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It exerts pressure on the planet gears in the diff causing them to bind, nothing very clever You can get a similar effect by just building a "Tight" Diff, shimming the planet gears to mesh very tightly together. Or as we used to do, use a shimming material that expands more with heat that way you can pass scrutineering with an "Open Diff" but after a few laps the diff starts to tighten up ;D Does it not just knacker the planet gears then, or the bearings that they spin on? Surely those bearings are not designed to take big side loads. This is my big problem with it, the website is very cleverly worded to say that they have never had a failure of their components....... Neglects to say what the increased wear is on the dff that it it fitted to though, which leads me to suspect it is an issue you don't word something that carefully without very good reason ;D. When we were running the "tricky" diffs, the material used to shim the planet gears was sacrificial and soft, so it didnt harm the standard diff. but it did need to be set up and reshimmed for each race.... The time involved in doing that was worth it in laptimes ;D On a road car then it would not last long and revert to an open diff, but this is a safe failure of the slip limiting device. Any harder material that does the same job or forcing planet gears to rub on the dif casing is going to accelerate wear of those components. Most forms of LSD require maintainance to keep working properly, the quaife type needs less than most, Torsen is fit and forget but the fluid and hence performance degrades over time. plate types wear clutch plates, balls and ramps, Oils need changing regularly as they get a very hard time. How many people actually service a Diff except when they have a problem with one ;D Be prepared for more work with it whatever kind of slip limiting device you use.... Personally I would run a welded diff over a Phantomgrip and live with the quirky traits ;D Having a load of extra metal and springs in there side loading planet gears is not a very nice engineering solution IMHO HTH Dom
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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LSDNathan
@bgtmidget7476
Club Retro Rides Member 1
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Only issue is my Transmission then I guess with it having 250K plus miles on it without a rebuild. I think best option is the Welded diff and a New Type 9 Box
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If you can afford it, I would go for a proper LSD, but failing that if you need the additional traction then a Locked diff can work well. A spool is the best locked solution as it removes all the gears, but failing that a Hefty Arc welder makes a pretty big mess in there ;D An update on the Quaife unit. It is for an LDV400 series, which is a Salisbury axle and apparently different to the salisbury axle used in the Landrover etc, so unlikely to fit your B So it looks like it will be cleaned up and put back on ebay ;D Will be Ideal for anyone doing MX or having an LDV based Camper/ Race transport ;D Cheers Dom
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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LSDNathan
@bgtmidget7476
Club Retro Rides Member 1
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Right then Time to find an exploded view of me diff to find out where the Planet Gears are to Weld
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Right then Time to find an exploded view of me diff to find out where the Planet Gears are to Weld You want it to look like this: Thats a Mini Dif but they all work the same way
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Last Edit: Nov 2, 2005 11:30:47 GMT by CR500Dom
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You want it to look like this: Sh1t a brick! That bad boy is going nowhere!!!!
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT!
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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LSDNathan
@bgtmidget7476
Club Retro Rides Member 1
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WOW I thought it was a Presicion thing to do but just guess I Open her up Point and Shoot lol,
The only other thing i see from that image is the 2 outer Cogs/Things look Welded too do these not have to be free? Well I would of thought so
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WOW I thought it was a Presicion thing to do but just guess I Open her up Point and Shoot lol, The only other thing i see from that image is the 2 outer Cogs/Things look Welded too do these not have to be free? Well I would of thought so No ;D Farmyard/stock car solutions ltd And before you ask is not one of mine I just found the photo on ebay The whole diff you see there rotates on bearings that locate on the 2 machined shoulders, it has the CROWNwheel attached to it, the differential action is taken up by the planet gears "Rotating inside the rotating assembly" IYSWIM ? Weld up the planet gears and you have no differential action, therefore locked diff ;D Does that make it any clearer
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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LSDNathan
@bgtmidget7476
Club Retro Rides Member 1
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Yup certainly does now thats for sure, Right goning to crack the Welder out now,
Cheers for that matey,
I Owe you a drink
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Yup certainly does now thats for sure, Right goning to crack the Welder out now, Cheers for that matey, I Owe you a drink We want pics remember ;D
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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LSDNathan
@bgtmidget7476
Club Retro Rides Member 1
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don't Worry you will be getting some, Well the backs up and Prop is off but then it started to rain
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racer86
Posted a lot
'72 BMW 2002 / '72 Alpine A110 Gordini
Posts: 2,184
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I'm looking forward to this! I have been tempted by the way of the mig spec diff (i have a spare) but its sideways everywere in the wet anyway, could be fun but I'm on my 3rd set of wheels after a number of backwards off the road excursions with my open diff!. Keep us posted Mate.
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I can see the benefits of having an LSD as it enables normal diff action most of the time but with the benefit of being able to effectively 'lock-out' the diff should one wheel loose traction & transmitting drive to the wheel that does. I would be dubious of welding up a diff, as in the normal everyday situation - perhaps making 'progress' down a dry backroad the permenantly locked diff will cause the wheels to 'scrub' as you go round corners causing reduced or complete loss of traction. However it would make sense if you were intending to either drift or drag the car on the understanding that its on-road manners would be compromised
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Last Edit: Nov 2, 2005 17:27:56 GMT by DerbyDan
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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LSDNathan
@bgtmidget7476
Club Retro Rides Member 1
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Yer thats the thing you see, the car is not used very often at all really, and when it is she is usually used on Airstips and the like so the Compromise is ok really. Plus changing a Diff in one of these is so quick, and they are in plentyful supply, and cheap too, its the choice of tyres though as these were not that cheap but hey, drift about a bit get bored put me spare diff in and normal tyres/wheel on
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