Where to enter Peugeot 307 gearbox oil?

1= Top up point is on top of the gearbox housing behind the transmission selector lever. Its a round plug with a square hole stamped into it. To reach it you will meed to remove the air filter housing, battery and battery tray. Naturally the drain plug is on the underside of the gearbox housing!

2= The transmission has a level plug that is situated in the drain plug( its the smaller of the two). To check the level first start the engine and allow to idle. With the engine running retain the drain plug with a suitable spanner and slacken and remove the level plug in the middle. If there is sufficient fluid in the transmission, then it will trickle out the middle of the drain plug before slowing to a drip. If no fluid trickles out or just a few drips appear, then the level is too low and topping up is needed. Refit the filler plug then switch off the engine and add 0.5 litres, then switch the engine on and recheck the level by removing the level plug again. Once the fluid stops the level is correct!

4= If you do drain and refill the Transmission Fluid then the fluid wear sensor will have to be reset. This is what tells the ecu to flash the snow and sport mode lights when the fluid needs changing. This can be done by a Peugeot dealer or someone with suitable equipment!