Braking resistance in reverse only — 2016 Jeep Wrangler JK

When I start the car and reverse off my driveway (slight downhill), braking feels noticeably more resistant than normal — like I’m fighting against something to stop. The moment I go forward, it’s completely fine.

What I’ve tried / ruled out:

∙	New brake pads (all 4) — problem existed before, no change after

∙	Handbrake — same whether on or off while parked

∙	Neutral test — rolled back on gravity in neutral and braked; resistance was normal. This suggests the drivetrain being engaged in reverse is contributing somehow

∙	Rear differential service — recently done so fluid condition/level isn’t the issue

What I don’t know:

Whether this is a transmission/drivetrain behaviour (torque loading reversing direction on worn components), a brake booster vacuum issue at low speed, or something else entirely.

Automatic transmission, 3.6L Pentastar. Anyone experienced this or have a direction to look?