EVEN IF YOU'RE NOT DOING THE WORK YOURSELF, PRINT OUT COPIES FOR YOUR MECHANIC TO ELIMINATE ANY CONFUSION. INTRODUCTION t The overdrive is an additional gear unit between the gearbox and propeller shaft. Here are just a few LOW RESOLUTION Sample image From Adobe Acrobat Viewer (included on CD)ĪCTUAL IMAGES ON THE CD ARE HIGHER RESOLUTION AND CLARITYĪ MANUAL LIKE THIS IS A MUST FOR OWNERS OF THESE VEHICLES.

REBUILDING (BREAKDOWN, SERVICE & REASSEMBLY)ĭON'T BE CONFUSED BY OTHER LESS COMPLETE MANUALS *FITTING THE ELECTRICAL RELAY CIRCUITS & CONTROL PANEL * -SERVICING THE OIL PUMP & CHECKING THE SUN WHEEL END FLOAT I have had a Laycock J type mid mount OD in my 1976 Ford F250 with a 5.9 Cummins diesel,BW T19 trans and 3:73 rear since the early 90’s. * WE SHIP WORLDWIDE (see shipping rates below)ĭETAILED AREAS OF THESE UNITS ARE COVERED: The ENTIRE 45 PAGE Manual on CD in PDF format for easy viewing on almost any computer

ĬOVERS: IDENTIFICATION, OPERATION, BREAKDOWN/REASSEMBLY, SPECIFICATIONS AND STEP BY STEP SERVICE PROCEDURES In this case, a solenoid opens a valve which allows oil under the releif valves dashpot. TRANSMISSION MECHANICS WITH EXPERIENCE WORKING ON THESE UNITS IS RARE. COMMON IN THE AUSTIN 1000, TRIUMPH 20S, 20ST, VANGUARD & TRIUMPH TR2s, AND ONE OF THE OFTEN OVERLOOKED AREAS OF THESE VEHICLES, THE OVERDRIVES CAN BE COMPLICATED AND REQUIRE SPECIALIZED TOOLS & SERVICING. Laycock Overdrive TypeJ INDEX Introduction Working Principles Hydraulic System Lubrication System Fault Finding Diagrams Overhaul of Components on the Car Electrical Control System Relief Valve and Dashpot Assembly Pump Non-Return Valve Overdrive Removal Dismantling Main Sub Assemblies Clutch Sliding Member Planet Carrier. JUST ABOUT EVERYONE AGREES.DRIVE YOUR TRIUMPH or AUSTIN 1000 ENOUGH AND YOU MIGHT BE REBUILDING YOUR LAYCOCK NORMANVILLE OVERDRIVE. Laycock overdrive j type manual The Laycock hydraulic system and the solenoid circuit varied slightly according to the overdrive model type and its applications. This manual Includes Service & Instruction information for Laycock-de-Normanville Overdrive Units with Electrical Controls.

Laycock j type overdrive manual