Simon Smith Posted November 16, 2008 Share Posted November 16, 2008 I had a new Ashcrofts gearbox fitted a couple of months back. Together with a new clutch. Six months earlier I had just had a new clutch, master cylinder, slave cylinder and hose. But the clutch was replaced again due to the gearbox leaking oil all over it which got baked on like tar. Now I seem to have no synchromesh on third gear unless I drive for an hour and get everything really hot. I can change through all the other gears perfectly, but changing down from 4th to third is almost impossible except at almost a standstill. Even double declutching has no effect at all. Checked the fluid and the free play adjustment today which made no difference. Its going over to AJS on Friday to be looked at, but meanwhile any ideas? Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted November 16, 2008 Share Posted November 16, 2008 Sounds like the synchro ring is for some reason sticking on the synchro hub....... and only releasing when really warmed through...... tis a nightmare when it's one of those things that means it has to come right apart to see whats going on...... and even then, it might not be obvious...... worth fitting a new synchro ring whilst it;'s in bits anyway... as the fault is in that area somewhere...... Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted November 17, 2008 Author Share Posted November 17, 2008 That's what I thought, the gearbox is under warranty anyway, so it's not really a problem, just wondered if anyone had had this before. Quote Link to comment Share on other sites More sharing options...
western Posted November 17, 2008 Share Posted November 17, 2008 what oil is in it, only use ATF or MTF94 in LT77 or R380 boxes anything else cause problems for the internal oil pump Quote Link to comment Share on other sites More sharing options...
reb78 Posted November 18, 2008 Share Posted November 18, 2008 Any reports on what was the cause of this gearbox problem. Mine is a similar story - LT77s recon box fitted, new clutch, ATF, correct level - tricky change (it crunches) from 4th to 3rd when slowing down over 30mph. Under 30 4th to 3rd and it will go in, but with a little more pressure than normally necessary. it was initially a tricky change up to 3rd and 4th, but i adjusted the bias and this is fine now, just the gear crunching.... Getting a little tired of it now - i just want to drive it for a bit before the next thing goes wrong!!!! At least i've got the heater working ok! Quote Link to comment Share on other sites More sharing options...
patch1 Posted November 18, 2008 Share Posted November 18, 2008 My R380 box has got a nasty change from 1st to 2nd all others are ok ish, might be the 270,000 miles on it but not noisy or clonky in any way. Must av a good one as I was once told that all LT77 and R380s need rebuilding every 100,000 as the output shaft an gear wares. Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted November 20, 2008 Author Share Posted November 20, 2008 It has ATF in it. Its going in tomorrow so they can have a drive and for the MOT so I suppose I better wash some of the mud off it It was sticky to change up too, but adjusting the bias fixed that. It has now started occasionaly crunching changing up to 3rd, but changing down to 3rd is virtually impossible above about 15mph. Having checked everything else, I am now convinced the fault is the sychro rings, if so it will have to come out again as towing the trailer is near impossible. Quote Link to comment Share on other sites More sharing options...
reb78 Posted November 20, 2008 Share Posted November 20, 2008 It has ATF in it. Its going in tomorrow so they can have a drive and for the MOT so I suppose I better wash some of the mud off it It was sticky to change up too, but adjusting the bias fixed that. It has now started occasionaly crunching changing up to 3rd, but changing down to 3rd is virtually impossible above about 15mph. Having checked everything else, I am now convinced the fault is the sychro rings, if so it will have to come out again as towing the trailer is near impossible. Keep us posted on what the result is.... Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted May 14, 2009 Author Share Posted May 14, 2009 Well, I have been struggling with this useless gearbox for nearly a year now, It was fitted in June '08 and I reported the first gearchange difficulties the following week. I adjusted the bias springs and was told that "it needed to be run in" It was supplied with bolts missing in the first place, has been a problem all the time I've had it, and now I'm told I will have to pay to have it removed, sent back to be repaired and refitted. This is more than a weeks wages for me so is a no go for starters. Apparently this is called a "warranty" Starting to get angry now. Quote Link to comment Share on other sites More sharing options...
reb78 Posted May 14, 2009 Share Posted May 14, 2009 Well, I have been struggling with this useless gearbox for nearly a year now, It was fitted in June '08 and I reported the first gearchange difficulties the following week. I adjusted the bias springs and was told that "it needed to be run in"It was supplied with bolts missing in the first place, has been a problem all the time I've had it, and now I'm told I will have to pay to have it removed, sent back to be repaired and refitted. This is more than a weeks wages for me so is a no go for starters. Apparently this is called a "warranty" Starting to get angry now. Have you spoken directly to Ashcrofts? I did with mine (i'd fitted it myself) and they couldn't have been more helpful to resolve the issue. My reverse gear plunger was faulty. There was no need to do anything with the 3rd gear problem i'd had - the change down into third has improved as the box was run in. Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted May 15, 2009 Author Share Posted May 15, 2009 Been told today after speaking to Andy at AJS that it's not going to cost me anything now. Hopefully the gearbox will be repaired this week. Quote Link to comment Share on other sites More sharing options...
reb78 Posted May 15, 2009 Share Posted May 15, 2009 Nice one Quote Link to comment Share on other sites More sharing options...
jimmy_neutron Posted May 15, 2009 Share Posted May 15, 2009 Been told today after speaking to Andy at AJS that it's not going to cost me anything now.Hopefully the gearbox will be repaired this week. What age is the van ?? LT77 or R380 box ? Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted May 15, 2009 Author Share Posted May 15, 2009 Its a '92 Lt77 Looks like I will be using the bike next week 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.