My 110 was originally a 2.5d. The PO converted it to a 200tdi (in the UK) in large part because apparently the existing gearbox was bad. He sourced a 200tdi disco and swapped the drivetrain (including transmission) over. Consequently the disco gearbox lever is coming up through the front of the seatbox. The existing gearbox feels OK with the 2nd gear synchro in the expected state of crankiness, but there's no rush to swap it out save to position the shifter in the "right" place.
I happened upon a defender LT77 locally that I picked up today more out of opportunity than anything else. The owner drove with it for a few thousand miles and said that it shifted fine, "except for an occasional thunk when it was cold that may have been due to a very worn clutch". The mainshaft splines look remarkably good, but what else can/should I do (up to a rebuild) to ensure that it's in good shape while I have time? I've read up on the rebuild documented here
. Is there a good way to inspect this thing short of a complete teardown to ensure it's in good shape before an eventual swap? How nasty a job is a complete rebuild? I see Ashcroft sells a kit
Best next steps?