There is a bullet connector in the white/red between the ignition switch and the starter solenoid (68 and 69 models) or the relay (70 and later) on Mk2 CB cars, which is where the transmission safety switch/starter inhibitor wires are connected when the automatic gearbox is fitted. However it's much easier doing that with a 5-main engine than a 3-main as described by Paul Walbran. 4-sync gearboxes are occasionally installed in Mk1 bodies as they are more plentiful and cheaper than 3-synch, in which case the large removable panel on top of the tunnel has to be extended to move the gear lever hole back. Mk1 cars are most easily recognised from the tunnel, which has a hump round the gear lever whereas 4-synch tunnels are flat. Reverse will crunch on both 3 and 4-synch. Originally Mk1 cars were fitted with 3-synch gearboxes, and the primary recognition factor of those is if they crunch when you try to select 1st gear when moving. Different lengths for different gearboxes, more info here. with a plain shank to give a dowelling function to correctly align the two. On the 4-cylinder 4-sync there are seven UNF bolts securing the gearbox to the engine - 'bolts' i.e. Overtightening screws can cause covers to warp between adjacent bolt holes and leak more, check they are flat before fitting. Great gobs of it will get extruded out into the works and in the screw holes can rip paper/card/cork gaskets as they are tightened.

Use something non-hardening such as Loctite MR5922, and only a thin smear. Gasket sealants - don't use silicone-based as they 'go off' very quickly and on large areas will 'skin' before you can get the surfaces together and not spread out to an even thin coating. Thank you.ģ-Synch_or_4-synch? Automatic Bell-housing_Bolts Breather Drive_Flange Clutch_Pilot_Bush Gear_Lever Gearbox_Removal How_It_Works Interlocking_Arm_Assembly Internals Lubricants Mounts_and_crossmember Oil_Change Overdrive:_D_and_LH_Type_Differences Overdrive_Electrics Overdrive_Fusing Overdrive_'Pulsing' Overdrive_Replacement Overdrive_Sequencer_Relay Overdrive:_How_many_were_there? Rear_Seal Reversing_Light_Switch Speedometers Torque_Values Links To help offset the costs of providing it. You may like to make a small contribution Miscellaneous Downloadable PDFs The sectioned MGB at the British Motor Museum, Gaydon Contents Index So you think you want an MGB or V8?īody Brakes Clutch Cooling Electrics Engine Fuel Gearbox Heater Ignition Propshaft Rear axle Steering and Suspension Wheels and Tyres

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