A mechanic who I trust was replacing a boot and axle shaft and while doing so lost some transmission fluid. (Not sure how they’re all connected)He hadn’t worked on S40’s with MT and wasn’t expecting a loss of fluid. There is a special tool needed to access the hex bolt so he can replace the lost fluid but the bolt is frozen stuck and broke his special tool. He isn’t sure how much fluid was lost and overfilling is not recommended but driving with low fluid can be just as bad. Does anyone have any suggestions or ever had this problem?