I have heard that the unit can be disassembled in place in this case, but have never had the pleasure, myself. It reduces the overall gearing by 20 on 3rd and 4th gears. Welcome to another tech talk, this one on the rebuild of the M41 Laycock Overdrive in a 1967 Volvo Amazon P220 station wagon.I count 21 small rollers in the.
Overdrive is an additional 'epicyclic' gearbox bolted at the back of the normal gearbox (necessitating a shorter propshaft). More than one promising junkyard unit has been left behind for this reason. The GT6 has aways been offered with an optional Laycock de Normanville D-Type overdrive. It can still be a struggle to remove, in the car, if this detail is omitted. This is much worse if the whole transmission is out of the car. I have seen a few cases where the overdrive unit was all but impossible to remove from the transmission because of internal pressures that couldn't be released. A customer LH overdrive unit that was filled with 90 weight oil pulsed between direct drive and overdrive without even being. You can also remove the driveshaft, and accomplish the same thing. This will relieve any torque that remains, and should allow the unit to slide off the transmission output shaft easily. Reseal kit with cone clutch, Will fit All P type Laycock overdrives. 'If you are going to remove the overdrive, it is highly recommended to drive the car and shift it into overdrive and then, with the clutch pedal depressed, disengage the overdrive.
