Trans not shifting!!

[maistro0]

NEED SOME HELP PRETTY BAD!!
IVE GOT 97 EXLORER 4.0 SOHC AUTO 4X4 WITH 190K(high mileage i know)
IVED REPLACE THE TRANNY CAUSE MY REVERSE WHENT OUT AND HAD SEVERE FLUID LEAK SO I FINNALY SAVED THE MONEY TO REPLACE BUT THE OTHER TRANNY THAT WE INSTALLED WOULDNT SHIFT AT ALL, REVERSE WAS GOOD BUT NOT SHIFTING FORWARD NONE AT ALL, SO WE THOUGHT THAT MAYBEY THE SALVAGE WHERE I BUT IT GAVE ME A BAD TRANS SO I TOOK IT BACK, THEY WHERE COOL ABOUT IT AND GAVE ME MY MONEY BACK SO I SEARCHED FOR ANOTHER ONE BOUGHT IT INSTALLED IT AND GUESS WHAT ITS DOING THE SAME THING NOT SHIFTING FORWARDAT ALL.
SINCE MY OLD ONE WAS GOOD GOING FORWARD I REPLACE THE SENSORS TO SE IF THE SPEED SENSOR WAS THE PROBLEM BUT THAT WASNT IT.IVED CHECK FUSES AND THERE GOOD MAYBEY TRANS MODULE??
ANY IDEAS?? I WOULD HATE TO THINK IVE GOTTEN 2 BAD ONES.
OH AND TO MENTION THAT MY SPEEDOMETR WAS WORKING FINE AND NOW WONT WORK WITH NEITHER TRANNY MAYBEY I NEED TO CHECK ON THAT?
SO IF ANY BODY CANT THINK OF SOMETHING I WOULD APPRECIATE ANY HELP
THANKS.

[Davescort97]

How do you know the speedometer won't work if it won't go forward in any gear? The shifter linkage is out of adjustment. Take the cable loose from the trans. shift arm. Manually move the shift arm on the trans. all the way back into low. Put the shifter on the console into Low. Tighten or loosen the cable adjustment so there isn't any play. Could be the wrong piston in the control valve. Trans. shop?

[shorod]

Does your Explorer have the 5-speed auto or the 4-speed auto transmission? I don't recall if in 1997 the 4.0L came with the 5-speed or not.

I interpret your post to mean you can go forward, but the transmission never shifts into higher gears. Davescort may be on to something with the shift linkage, although you still would have an issue with the speedometer not working.

Do Park, Neutral, and Reverse work fine? How about if you shift manually into a gear, like 1 or 2, does the transmission find those gears then?

If the vehicle speed sensor is not registering, that certainly can impact up and down shifts. The vehicle speed is derived from the rear axle speed sensor via the ABS module.

-Rod

[maistro0]

yeah reverse,neutral,and park work perfect,even if you manually shift it deose not work. my speed0meter gauge dnt work, all of my other gauges work fine its also feels very heavy at take off like if took of in 2nd gear.
Thanks.

[maistro0]

Where is the rear axle speed sensor located????

[maistro0]

Ok tranny deose shift manually but not on its own!??

[shorod]

It probably is starting off in 2nd gear, it's likely in "limp home" mode which usually defaults to 2nd gear. The rear axle speed sensor is on the rear axle, near the pinion where driveshaft connects to the rear axle.

-Rod

[maistro0]

Im taking it in today to autozone to see about the limp mode. Hope fully we can make it work. Ill keep updating.
Thanks!!

[okhedher]

hi check the wire of the brake switch or the brake switch itself located behind the brake paddel.
good luck
okhedher,dubai