1990 ford bronco 302 auto transmission shifting problem
Will take off in low gear and shift to next gear but will not automaticaly shift to drive or overdrive.i thought i might have pulled a vacume line off in the woods while hunting, when i looked underneath i could not find a modulator valve. I did find a plug with wires plugged into tranny.I haven't really driven it much since my back surgery in may of 2008,and only driven it a mile down the road to my land not over 25 mph and back to the house. transmission fluid is fine, i am thinking it might be an electrical problem or dirty filter, it was rebuilt 7000 miles ago. if you have any advice i would appreciate it.
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Re: 1990 ford bronco 302 auto transmission shifting...
Check that you don't have a cable from throttle to transmission that is partially seized and just needs to be lubed up. Probably be able to follow it down and see where attached at tranny and make sure moving freely at both ends. I usually found linkage at tranny tight, and lubed until moving freely. It's like it's stuck in passing gear.
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90 Ford Bronco II: You have to put it in whichever gear you want it in before you start it or it wont shift at all. Then once you are going its extremely hard to shift into the other gears. Reverse is the only gear that sounds like its grinding.
Ok here is a long shot but sometimes it will work. Put the 4wd position switch to 4wd Lo, put your transmission in reverse and back up for about 50 yards, stop and put your transmission in neutral, then shift the 4wd to 4wd hi, wait a few seconds and shift the 4wd to 2wd hi, Sometimes the t-case will get stuck and this is how you reset the computer. I have known people that really got their t-cases messed up because they thought that shift on the go meant that they could shift the t-case into 4wd LO while moving but shift on the go is only for 4wd hi the gears will not mesh up fast enough for 4wd LO because the ratio is 1 to 1 . I hope this helps you.
look at the driver side visor the shift pattern is printed there. it should be also on the shift lever itself . I think 2 wheel high is all the way forward then back 1 is neutral back 1 more is 4w low and all the way back is 4w high
try shifting it manually from low,let rpms rise,then 2nd,let rpms rise,then to drive and see what happens.It could be bad drive clutches in the transmission but could be a sticky valve body in the transmission,if it does work by shifting manually add 1\2 pint of dot#3 brake fluid to the transmission fluid to assist in cleaning the pistons in the valve body and seals and to help lubricate parts and seals
It is hard to say from your description what the problem is ... could be linkage issue ... could be trans is going as is with the other poster ... Losing overdrive. Clutches (bands/clutches) have had it. Be careful driving without that top gear ... doing too high a speed without the appropriate gear causes extra stress on your engine that could accelerate further problems. Try to do only driving at a low enough speed that the top gear is not missed ... will help the vehical last as long as possible.