When you say it won’t go in do you mean there’s resistance at the gate where 4th gear is or it grinds when you try? Will it go into 4th gear parked up with the engine off?
When you say it won’t go in do you mean there’s resistance at the gate where 4th gear is or it grinds when you try? Will it go into 4th gear parked up with the engine off?
Bit beyond my pay grade that one, I leave gearbox rebuilding to the professionals. For me it’d be either replace with a low mileage box and take a chance or hand the box over for a rebuild. All depends on budget + how long it can be off the road for