1998 GS manual Previa with 140k on clock. Has recently started slipping in 4th gear - if changing up from 3rd or down from 5th its asthough something isn't engaging and no further power from the car can be reached then it stops slipping and seems to engage and the gear is fine most of the time. At times if increasing the accelerator the slipping seems to happen again whilst still in the same gear. Any ideas please? Thanks

Thanks for the really prompt reply... not knowing much about engines am I right to think this is an expensive problem to put right if the car goes into a garage to have done and with the age and mileage am I best to leave well alone and try to change the car? If the transmission is failing what happens next- do other gears start to fail or will it fail totally? I can't repair the car myself so will need to make some hard decisions if it is an expensive problem..ouch! Thanks for the really prompt reply... not knowing much about engines am I right to think this is an expensive problem to put right if the car goes into a garage to have done and with the age and mileage am I best to leave well alone and try to change the car? If the transmission is failing what happens next- do other gears start to fail or will it fail totally? I can't repair the car myself so will need to make some hard decisions if it is an expensive problem..ouch!

Chances are it will be cheaper to replace the vehicle.. Chances are it will fail totally at some point.. I would recomend having it looked at by a transmission shop and have them look at it. It could be an easy fix, or might not . either way having it looked at will be your best bet Chances are it will be cheaper to replace the vehicle.. Chances are it will fail totally at some point.. I would recomend having it looked at by a transmission shop and have them look at it. It could be an easy fix, or might not . either way having it looked at will be your best bet