Hi all,
Some advise please on some interesting transmission noises if you don't mind.
Series 2a 88, 3.5 flapper, suffix D gearbox, 3.54 Range Rover axles
Initial problem - Rattle / classic marble noises / chattering present when accelerating in 2nd gear, all other gears had no noise present when selected. Noise present in 2wd and 4wd, low and high ranges. No issues with selection in any fwd / reverse gears, no slipping out of gear on overrun, No whines or other rumbles, oil condition good (no swarf, bad smell, discolouration) in both gearbox and transfer box.
Noise not present in neutral, clutch depressed or up, or with high, low or neutral selected. Rpm change would not produce any noises either.
Upon investigation the main-shaft nut was loose by 1/2 turn, installed new nut and locking tab, torqued, noises still present. Decided to remove the transmission and strip / inspect.
Results - First motion shaft bearing race had collapsed, thrust bearing was noisy when spun, 3rd/4th syncro hub had some slight wear present, everything else looked acceptable. Reassembled everything with new parts as listed above. Set the pre load on the output shaft bearing with new shims.
Test drive - Now rattling in every gear under acceleration, noises diminish with higher rpm / reduction in load. 1st gear whines more than I remember. From what I have now read in other posts Layshaft bearings can give trouble, should have replaced these I know but hind sight n all. Any chance this could be output shaft bearing related? ie. re adjust of pre-laod?
Next step prop-shaft removal for front axle for UJ inspection but any other advise would be appreciated.
Thanks