I have a whine and would like suggestions on how to pinpoint it and fix.
I believe (and have been told) it is probably the trans front bearing.
It whines at idle, with the transaxle in neutral. If I depress the clutch pedal completely, the whine stops. If I put light pressure on the clutch pedal, there is no audible change (so I don't think it's the throw-out bearing).
Is it likely the front bearing? If yes, can it be checked and replaced the next time I do a gear change? Or does the trans need to be separated from the engine for access and replacement? Any special tools needed?
I admit I have not spent time looking at Hewland manuals to get an answer. Thought I'd ask here first.
The only things spinning in neutral are the layshaft and dog gears so a whine could be either the layshaft front bearing, layshaft rear bearing, reverse idler, or one of the needle bearings under a gear.
Check them all visually, look for marks on the shaft and hubs where the needle bearings run, and also, check the backlash and teeth on the reverse idler gears. If everything looks OK put the gearbox back together with no dog gears to narrow it down to one or the other shafts.
If it does turn out to be the layshaft front bearing, which is very possible as its the smallest bearing in there, they are usually changeable with the box in the car, it may take a little fiddling to get the old one out but it can be done, if its one of the others then its a cakewalk!
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Ditto what Keith said.
Changed gears for a new track but didn't start car before going to that track and discovered the "whine" during morning warm-up. Finally figured out it was a mismatched gear (turned out to be 4th gear on a track so short that no one was using 4th!! Of course I didn't learn that until the afternoon).
Two things to look at first. With the clutch in the gear sets are stationary so it could be a gear set problem. First you cannot use a gear set that has one Hewland gear and one Webber. For example if you are installing a 23:32 both gears must be either Hewland or Webber or they will make noise. There are also some combinations of gears that will allow you to assemble with a driven gear of one ratio and a driving gear from another gear set. Check all the gears to see that each gear set is properly matched then if all that is right the bearings would be the next place to look.
Murray Chalmers Miss Lola's kept man.
I finally got around to looking inside my gearbox tonight and found the layshaft front needle bearing had started to lose rollers. Most were still in place, so I might be lucky and get away with a simple replacement. Looks like the old one can come out with some decent circlip pliers. Layshaft looks okay.
Thanks, Lee. I"ll plan to call you in a day or so.
I've always used Redline Shockproof Lightweight, but interestingly, my last gear change I used a qt of Synergen SynGear (because I had some left from my FA ownership a few years ago). I assumed if the SynGear was good for the FA Staffs, it'd be okay for the FF Mk 9.
What do you recommend for an Mk 9 in a FF?
I came to find out from a FF expert that if you use Mobil 1 or equal you should add 1/2 of a small bottle of Zinc additive to the lube. Some of us have been having problems with the bearing cages wearing pre-maturely! Some gear lubes have it already. I use it in both my RF83 and DB6.
Last edited by schiconst; August 29th, 2012 at 5:55 PM.
Reason: added info!
Ok, this seems to b a good thread to ask... I have an LD200. When I pull the fill plug on the top and look in, how high on the gears should the oil be? Cover all the gears?
1990 Van Diemen, the Racing Machine, CM AutoX, WRX(retired)
You can try to make a street car into an autocrosser or you can do a lot less work and make a race car into a great autocrosser
The oil in your LD box will not "cover" the gears but be picked up by the partially submerged lower set of gears and carried on to the upper set.
I still, after 40 years, only use one quart of lube (I prefer Redline Shock-Proof Light) per gear change in both the Mk4-6-8-9 series and the LD200 Hewland gearboxes.
I'm not an expert on the Staffs.
I've had many customers who have run that gearbox, also use the Redline Shock-Proof Light lubricant, in applications where you might have used either of those two Hewland gearboxes.