Hi (1972 series 3) Gearbox suffix A I have just had the gearbox out to replace the layshaft bearings. I Split the gear box from the, transfer box, bell housing and removed the layshaft to replace the fore and aft bearings. Re assembled with new gaskets etc and reinstalled. All good so far. Gearbox nice and tight, can select all gears fine. However when I engage high range it now keeps jumping out into neutral. Low range is fine with no problems.
The strange thing is that I didn't touch the transfer box other than removing transfer gear to detach the gearbox and then to reassemble the whole gearbox. High / low ratio was perfectly selectable before and all components have been reinstalled as they were before. Thanks for any help...