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Sorry lads the JD is a wonderful tool for making yours eyes go out of focus.
Rear Diff, Viscous Coupling HELP
- Thread starter adamrharding
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SpudH
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While 100% right on the RRC, I'm not claiming too much credit on the P38, after all a stopped clock is right twice a day
After sleeping on it and reading/staring at the P38 diagram a few more times I've gotten my head around the P38 arrangement.
I couldn't see where the rear output shaft was splining into, but I have it now (In my defence it's not clear from the diagram, but it's spelled out clear enough in the text).
The planet gear carrier (rear ouput) and sun gear (front output) rotate in opposite directions to give differential movement the same as the pinion gears in a normal diff. The VC simply resists this opposite twist, forcing the whole outer gear to rotate with the sun and planet gears locked together.
So while completely different to the RRC, operationally it is identical.
Simple after you've scratched a bald patch onto your head and gone bleary eyed from staring at flippin RAVE :doh:
After sleeping on it and reading/staring at the P38 diagram a few more times I've gotten my head around the P38 arrangement.
I couldn't see where the rear output shaft was splining into, but I have it now (In my defence it's not clear from the diagram
, but it's spelled out clear enough in the text). The planet gear carrier (rear ouput) and sun gear (front output) rotate in opposite directions to give differential movement the same as the pinion gears in a normal diff. The VC simply resists this opposite twist, forcing the whole outer gear to rotate with the sun and planet gears locked together.
So while completely different to the RRC, operationally it is identical.
Simple after you've scratched a bald patch onto your head and gone bleary eyed from staring at flippin RAVE :doh:
Last edited:
- Posts
- 58,170
- Location
- Preston Lancs.
While 100% right on the RRC, I'm not claiming too much credit on the P38, after all a stopped clock is right twice a day
After sleeping on it and reading/staring at the P38 diagram a few more times I've gotten my head around the P38 arrangement.
I couldn't see where the rear output shaft was splining into, but I have it now (In my defence it's not clear from the diagram
The planet gear carrier (rear ouput) and sun gear (front output) rotate in opposite directions to give differential movement the same as the pinion gears in a normal diff. The VC simply resists this opposite twist, forcing the whole outer gear to rotate with the sun and planet gears locked together.
So while completely different to the RRC, operationally it is identical.
Simple after you've scratched a bald patch onto your head and gone bleary eyed from staring at flippin RAVE :doh:
It also helps if your not looking at it through the bottom of a JD glass i find. Pretty simple when all the haze goes away. If i ever mention a transfer box again feel free to tell me to shut up.
Datatek
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It also helps if your not looking at it through the bottom of a JD glass i find. Pretty simple when all the haze goes away. If i ever mention a transfer box again feel free to tell me to shut up.
Blimey Tony, I never thought you would back down on that one
Took me a long time to get clear details of the operation of the centre diff. When I have one dismantled I will post photo's if I can show the workings clearly. Don't hold your breath, it will be a while yet, just finished digging the service pit to drop the box and fit my spare
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Blimey Tony, I never thought you would back down on that one
Had to really Keith, the drawings in RAVE are not too clear. Workshop manuals are not what they used to be by a long chalk. But will wait for your clear photos before i whip myself with a rusty chain. But looking at things in a rather more sober fashion so to speak, what you and the other lads say makes perfect sense. So i will get a chain to hand ready for the day of judgement.
Datatek
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Had to really Keith, the drawings in RAVE are not too clear. Workshop manuals are not what they used to be by a long chalk. But will wait for your clear photos before i whip myself with a rusty chain. But looking at things in a rather more sober fashion so to speak, what you and the other lads say makes perfect sense. So i will get a chain to hand ready for the day of judgement.
Only know so much beacause of my transmission problems, RAVE has a lot of errors and vague information, as you say W/S manuals are not what they used to be. Takes a big man to admit an error
jamesmartin
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ive got some laid on a bench if you want some pics
Datatek
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If it makes the operation clearer, yes please as it will put an end to the arguments
Particularly the concentric shafts where the VCU fits
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Only know so much beacause of my transmission problems, RAVE has a lot of errors and vague information, as you say W/S manuals are not what they used to be. Takes a big man to admit an error
I am a fairly big bloke. J the range would probably say fat bastid. Always best to put your hand up unless it's something your telling the wife that is.
Datatek
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I am a fairly big bloke. J the range would probably say fat bastid. Always best to put your hand up unless it's something your telling the wife that is.
As opposed to putting the hand up the wife
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