'98 rodeo transmission help

1998 Rodeo LS 165,000 mile. While traveling, my transmission started slipping, and had an obvious leak. I had the fluid flushed and changed, and was told they changed a
tube that had a leak. The trans. worked perfectly immediately after the service, but overnight it leaked off a significant amount of fluid. At that point, I drove it back to where the service was done the previous day, and they refilled the fluid, and reattached/resealed the suspect tube. Again, after this effort, everything worked great,smooth/no leaks, with one exception...it wont go in reverse. On day 2, before I took it back to be refilled, reverse worked, but it would "slip" in both D and R. While driving the 2.2 miles to the service center, the "check engine" light flashed in red. Could this have triggered a switch, or ERROR code that is keeping an otherwise functional transmission from performing properly? Do I have any hope of restoring functionality without completely overhauling, rebuilding, or replacing the transmission? Also, what is the ov/un on $$$ according to the oddsmakers? Thank you for you respnses
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Please tell us more about the tube that was leaking. What was it? There are only 2 tubes coming out of this transmission, to my knowledge, and they are to and from the oil cooler in the radiator. If you rubbed a hole in one of those (I can't see how), or hit something that holed or caught on one of those tubes, I suppose you could lose fluid. Have you serviced the transmission before in it's 165K life? Fluid and filter change should be done about every 30K or thereabouts - if it hadn't been done before, I'd say your transmission is in need of a rebuild. The guys that changed your fluid should have been able to tell you what the bottom of the pan looked like and how much wear material they found there. Also, the color and smell of the fluid would have told them if the transmission was due for an overhaul. Where did you take it - a real transmission shop or a oil change place?
As far as the Check Engine light goes, you could easily have that read by someone at Auto Zone for free, and they'll tell you what it means. Normally, error codes stored in the CEL system will not prevent things like transmissions from working.
I'd suppose that for a rebuilt transmission, you're looking at about 1500 or so. Probably more, knowing the labor rates of the shops around here. Not sure where you're at. Steve

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