thing. I just don't like the TV cable system. I am planning on installing a Miniram, once I gather up enough money for heads and a cam. As you know, my rpm band will rise 1000-1500 rpm, and I would rather be in control of the shifts, rather than a governor, or TV cable, whichever controls the shifting rpm.
I suppose it would be the governor, which has me baffled as to what the TV cable actually does, except glaze up the clutches or bands if not set on the money.
I suppose the best of both worlds would be w/a governor set to shift at a preset rpm, but isn't that a trial and error process?

To the poster above this one, I don't know the history of the tranny I traded for, so I don't want to do a lot of work removing mine and installing a piece of $hit.

Anyway, thanks for the responses.
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