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Check your E-break first, secondly check to make sure you have no errors kicking from the control unit (engine computer module) which may or may not trigger a check engine light. Moreover it could be several things. Since it's an automatic the drive train maybe damaged, controller unite could be damaged, the transmission could (and probably) is dying. I'd have a professional mechanic check it out.
I have a 92 Crown Vic first and second works fine reverse works fine when it shifts in the third gear it goes to slipping and overdraft can you help me fix this problem thank you
it may be a bad transmission modulator valve located on the side of your transmission,vacum operated. a sudden downshift or forward shift when unexpected is sign of a bad modulator valve or a vacum leak to the transmission.best to shop around for a garage w/references when it comes to transmission work though. check all the vacum lines to your transmision,you need to look on the underneath side of your truck on the side of transmission for a loose or disconnected vacum line on the side of the transmission. when you feel the vacum line,follow it to the top of engine,the vacum line is about 3/8th line,and may be disconnected or losing air. to make this short,when you drive the car,start out in low gear and shift the transmission,manually from 1st to 2nd to 3rd does it do right with no slipping? if it does this right and shifts great manually,the modulator valve on the side of the transmissions bad,or a bad vacum leak in-between.thank you for choosing fixya.com
The aerostar tranny cooler sits too low away from the trans and tends to become blocked and restrict the flow to the tranny It could not hurt to remove it and flush the cooler out I have had a few aerostars and I have had to flush them all,the tranny fluid came out very dark and smelled very burnt it may not solve your issue but maybe. It has solved a shifting issue for me the 1-2 is smooth as silk now.
Something wrong with the Overdrive.Is it a sensor or a control module.Sounds like it might sounds like it gos worse after you hooked it up.Did you just buy the car?
Hi ray_c_brown, This pause is determined by a time lag test, and you can check this yourself with a stop watch.Engagement time in "D" range should be a maximum of 1.2 seconds and the engagement time for reverse should be a maximum of 1.5 seconds. So with your vehicle warmed up and assuming curb idle speed is correct set the park brake,make sure ac is off (air cond) shift transfer case to 2H or if it is a NP249 transfer case leave in 4H,put your vehicle into neutral and set your stop watch shift to Drive and record time repeat this a couple of times and do the same with reverse,as you said the delay is with reverse so if it takes longer than 1.5 seconds here are a few things it could be:shift cable adjustment,low line pressure,worn direct clutch, first/reverse brake worn or a worn or damaged overdrive clutch.Hope this helps you good luck :)
i found with mine there was a bar that ran up to the carborator from the linkage that was not secured properly once i hooked it up my trans shifted better but i lost some performance so the bar is a governer of sorts.
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