whereswaldo583
New Member
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- Boulder, Colorado!
in my defender v8, anytime i shift into 2nd gear while its still revved over 2500 rpm, itll grind as i shift into the gear. is this a common problem, or is it specific to my landy??
know what really grinds my gears...
- Thread starter whereswaldo583
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fredlander
New Member
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Try changing slower and "double de-clutching"
Fred.
Fred.
whereswaldo583
New Member
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- 254
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- Boulder, Colorado!
whats double de cluching??, and its a pain having to change in lower rpms.
discomania
Well-Known Member
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- 6,947
The baulk rings may well be worn, and second gear is the one to go before the others, as it gets most use for a number of reasons.
Synchromesh on a gear is a little metal ring CLUTCH-cum-BRAKE that causes friction between the two parts you are trying to engage. The ring has shaped LUGS on it that will PREVENT engagement unless and until the two parts are rotating at the same speed. The "baulk ring" is a wearing component because it works by friction, although well-oiled.
In the olden days, cars had NO synchromesh, and often the gears were not even of the "constant mesh" type, so all gear changes required great skill on the part of the driver, especially changing down, which needed a technique known as "double-de-clutching". These were, and still are, known as "crash" gearboxes for obvious reasons!
Cars usually had no synchromesh on some gears till fairly recently, usually first, the assumption being you would never need first again after driving away from a standing start, so why fit expensive synchromesh? LandRovers had no synchromesh on first or second gears for many years, only having it on 3rd and 4th.
Gearbox damage and destruction increased as driver skills decreased. The car-makers realised it was cheaper to fit synchromesh than to pay the warranty claims.
If you develop good timing when changing gears, you don't need synchromesh at all, but to change DOWN you will need to learn how to double-de-clutch.
It is quite easy to drive a car up through all the gears and down again WITHOUT USING THE CLUTCH, but I suggest you don't try it until you are good at getting your gear changes at bang on the right time.
Match the engine speed to the roadspeed when changing gear, and all will be better. INCREASE engine speed when changing DOWN. It is very good for the gearbox because it saves the synchromesh from doing most of the work.
Synchromesh on a gear is a little metal ring CLUTCH-cum-BRAKE that causes friction between the two parts you are trying to engage. The ring has shaped LUGS on it that will PREVENT engagement unless and until the two parts are rotating at the same speed. The "baulk ring" is a wearing component because it works by friction, although well-oiled.
In the olden days, cars had NO synchromesh, and often the gears were not even of the "constant mesh" type, so all gear changes required great skill on the part of the driver, especially changing down, which needed a technique known as "double-de-clutching". These were, and still are, known as "crash" gearboxes for obvious reasons!
Cars usually had no synchromesh on some gears till fairly recently, usually first, the assumption being you would never need first again after driving away from a standing start, so why fit expensive synchromesh? LandRovers had no synchromesh on first or second gears for many years, only having it on 3rd and 4th.
Gearbox damage and destruction increased as driver skills decreased. The car-makers realised it was cheaper to fit synchromesh than to pay the warranty claims.
If you develop good timing when changing gears, you don't need synchromesh at all, but to change DOWN you will need to learn how to double-de-clutch.
It is quite easy to drive a car up through all the gears and down again WITHOUT USING THE CLUTCH, but I suggest you don't try it until you are good at getting your gear changes at bang on the right time.
Match the engine speed to the roadspeed when changing gear, and all will be better. INCREASE engine speed when changing DOWN. It is very good for the gearbox because it saves the synchromesh from doing most of the work.
