Click here to download the Brochure and Order Form.

With 45 years experience of maintaining Rolls-Royce and Bentley Motor Cars we first introduced an overdrive system for pre-war cars in the late 1980’s.
Now, for all those considering a ‘fifth gear’ we have further refined the overdrive system which received such high acclaim from Lt. Col. Eric Barras, President of the Rolls-Royce Enthusiast Club, when it was first introduced.
Utilising the tried and tested Laycock Unit, suspended and self aligning from three flexible mounts on a substantial cross-member, the complete package including balanced prop-shafts, adapters, wiring loom, speedometer drive etc,. has been revised to appeal to the self-fit customer.
Easily fitted and replacing the existing prop-shaft, there is no need for drilling, welding or the re-routing of One-shot pipes or the existing wiring harness.  In addition the complete installation can be removed at any time, leaving absolutely no trace.  Each Laycock Unit is produced to order with a matched speedometer drive ratio.  The Overdrive is operated by the flick of a switch (supplied) whilst engagement is restricted, for design reasons, to top gear.
A full ‘Factory Fitting Service’ is available and ‘On Site’ fitting can be arranged.
This overdrive system is suitable for all ladder frame chassis vehicles originally fitted with a prop-shaft.
We are certain that it will be of interest to the true enthusiast, not least because the simplicity of the design provides a considerable financial saving when compared with similar systems.

Conversely, and of interest to Motorway users and those considering touring, for a
                                 given engine speed the Overdrive will provide an additional 28% of road speed:
                                                              Direct drive                           2500rpm 50mph
                                                              Overdrive engaged                2500rpm 64mph

                                                Click on images below to view in a New Window

                   Overdrive Package:

           

Intermediate Shaft:         Suitable Gearbox Flange Adaptor                                              Shaft with Universal Joint & Connecting Flange

Overdrive Unit:                ‘Laycock’ Late Type Retro-fit Overdrive Complete
                                             Cross Member
                                             ‘Silent’ Mounting Blocks
                                             Support Brackets & Clamps Etc
                                             Chassis Clamp Adhesive

Rear Propshaft:               Suitable Diff Pinion Adaptor Flange
                                             Standard Splined Sliding Joint, Universal Joint &                                              Shaft

Speedometer Drive:      Gear Box Blanking Cover
                                             Cable Adaptor Complete
                                             Speedometer Extension Cable Complete

Electrical:                          Manual Switch with Escutcheon
                                             Inhibitor Switch and Bracket
                                             Fuse Box
                                             Relay
                                             Complete Wiring Harness with Support Clips

Literature:                         Fitting Instructions
                                             Wiring Diagram
                                            12 Months Warranty

   Servicing:
The use of standard approved gearbox oil is recommended for use in the Overdrive and that the oil should be drained and replenished at the same time as the gearbox oil.
 

Click here to download the Brochure and Order Form.

To Order:
 Kindly measure your vehicle and enter the dimensions/information as appropriate.

Because each Overdrive Package is tailored to individual specifications, please enclose a deposit of £500.00 with your order.  Factory lead time are usually two to three weeks.