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Also Need a Door Handle?

Snapped a handle getting the old gearbox out?

It's common when the lock has seized. We've pre-matched the door handles that fit this gearbox's PZ (92mm) so you can replace both together.

See Compatible Door Handles →
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GU Old Style 45mm Backset Multipoint Door Lock Gearbox Replacement Centre Case

by GU
Original price $41.00 - Original price $41.00
Original price
$41.00
$41.00 - $41.00
Current price $41.00

GU Old Style 45mm Backset Gearbox

This replacement centre case gearbox is designed for the GU old-style 45mm backset multipoint door lock mechanism. In most cases, door lock issues stem from the gearbox, and replacing it is as simple as removing a few screws.

This version includes a faceplate extension but is compatible with all 45mm backset GU Old Style models.

Key Features:

  • Backset: 45mm
  • PZ Measurement: 92mm
  • Functions as the internal mechanism operated by the handle
  • Commonly the main issue when a lock fails
  • Reversible latch for both left and right-handed doors

Technical Details:

A full technical diagram is available in the image gallery.

Door Handle Spring 1 Door Handle Spring 2 Door Handle Spring 3 Door Handle Spring 4
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