If you get a harsh 2 3 upshift the problem is likely the 2 3 accumulator or excessive line pressure. If im shifting manually it will shift fine into second a little weirdly but rpms drop normally.
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Ford aod no 2 3 shift. There are two types of throttle valve control systems used with the aod. Transmission will not shift from 2nd to 3rd gear aod automatic. For starters it uprooted the second gear in the shift pattern which left the latter dwindling in the gory land without remarkable performance. Transmission problem 1989 ford f250 four wheel drive manual 80000 miles i have got a 1989 ford f 250 73 liter diesal straigh drive. The ford aod transmission was evident in cars like the mustangs fairmont and ltds around 1980 and 1993 and it was quite unique even though not in a really good way. Assuming the transmission shifts 1 2 and then stays in second gear without ever neutralling out the most likely cause would be a stuck 2 3 shift valve in the valve body.
If im shifting manually not doing 1 d 1 shuffle i still do not get third. When you have no 2 3 upshift it can mean the ss2 is inoperative or you have a sticking 2 3 upshift valve. At 40 mph the aod is designed to shift into overdrive lockup on the smaller input shaft into the direct clutch. Clutch transmission differential axle transfer case aod no 2 3 shift hey guys i have a 90 e 150 van with an aod that lost the 2 3 shift. The advent of ford aod transmissions. Thinking that the direct clutch was burnt i planned.
When im in drive waiting for it to shift into third at about 25 30 miles an hour 3rd is non existent. Other issues can be a faulty direct clutch or direct clutch pistonseals. Ive been working and looking into this issue for almost 4 days. The valve body kit is intended to modify a properly functioning transmission not to repair a problem. Refer to aod valve body kit faq 1. In dod which is fully automatic the aod performs a 1 2 3 4 upshift as vehicle speed increases.
I checked the direct pressure during a road test and found the it was coming up when third gear should have engaged.
Gallery of Ford Aod No 2 3 Shift
