[MRyan]

Afternoon all!

My clutch has started slipping in higher gears in the GT, at 118k its done alright for itself. So I've begun looking into quotes for the job, and not too soon as she's booked in for a remap this Friday :thumbup:

My question is, I seem to recall reading on here that the clutch from the 170hp JTD GT's are a bit tougher and will fit in place of my clutch - does anyone know if this is true?

Many thanks for any information!

 

[VO2Max]

Yes it's true, I believe the difference is merely some dimples on the surface of the friction plates which give more 'bite' to cope with the extra torque of the 170.

 

[MRyan]

That's what I'd heard, there is a local Alfa specialist who I've sent an email to for a price and asked for the 'uprated' clutch so we shall see if they'll do it, or if they have any knowledge with it.

 

[[email protected]]

GT JTD Clutch

Afternoon all!

My clutch has started slipping in higher gears in the GT, at 118k its done alright for itself. So I've begun looking into quotes for the job, and not too soon as she's booked in for a remap this Friday :thumbup:

My question is, I seem to recall reading on here that the clutch from the 170hp JTD GT's are a bit tougher and will fit in place of my clutch - does anyone know if this is true?

Many thanks for any information!

Hi,

I believe the 170bhp clutch is 12% uprated from standard.

Philip

 

[VO2Max]

12% of what? Torque capability?

 

[MRyan]

The chap from the local specialist is happy to do the job, but has recommended I stay with the stock clutch as the uprated one will lead to a heavier pedal? My pedals already heavy so I'm sure it'll be fine :biglaugh:

 

[_The_Editor_]

The chap from the local specialist is happy to do the job, but has recommended I stay with the stock clutch as the uprated one will lead to a heavier pedal? My pedals already heavy so I'm sure it'll be fine :biglaugh:

Heavy pedal with uprated clutches is usually down to a stronger pressure plate giving more clamping force, with the 170 clutch pack I believe it's only the friction plate that's different (dimples = less surface area, same force spread over smaller area = higher clamping pressure) so pedal feel should be unchanged...

For the heavy pedal, get your guy to remove and clean the actuator fork bushes.. The bottom one gets gunky and binds up often giving a not so great pedal feel... Even better get a new set fitted with a smear of oil/grease to keep em slick.. I'd probably just stick a new slave cylinder on at the same time for the sake of a £50 part and one circlip's worth of labour it can prevent a headache later on!

 

[[email protected]]

12% of what? Torque capability?

12% more clamping pressure.
It is the clutch cover that is different.

 

[mikseymono]

Heavy pedal with uprated clutches is usually down to a stronger pressure plate giving more clamping force, with the 170 clutch pack I believe it's only the friction plate that's different (dimples = less surface area, same force spread over smaller area = higher clamping pressure) so pedal feel should be unchanged...

For the heavy pedal, get your guy to remove and clean the actuator fork bushes.. The bottom one gets gunky and binds up often giving a not so great pedal feel... Even better get a new set fitted with a smear of oil/grease to keep em slick.. I'd probably just stick a new slave cylinder on at the same time for the sake of a £50 part and one circlip's worth of labour it can prevent a headache later on!

Will you be going for a new Dual Mass Flywheel as well? I am in a similar boat, though the Swedish variety.....all in been quoted £1200......I've done 105k, want to keep my lump, just trying to save up the pennies....

Have fun with the map!

M

 

[_The_Editor_]

Will you be going for a new Dual Mass Flywheel as well? I am in a similar boat, though the Swedish variety.....all in been quoted £1200......I've done 105k, want to keep my lump, just trying to save up the pennies....

Have fun with the map!

M

I'm not the one with the clutch replacement on the table yet!

If/when it's my turn, I will almost certainly keep the DMF. Everything I've read from other users suggests to me that it wouldn't be the right thing for the way I want to drive and use my car...

Although the cost of them is enough to make the eyes water!

 

[ALFADOIT]

Right the answer here is simply what state of tune do you desire from your Gt JTD? The std 170 clutch will be fine for a std car or a gentle stage one map. Any more you need to be considering different options.

My modified GT 170 with hybrid has just gone through a stage one clutch in 5k miles. Heart breaking expensive stuff!!aranoid:

There are compromises in making things stronger. Fixed SMF with stage one clutch, fixed smf with stage 2 clutch. Or DMF with stage 2 clutch. And map the car appropriately calming things down around the 3k point to relieve pressure on the clutch.
I drove a fixed smf car with stage 2 and it was difficult in traffic to say the least. I have had a bespoke stage 2 clutch made and will use a new DMF, for me this is the best option for comfort and the performance i need going to the next level.

Damien.

 

[mikseymono]

I'm not the one with the clutch replacement on the table yet!

