Toilet gurgling, won't flush with shower running

[jmpadil3]

Problem:

• My toilet will suddenly not flush when I'm operating the shower in that bathroom.

Additional info:

• The toilet also bubbles when the shower is running. Toilet operates fine before/after shower. Other toilets, sinks, and showers in my house drain perfectly fine.

What I've already tried:

• Plunging the toilet
• Augering (3ft) the toilet
• Plunged & augered the toilet in the adjacent bathroom
• Snaked (20ft) an upstream tub overflow drain
• Snaked (20ft) an adjacent downstream clean-out

Considering tonight:

• Longer toilet auger (6ft)
• Snake exterior cleanout (upstream/downstream)
• Hose bladder attachment thingy down the roof vent

Any suggestions?

 

[Sylvan]

Public Sewer or private disposal?

 

[Sponsor]

 

[jmpadil3]

Public Sewer or private disposal?

Public sewer, no septic.

 

[Sylvan]

If you can get a 3/4" snake I would snake upstream and downstream if you have a 4" running trap

If worse comes to worse remove the toilet and carefully snake the piping with no less then a 1/2" cable and push it past the lead bend before you start the machine