Vehicle & Technical > Defender
Diff ratios
Terranosaurus:
--- Quote from: "clbarclay" ---I have a cunning plan :(scared):
What if you remove the front propshaft from the transphere case, apply the handbrake, stick the gearbox in 4th (1:1 ratio) and whalst someone else counts the number of turns on the front output of the transphere case, you turn the the engine over manually for a number of turns. The more turns you can bear to do this for the more accurate the result will be provided neither of you lose count. Marking both crankssft pully and transphere case output with a bit of paint would make it easier.
Knowing the number of turns of the of the engine (ecentially the number of turns of the transphere case input) for a number of turns of the transphere case output you can work out the ratio of the transphere case.
Because of the action of the diff and the lock rear output the number of turns of the front output would bave to be halved to get an accurate figure or altenitively chock the wheels, disconnect both propshafts from the transphere case and engaged the difflock. But this would mean more work.
--- End quote ---
To check diff ratios - jack up one rear wheel and turn rear prop by hand, counting number of revolutions of the diff flange to acheive 2 (cos of open diff) revs at the wheel - much easier, don't even need a spanner for that.
extreme90:
--- Quote from: "sptb" ---
--- Quote from: "clbarclay" ---I have a cunning plan :(scared):
What if you remove the front propshaft from the transphere case, apply the handbrake, stick the gearbox in 4th (1:1 ratio) and whalst someone else counts the number of turns on the front output of the transphere case, you turn the the engine over manually for a number of turns. The more turns you can bear to do this for the more accurate the result will be provided neither of you lose count. Marking both crankssft pully and transphere case output with a bit of paint would make it easier.
Knowing the number of turns of the of the engine (ecentially the number of turns of the transphere case input) for a number of turns of the transphere case output you can work out the ratio of the transphere case.
Because of the action of the diff and the lock rear output the number of turns of the front output would bave to be halved to get an accurate figure or altenitively chock the wheels, disconnect both propshafts from the transphere case and engaged the difflock. But this would mean more work.
--- End quote ---
To check diff ratios - jack up one rear wheel and turn rear prop by hand, counting number of revolutions of the diff flange to acheive 2 (cos of open diff) revs at the wheel - much easier, don't even need a spanner for that.
--- End quote ---
that would give in-accurate results :wink:
friction between bearings and hub, break pads against disc
everything has to be free so no friction to variate results
best way is to only have the h/s in and count the no of turns on that :wink:
you have checked wheel balance aint you ?
cant see it bein but our old 200 disco wouldnt do anything above 55 turned out be the wheels bein so off balance and no the steeringwheel didnt wobble
clbarclay:
--- Quote from: "TheBlueySilverThing" ---
--- Quote from: "sptb" ---
--- Quote from: "clbarclay" ---I have a cunning plan :(scared):
What if you remove the front propshaft from the transphere case, apply the handbrake, stick the gearbox in 4th (1:1 ratio) and whalst someone else counts the number of turns on the front output of the transphere case, you turn the the engine over manually for a number of turns. The more turns you can bear to do this for the more accurate the result will be provided neither of you lose count. Marking both crankssft pully and transphere case output with a bit of paint would make it easier.
Knowing the number of turns of the of the engine (ecentially the number of turns of the transphere case input) for a number of turns of the transphere case output you can work out the ratio of the transphere case.
Because of the action of the diff and the lock rear output the number of turns of the front output would bave to be halved to get an accurate figure or altenitively chock the wheels, disconnect both propshafts from the transphere case and engaged the difflock. But this would mean more work.
--- End quote ---
To check diff ratios - jack up one rear wheel and turn rear prop by hand, counting number of revolutions of the diff flange to acheive 2 (cos of open diff) revs at the wheel - much easier, don't even need a spanner for that.
--- End quote ---
that would give in-accurate results :wink:
friction between bearings and hub, break pads against disc
everything has to be free so no friction to variate results
best way is to only have the h/s in and count the no of turns on that :wink:
you have checked wheel balance aint you ?
cant see it bein but our old 200 disco wouldnt do anything above 55 turned out be the wheels bein so off balance and no the steeringwheel didnt wobble
--- End quote ---
Sorry, was something lost in translation, Iwas on about the transphere case ratio, not diffs.
extreme90:
](*,) ](*,) ](*,)
afink av worked to many hours today :oops:
even so, can see it being gear ratio's some how :?
Xtremeteam:
--- Quote from: "TheBlueySilverThing" ---](*,) ](*,) ](*,)
afink av worked to many hours today :oops:
even so, can see it being gear ratio's some how :?
--- End quote ---
PMSL
just do it the way previously described by puting it into 4th gear with difflock in & turn the engine over by hand,
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