Question about 1988 Ford Bronco

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88 ford bronco aod transmission problem

I recently had the aod transmission overhauled on my 302 ford bronco. I have bben driving it for about 6 months and the problem that I have is that the shifting is way off and I cannot get it to change right. I have been messing with the passing gear lever located on the valvebody but it still shifting erregular. By irregular I mean that It goes to third gear by the time I am at 35 mph. I need to floor the accelorator inorder to engage the passing gear. The other problem I have is that when I come to a stop the transmission is still down shifting aven after I come to a complete stop. I spoke with the guy that did the overhaul. He stated that the problem would wear out within a few weeks but i have seen no improvement. The guy that did the work stated that he installed a shift improve kit when he did the overhaul. I can feel the shifts real tight, especially when down shifting. This is the third transmission I have installed in this truck. no one seems to be able to get it right. I have taken it to the sand before and activated the 4x4 and it works fine. I did notice that the flywheel, the one attached to the motor, I think it is called the bendix looks scratched, like it was forced at some point. I do not know if this has anything to do. can you help any information would greatly appreciated.

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  • Anonymous Dec 04, 2008

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  • hardhedd Jan 05, 2009

    88 Ford Bronco XLT 302 auto transmission, manual floor shift transfer case, and manual lockout hubs . 4 wheel drive unit performed well when i purchased the truck. Have only owned it for about 4 months. Previous owner kept impressive log of repairs and maintenance receipts. transmission was rebuilt 5 years (and 50k) ago. Brand new Motorcraft 302 crate motor in 04. The guy replaced 2 rear driveshafts. The u-joints in need of replacement again. Now the 4-HI doesnt engage. It worked many times this winter, but quit working on my way to work. It has worked briefly a couple times since but i quit using it. Never could shift into 4-LOW.

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The first guy is right first the shift cable has to be set correctly if they did not replace it after overhauling the transmission the cable is stretched out to far to be adjusted so it will have to be replaced, and some had a shift modulator valve located on the side of the transmission if it went bad it would shift crazy there will be a vacuum tube going to it. it can be pulled off and you can **** on the end of the modulator valve if you can develop suction it's ok if not replace it. there is also a screw adjustment inside the modulator valve so you can adjust it to shift right you have to turn the screw in to increase rpm shift change. If you need more help let me know by posting to this answer and rate if this was helpful.

Posted on Sep 23, 2009

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OK, for the first guy, your flew plate being scratched is a normal side effect of the installation of the transmission and is not causing your problems. I can't remember off the top of my head if that is a TV/Vac shifted unit or an electronic controlled one. If its TV/Vac then your cable is misadjusted, or even easier to fix, your vacuum regulator diaphragm has likely ruptured and needs replaced (not a big deal, easy to do). If you can find a vac line running to your transmission somewhere near the selector cable and take it off, if trans fluid comes out, there is your problem. If its an electronic shifted unit you have an electrical/electronic problem.

Guy #2, have you checked your transfer case shift linkage. My MS T-case did the same thing for a while right after i had it out, found the shifter linkage what not adjusted right when i put it back in b/c my plastic washer had broken in two and let the pawl slip off its flats.

Posted on Sep 23, 2009

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