Gearbox - Lancer Mitsubishi Cars & Trucks

No but check with the dealer or your service/owner manual for the manufacturer recommended gearbox oil change periods.
There is no filter on the manual gearbox .
Whatever the manufacturer recommended period is for a gearbox oil change, change the gearbox oil twice as frequently as recommended to maintain it in good condition. If, for example, a change every 50000 miles is stipulated then do it every 25000 or so.

1 Remove battery earth cable.
2 Remove gear shift lever - usually just pulls out.
3 Remove starter motor.
4 Remove bolts holding prop shaft to gearbox final drive, and remove the prop shaft.
5 Remove all bolts around bell housing holding bell housing to engine.
6 Slide gearbox back to slide spigot shaft from clutch plate.
7 Slide gearbox from under vehicle.
Gearbox is now removed out.

Park the vehicle in a clean dry well lit place. Work with safety in mind. Its always good to take pictures as you strip the/ a assembly. Refer back to pictures if you get stuck. Dis-connect the battery. Remove the gear linkages and speedo-drive and power cables from the gearbox. Remove the starter motor. Loosen the propshaft. Mark the yokes of the propshaft- for upon installation to avoid an unbalanced propshaft. Loosen the centre bearing. Remove the propshaft. Remove the cross member underneath the gearbox if there is one. Loosen bolts around the gearbox to cylinder block. Use a gearbox jack to support the gearbox. Take the bolts out from the gearbox to cylinder block. Pull gearbox backwards. Lower the gearbox. This is pretty much the standard way of removing gearbox. Note, there might be a transfer box, normally with 2 propshafts. Mark the yokes. Remove propshafts, transfer box and then gearbox. Remember to always work safe.

There is a seal in the gearbox and this has been damaged so oil is leaking past it out of the gearbox. You will have to carefully replace this seal, to do this you need to take the gearbox out of the car, put it on a bench and carefully remove the old seal and press in a new one.

First off what's the vehicle year..make.. and model?

Change the gearbox oil first that can slow gear change

406 comes normally with a gearbox model BE3 of 5 speed (as limited were with 6 speed). As late models of 405 and 306 are using the same gearboxes. Mazda 2.0i zx was sharing the same gearbox (i don't know exactly the model year).
Anyway, you need the exact gearbox model to find out which car model else were built with these types of gearboxes. Manual gearboxes with same models can be exchanged from any car or van and have nothing to do with car ECUs.

You may have torn the splinds on the drive shaft at the gearbox end.Remove and check.If there ok then the diff is your problem and its incased in the gearbox housing.

A gearbox from the same year and model is a direct fit. From the donor car you will need the center console to change the shifter over.

remove the carpet on the floor, remove the gear shift lever as well as the 4wd shift lever, remove the drive shaft (both) remove the bell housing bolts, remove the starter, place a hydraulic lift jack below the gear box , then remove the wiring connectors , then remove the cross member , then pull the gearbox out from its positin, drop the gearbox very carefully, when gearbox is on the floor, make sure its sittin on a up right position so it dose not spoil any of the elctric connectors especially the reverse light switch...(that seems to be the easiest way to remove a manual land cruiser gearbox) hope that wil help....