Hi folks - did some searching but not sure anyone here has something quite like my issue. I hope I am not looking at a transmission overhaul. I have a noise that is best described as a thumping sound - rhymical as speed increases, almost like a wheel out of balance (but they are not) - when accelerating even modestly. Does not occur every time I increase speed, but when it's at its worst, you can feel the thunk through the chassis. I could be imagining it, but it could be worse when accelerating in turns, making me think differential could be problematic.
I went to change the gearbox oil (I have no real history of the car, acquired it last year), and to my dismay, almost none came out. Maybe a few ounces. Unclear how many miles it had been driven like this. Filled the box back up per "spec" as detailed here on the forum. Sounded better immediately after, but it seems to be back and persistent.
Maybe the oil I added has worked into the gears and I need to top up again, but I'm afraid it's more likely what damage is already done. I will check that when I find some more time and a few old syringes.
I should mention that the car is now using an electric drivetrain after converting it over the last few months. I did not notice the noise during it's last gas-engine drive, but I think that's because the engine was so noisy. The electric motor has enough torque to start off (gently) in 3rd gear. Obviously if I give it the beans the clutch slips so I am driving very gingerly, generally not taking off much faster than when I had the old gas engine. The symptom is also there if I take off in 1st or 2nd.
Any thoughts? If it's differential related, are those replaceable parts in the US?
I went to change the gearbox oil (I have no real history of the car, acquired it last year), and to my dismay, almost none came out. Maybe a few ounces. Unclear how many miles it had been driven like this. Filled the box back up per "spec" as detailed here on the forum. Sounded better immediately after, but it seems to be back and persistent.
Maybe the oil I added has worked into the gears and I need to top up again, but I'm afraid it's more likely what damage is already done. I will check that when I find some more time and a few old syringes.
I should mention that the car is now using an electric drivetrain after converting it over the last few months. I did not notice the noise during it's last gas-engine drive, but I think that's because the engine was so noisy. The electric motor has enough torque to start off (gently) in 3rd gear. Obviously if I give it the beans the clutch slips so I am driving very gingerly, generally not taking off much faster than when I had the old gas engine. The symptom is also there if I take off in 1st or 2nd.
Any thoughts? If it's differential related, are those replaceable parts in the US?