nelsonian101 Donating Members 961 Member For: 16y 8m 13d Gender: Male Location: Sydney Posted 03/12/13 08:54 PM Share Posted 03/12/13 08:54 PM I had a Harrop Truetrac installed in my FGXR6T late last year.Regular diff oil changes with top shelf synthetic oil since then.With the car jacked up at the back when I spin one rear wheel (I think it was LHSide?), the opposite wheel (RHS) rotates in the opposite directionWhich is what I understand is normal for a LSD diff.However, when I spin the other wheel on the RHS, the original wheel (LHS from memory) remains stationary.Shouldn't the original wheel spin in the opposite direction too?The car is very rarely launched hard from standstill. Never drag raced. Maybe 5 circuit days though since the diff installation but I am not overly hard on the driveline.Central Automatic Transmissions did the rebuild and I recommend their work.Is this normal behaviour for a mechanical LSD and did the synthetic oil have anything to do with it?I know Harrop prefer mineral but didn't seem up to the spec for my circuit temp requirements so I was recommended synthetic.Mainlube have seen many Truetracs with no problems so far too.I am disappointed if it is broken as I was under the impression due to their sales spiel that this diff was very strong and would outlast the car.I remember driving the car late last year and could feel the tyres chirping from one side to the other during 1st gear drives from the traffic lights, but it feels to be spinning the LHS wheel now. Just seat of the pants feel but I maybe wrong. Link to comment Share on other sites More sharing options...
nelsonian101 Donating Members 961 Member For: 16y 8m 13d Gender: Male Location: Sydney Posted 03/12/13 09:59 PM Author Share Posted 03/12/13 09:59 PM Quick update.Just spoke to a diff guy and he re-assured me that this is normal for a Truetrac.This type of Truetrac will only work when power is applied to the drivetrain and will act differently at standstill to the stock diff. Link to comment Share on other sites More sharing options...
unclewal Donating Members 583 Member For: 14y 5m 18d Posted 03/12/13 10:44 PM Share Posted 03/12/13 10:44 PM Mate mine does the exact same thing, if you apply the brake on the opposite side it will lock they will both spin in the same direction. Link to comment Share on other sites More sharing options...
nelsonian101 Donating Members 961 Member For: 16y 8m 13d Gender: Male Location: Sydney Posted 03/12/13 11:11 PM Author Share Posted 03/12/13 11:11 PM Thanks. Good to have piece of mind now Went into panic mode as I have a hill climb at Marulan next weekend and I need the Truetrac performing bigtime.Track is a ridiculously tight 2nd geat reverse layout including skidpan and possible handbrake turns! Link to comment Share on other sites More sharing options...
unclewal Donating Members 583 Member For: 14y 5m 18d Posted 04/12/13 01:25 AM Share Posted 04/12/13 01:25 AM Video or ban Link to comment Share on other sites More sharing options...
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