Just do be very careful to not engage overdrive in reverse, as doing so could damage the unidirectional clutch. MGB 3-sync, non-overdrive transmission, rebuilt by University Motors. This too will prove whether your problem lies in the 3/4 switch. Tell us about your vehicle to find the right parts faster. Laycock overdrive was only ever an option during the MGB’s chrome-bumper era, but can transform the car’s usability.
The overdrive should now engage positively (in all four forward gears, incidentally, although it's good practice to not engage it in first or second). The four-speed ‘boxes are hardy, although early units lack synchromesh on first and reverse. The other thing you can try is to disconnect the bullet connector from the wire going to the overdrive solenoid and rig up a temporary wire and switch, from the cockpit down through the gearstick hole, and directly to the solenoid. This unit operates on second and top gears on the Vanguard and Renown range, but on top gear only on the Triumph TR2, which has a four-speed gearbox. There is a cam collar mounted on the main shaft to drive the overdrive unit pump. It is a right swine to refit if you don’t know the trick.
#Mgb laycock overdrive drive in reverse manual#
This may provide more positive engagement of the overdrive, and will provide proof that the switch needs adjustment. The Laycock de Normanville Overdrive Unit fitted to the above models is electrically operated at the touch of an electric switch. The Haynes manual simply says to refit as removal which is absolutely useless. First thing to do is to drive the car in third gear and, with the overdrive turned on, put a little rightward pressure on the gearstick. We have received some interesting emails over the last few months asking (and telling) us about the proper way to shift in and out of overdrive on the Laycock deNormanville overdrives as used on the British cars (A, J, LH, D and. But since it is difficult to access, there are a couple of easier things you can try first. April 2003 Topic of the Month Proper shifting of a Laycock overdrive OK everybody, calm down out there. Yes, removing the washer will put the plunger of the overdrive switch down deeper, making it more likely to provide continuity.
For Ford engined cars, I believe TVR used a stand alone unit mounted behind the transmission.
Anyone who owns an older sports car must sometime consider retro-fitting an overdrive.
#Mgb laycock overdrive drive in reverse full#
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