Rick the Spud Posted December 14, 2008 Share Posted December 14, 2008 bought a cheapy Disco for off roading and field/farm activities so don't really want to spend too much time/money on it, but i would like to investigate a few gearbox issues before it costs me a new box - prevention is better than cure, so i would rather spend a few quid on it now, rather than a few hundred later on! the gearbox itself crunches in most gears, which feels like the synchros are gone, but if ur careful and pause while changing up u can get away with it, not changing down though. there is also a squeak coming from underneath (dry bearing sort of noise) which comes and goes - it's speed related, and goes instantly when u dip the clutch. Not sure if it's related, but if u engage the diff lock, u get a cog grinding sort of noise, and it doesn't seem to get u any less stuck so it may not be engaging! that's a lot of info - any ideas anyone? Quote Link to comment Share on other sites More sharing options...
cipx2 Posted December 16, 2008 Share Posted December 16, 2008 Try to change the oil in the gearbox (ATF Dexron III for the one you have). As for the noise, hard to tell from what you described. Try to find someone who knows more about LRs. There are some tests that can be done to get closer to the cause. Quote Link to comment Share on other sites More sharing options...
martinspragg Posted December 17, 2008 Share Posted December 17, 2008 I second changing the gear box oil. I had similar problems a few months ago and decided to replace the oil. The oil that came out looked old and worn out. It has made all changes (up & down) much smoother. I am planning on a second oil change in the next few days to ensure that the box is well flushed out. Quote Link to comment Share on other sites More sharing options...
Rick the Spud Posted December 19, 2008 Author Share Posted December 19, 2008 thanks for the replies guys. someone also said that halfrauds do something called molyslip that u can put in gearboxes? Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted December 20, 2008 Share Posted December 20, 2008 Tescos do bananas, that also works (or so second-hand car dealers tell me ) Quote Link to comment Share on other sites More sharing options...
cipx2 Posted December 20, 2008 Share Posted December 20, 2008 someone also said that halfrauds do something called molyslip that u can put in gearboxes? Any friction modifier you'll add to the oil will prevent the syncros do their job properly. The syncros are like clutches, they work based on friction. If you will add something that will make the oil more slippery, the syncros will need more time to match the speeds of the parts about to engage. The oil used in these gearboxes is a compromise between the low friction needed for the gears and bearings and the high friction needed for the sycros. If you want to experiment by altering this balance ..... Change the oil in the gearbox and make sure the clutch is working correctly. That's all you can do. Quote Link to comment Share on other sites More sharing options...
Snagger Posted December 20, 2008 Share Posted December 20, 2008 I suspect the squeak is a failing pro shaft UJ. Quote Link to comment Share on other sites More sharing options...
Rick the Spud Posted December 22, 2008 Author Share Posted December 22, 2008 prob just change the gear oil and see what happens... Snagger - how long will it squeak b4 it completely fails? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted December 23, 2008 Share Posted December 23, 2008 Snagger - how long will it squeak b4 it completely fails? In the case of a UJ - usually days only then there is an expensive and often dangerous bang and you need a new propshaft, and sometimes exhaust/floor etc! Quote Link to comment Share on other sites More sharing options...
Rick the Spud Posted December 24, 2008 Author Share Posted December 24, 2008 if it was the UJ wouldn't it do it all the time? - it's still going round when u dip the clutch - or is it just cos it's not loaded when u dip the clutch that makes it go quiet? could it just need greasing? Quote Link to comment Share on other sites More sharing options...
Les Henson Posted December 25, 2008 Share Posted December 25, 2008 Grease the U/J's - if the noise goes for a few days, then they are the problem. Les. Quote Link to comment Share on other sites More sharing options...
Rick the Spud Posted December 29, 2008 Author Share Posted December 29, 2008 yep - UJ. one of them is slack as a##e! anyone know how much one is? it's the one coming forward off the centre box thing (transfer box?) Quote Link to comment Share on other sites More sharing options...
BogMonster Posted December 29, 2008 Share Posted December 29, 2008 A non genuine one will cost you somewhere in the region of £10-15, but make sure you get an OEM branded one (one in a GKN or Hardy Spicer branded box for example) not a "no name no quality" effort. There are two different sizes, make sure you get the right one, not sure which one fits a 200Tdi Disco but somebody will no doubt be along shortly who will have the answer If its really slack don't drive it until you fix it or you will very shortly find it lets go which will f*** up the propshaft yoke and sometimes wipe out the exhaust and other expensive bits in the process so you'll need a new propshaft at the very least if that happens. Quote Link to comment Share on other sites More sharing options...
Rick the Spud Posted December 30, 2008 Author Share Posted December 30, 2008 cheers - and oops! was doing some of this sunday and it didn't let go! http://uk.youtube.com/watch?v=LWiVcHeJvYE will get it done asap though... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.