Recently had my steering gear box replaced, now I have a "hissing" noise any time I turn the steering wheel, but worse when I turn left? Been back to the shop 4 times and a second box but still have the noise. any ideas? Also can anyone check their 04 steering box and tell me if the rear line going into the box has the O ring visible at the flare nut coupling? Thanks.

 

Get a small hose , fuel ect. then put one end to your ear & move the other around the pump , listen for the loudest spot , some sort of restriction maybe , pinch hose , line or some trash in there ,
How many miles on truck ?
A little odd if low miles , some thing maybe came from the gear box & got into pump , making this issue , ask the installer .
Let us know answers .