Quaife ATD rear diff + WRX = New car
27 September 2003, 10:01 PM
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Before two months I ordered for a friend with MY02 WRX a rear Quaife ATD diff but he hasn't fitted it until yesterday as he was very busy all this time. Well, today I drove his car and all I can say is that except it has also front-rear Whiteline anti roll bars his car is an eye opener. Better reaction than a STI rear diff, smoother and direct torque transfer, no noises or malfunctions, direct bolt on unit and most important...CHEAP
I am going to add the diff in my "to do" list first priority!
You wouldn't believe how a torsen rear diff transforms the car!
JIM
And I am not a Quaife distributor...
I am going to add the diff in my "to do" list first priority!
You wouldn't believe how a torsen rear diff transforms the car!
JIM
And I am not a Quaife distributor...
28 September 2003, 09:18 PM
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I mean cheap when you compare it with the factory rear differential and most importantly when you compare it with what each modification gives you per euro/pound.
Suspension/handling and brakes should be first in mod priority IMO not engine, programms, exhausts etc
JIM
Suspension/handling and brakes should be first in mod priority IMO not engine, programms, exhausts etc
JIM
30 September 2003, 01:23 PM
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Jim, do you know how different they work? What BHP figure can they handle? I'd like to know what the std WRx rear will take before it falls apart...looking at topics...seems gearbox goes first. My clutch now slips (I've not got the cash to change it yet) so I'm hoping it will (along with gearbox) hold together for a while.
30 September 2003, 04:37 PM
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I don't think it has BHP limits as the same unit used on Rallies with full lifetime warranty.
Actually even the factory differential has internal plates and springs and seems also quite reliable, the problem is that it needs spins before it acts while the ATB Quaife senses torque and distributes the power proportionately.
At least here in Greece we didn't have cases with failed rear differential except one where the guy destroyed both gearbox-centre-rear differentials probably due to frequently used handbrake but this is another story!
I am going to buy one for rear if Subaru dealer accept it, otherwise I know a friendly dealer that can install it without warranty problems!
If you have the money go for it you will not regret it, believe me!
JIM
Actually even the factory differential has internal plates and springs and seems also quite reliable, the problem is that it needs spins before it acts while the ATB Quaife senses torque and distributes the power proportionately.
At least here in Greece we didn't have cases with failed rear differential except one where the guy destroyed both gearbox-centre-rear differentials probably due to frequently used handbrake but this is another story!
I am going to buy one for rear if Subaru dealer accept it, otherwise I know a friendly dealer that can install it without warranty problems!
If you have the money go for it you will not regret it, believe me!
JIM
04 October 2003, 09:46 AM
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Jim
been wanting to do this for years, but may now need your help.
rumour has it the new shape wrx uses an r180 rear diff.
Can you compare the diff casing or the diff itself to that of one from a classic and tell me if it is larger?
Did he have to select a quaife specific to the new type of car in order for it to fit?
Basically I am after a quaife to replace the plated R180 i the rear of my car.
been wanting to do this for years, but may now need your help.
rumour has it the new shape wrx uses an r180 rear diff.
Can you compare the diff casing or the diff itself to that of one from a classic and tell me if it is larger?
Did he have to select a quaife specific to the new type of car in order for it to fit?
Basically I am after a quaife to replace the plated R180 i the rear of my car.
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04 October 2003, 05:31 PM
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Hi Adam
I am not sure which one is in the new WRX (I have never measured) but Quaife supports specific ATB diff for each model, the 02 model needs in some cases slight modifications to fit but they have now direct bolt on rear diffs for each model year, you only need two rear bearings!
Even Subaru mechanic told me that fitment was perfect as the original unit (and they don't suggest aftermarket parts nor they advertise them as he did), he finhshed the job in 80-90 min!
Today I installed a Whiteline adjustable antiroll bar rear with max camber front and some toe out rear(1mm per wheel) and surprised from the difference in handling, imagine how it drives with the Quaife rear ATB diff and the above!
In my country that is famous for the perfect "mirroring" roads without potholes
it's better to stay with factory suspension that has enough travel and get all the benefits from better rear diffs and anti roll bars, I suppose that this can be true even in UK when you use your car on imperfect roads and don't want to loose your comfort.
Except of course you do track days...or you prefer a car that tends to understeer in the edge.
Cheers
JIM
I am not sure which one is in the new WRX (I have never measured) but Quaife supports specific ATB diff for each model, the 02 model needs in some cases slight modifications to fit but they have now direct bolt on rear diffs for each model year, you only need two rear bearings!
Even Subaru mechanic told me that fitment was perfect as the original unit (and they don't suggest aftermarket parts nor they advertise them as he did), he finhshed the job in 80-90 min!
Today I installed a Whiteline adjustable antiroll bar rear with max camber front and some toe out rear(1mm per wheel) and surprised from the difference in handling, imagine how it drives with the Quaife rear ATB diff and the above!
In my country that is famous for the perfect "mirroring" roads without potholes
it's better to stay with factory suspension that has enough travel and get all the benefits from better rear diffs and anti roll bars, I suppose that this can be true even in UK when you use your car on imperfect roads and don't want to loose your comfort.Except of course you do track days...or you prefer a car that tends to understeer in the edge.
Cheers
JIM
14 October 2003, 12:21 PM
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Hmm, diff sounds really good. Think I'd have to change clutch, then gearbox first as she's not taking the torque of my SR40, but I'll be up for changing the rear diff when money allows.
Do you know of a decent gearbox/front diff for 02 model also?
Do you know of a decent gearbox/front diff for 02 model also?
14 October 2003, 04:51 PM
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I have front Quaife installed. Im happy with it but plate type will be better for me, because ATB operate only in power load not during braking.
Plate diff is little bit dificult to drive it.
My recomendation: front ATB differential, rear mechanical type like in Type R, or plate type.
Plate diff is little bit dificult to drive it.
My recomendation: front ATB differential, rear mechanical type like in Type R, or plate type.
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