Transmission Problems ???

[InTrouble]

Finally fixed my rear differential and is working fine now.
I have transmission problems now and, since where I live nobody has a decent scanner and couldn't tell me what the problem was, I decided to buy myself the AutoEnginuity Scan Tool with the Enhanced Ford.

Scanned My Explorer and The Codes Are :

P0721 Output speed sensor circuit range/performance
P1900 output shaft speed sensor circuit intermittent.

What should I do with these codes?
What should I tell the mechanics here what to check for ???

(I live in Dominican Republic so, here, we have to tell the mechanics what to do or else, they'll just tell me to change the transmission !!!....)

Thank you very much for your help once again ...

 

[Cobraguy]

My STRONG suggestion would be to purchase a FACTORY service manual and follow the pinpoint tests for those codes as it could be a few different things. In your situation, I couldn't imagine not doing it that way.

 

[no1getsoutaliv]

just a thought

the explorer trannys are notorious for im pretty shure there called shift solenoids going bad on the right side of the tranny youll see 2 circilar peices that are inches from the catiletic converters seperated by an itty bitty heat shield and what happends is the soft rubber that allows the solenoid to acctuat the shift properly hardens up and dosent work like it should ive done 2 diffrent trannys in 2 friends trucks so for and it is cheaper then replacing the tranny once you get them out easy way of checking is to drop that rubbr peice on a hard table if it s bouncy and soft its good if its hard and non bouncy replace the 2 good luck

 

[InTrouble]

Thanks for your reply guys !!!
I'll have my mechanic do all that on tuesday. Meanwhile, if anybody has more suggestions, it would be GREATLY appreciated ...

Thanks again.

 

[BrooklynBay]

Check for a signal coming off of the sensor. Check the wiring, and the connector on the transmission. Check # 7 in my list of useful threads for more information.