Trans appears to freewheel downhill while in First Gear

[BillRod]

Hi All

2000 Explorer, 4.0L OHV Auto Trans.

Putting the Trans on 1st Gear it does not seem to hold the truck back going down hill.
As is maybe the Converter is not locking?

Fluid level is good. It is in first gear because going up hill it does stay in low gear.
It is only when going down hill that it the trans does not slow the truck as it should.

Thanks in advance for any help on this.
Bill

 

[transman304]

No low gear hold back is one of the signs of failed VB gaskets. The year of vehicle you described is one of the most common years to have this type of issue.