when we first got our caravan (jan 06.used with 116,000kms) it would granny shift and get right into 4 th with tc locked up by about 25 mph....
sheesh!!
old couple had it from new and the transmission "learned" to drive slow.....
i imagine the fuel economy was good but.........
after we had it for a week or so, all is well......
thank god for the ability for it to re-learn !!!