Not the whole thing, but I (we) have a feeling it will have to come out for inspection. There is likely a problem with your 1st gear.. Synchro gears are usually made of brass, and help the drive gears line up when shifting. Since the brass is the softest part of the transmission, synchros are usually the first gear to wear.. 1st gear synchros usually go when the driver downshifts into 1st which is why 1st should only be used from a dead stop. If the 1st gear syncro were shot, only 1st gear would not line up right, and grind. If it were the clutch, the engine would climb while the speedo does nothing.. and that would happen in every gear, getting progessively worse as the load increased.