93 tarago speedo out by 20kms

[Corolla-tarago]

Hi guys joined the group to get some advice for my aunties Rago. She bought the car about 2 years ago from an auction and her friend took it to a mechanic who apparently changed the "dash" (assuming she means instrument cluster) don't know what the reason was for changing it or what ever. But now speedo is out by 20kms and oil low light stays on but oil is full. I'm pretty sure these font have a speedo cable? So I'm thinking either is a sensor on transmission or the mechanic that played with the cluster may have changed the internals of the cluster and moved the needle. Any help or advice would be much appreciated. Cheers

[legless1]

Hi guys joined the group to get some advice for my aunties Rago. She bought the car about 2 years ago from an auction and her friend took it to a mechanic who apparently changed the "dash" (assuming she means instrument cluster) don't know what the reason was for changing it or what ever. But now speedo is out by 20kms and oil low light stays on but oil is full. I'm pretty sure these font have a speedo cable? So I'm thinking either is a sensor on transmission or the mechanic that played with the cluster may have changed the internals of the cluster and moved the needle. Any help or advice would be much appreciated. Cheers

have a bugged speedo fair guess. I would say used speedos pot luck. tarago most are 5/6kms out from new