i have a toyota corona AT170, 1991 model with automatic transmission. Around one year back, it had a problem where, when put to the reverse gear, took around one minute to actually move back. This was repaired by replacing some rubber rings and metal plates inside the gearbox. After this repair, the reverse problem was solved, but slippage between wheels and engine increased considerably. Now engine shows an RPM of around 2500 for low vehicle speeds like 20-30 km/h. Along with this, the fuel consumption has dropped significantly to around 5.5 Km per liter. does any one has an idea about the cause? if so, is it easily repairable or should i consider fitting a new gearbox?
thanks