If/when it's my turn, I will almost certainly keep the DMF. Everything I've read from other users suggests to me that it wouldn't be the right thing for the way I want to drive and use my car...

Although the cost of them is enough to make the eyes water!

yes , sorry The Editor, must have pressed the quote button by mistake....meant it for the OP. So you would change just the clutch only and not the DMF and Slave at the same time?

M

 

[Paul_Tim]

yes , sorry The Editor, must have pressed the quote button by mistake....meant it for the OP. So you would change just the clutch only and not the DMF and Slave at the same time?

M

I recently had the clutch and flywheel replaced on my 06 JTD GT, Looking at the old clutch there were obvious wear grooves where the release bearing presses on the clutch fingers and it's these grooves, I was informed, that can make the clutch operation heavy as it starts to wear (probably caused by previous owners riding the clutch rather than bothering to use the handbrake). After replacement of everything, slave cylinder failed, clutch is now really light so I have some doubts that the uprated clutch would be significantly heavier than standard.

 

[MRyan]

Right the answer here is simply what state of tune do you desire from your Gt JTD? The std 170 clutch will be fine for a std car or a gentle stage one map. Any more you need to be considering different options.

My modified GT 170 with hybrid has just gone through a stage one clutch in 5k miles. Heart breaking expensive stuff!!aranoid:

There are compromises in making things stronger. Fixed SMF with stage one clutch, fixed smf with stage 2 clutch. Or DMF with stage 2 clutch. And map the car appropriately calming things down around the 3k point to relieve pressure on the clutch.
I drove a fixed smf car with stage 2 and it was difficult in traffic to say the least. I have had a bespoke stage 2 clutch made and will use a new DMF, for me this is the best option for comfort and the performance i need going to the next level.

Damien.

Morning Damien, first things first - love your GT while we're on the subject! Secondly, with mine I wont be chasing any large power figures really - I'm hoping to perk things up and aim for the 180-190hp area with her. What sort of power are you currently putting out? I'm hoping a fresh DMF and the 170hp clutch will see me through for a couple of years at least. That being said, its replacing the now sold BMW on the annual Nurburgring trip this summer which will shorten the life of things I imagine!

I'm also getting some good quality gearbox oil put into the box while its out, as I've heard they're not the strongest unfortunately

 

[VO2Max]

The gearbox in a GT 1.9JTD is fine, the weakpoint is the diff, which many owners alleviate by fitting a (much stronger) Q2 or Quaife diff. This gearbox is effectively the same as in the GTA I believe (different ratios, obviously).

(The gearbox used in the 159 with the 1.9JTD is a different story entirely, the M32(?) gearbox is used there, and it's rubbish by comparison).

Always a good idea to have good oil in it though of course, a good fully synthetic :thumbs:.

 

[MRyan]

Oh really, so not the M32 in mine? That's a relief if so, it whines ever so slightly when cold which was worrying me.

I've had my first quote back, £910 to change the lot! Quite steep I thought, bearing in mind I can get a genuine Valeo clutch & DMF kit off of eBay for £280 posted. Is the job a particularly horrible one?

 

[ALFADOIT]

Morning Damien, first things first - love your GT while we're on the subject! Secondly, with mine I wont be chasing any large power figures really - I'm hoping to perk things up and aim for the 180-190hp area with her. What sort of power are you currently putting out? I'm hoping a fresh DMF and the 170hp clutch will see me through for a couple of years at least. That being said, its replacing the now sold BMW on the annual Nurburgring trip this summer which will shorten the life of things I imagine!

I'm also getting some good quality gearbox oil put into the box while its out, as I've heard they're not the strongest unfortunately

Hi Ryan

Thanks for your kind words on my GT. I have studied this subject deeply. With the power you desire to be at you would be fine with a stage 1 item. The 170 item would be ok, but would not last as long as a stage one unit. A lot depends on the mapping, the mapping needs to be steady around the 3k mark where the torque peaks.

Damien.

 

[MRyan]

We shall see, it gets mapped on Friday! I'm still wincing at the cost of the DMF, if it wasn't required the clutch job would be a lot cheaper. There is a chap selling a Valeo kit with the clutch plate and DMF for £280 posted on eBay which seems suspiciously cheap, but he does label it as genuine and has 100% feedback so I'm tempted to go for it.

 

[ALFADOIT]

We shall see, it gets mapped on Friday! I'm still wincing at the cost of the DMF, if it wasn't required the clutch job would be a lot cheaper. There is a chap selling a Valeo kit with the clutch plate and DMF for £280 posted on eBay which seems suspiciously cheap, but he does label it as genuine and has 100% feedback so I'm tempted to go for it.

Ryan my DMF will be coming out and on last inspection 5k miles ago is was absolutely fine on my 40k mile car. You can have that for a bargain price if that helps? I am fitting a brand new unit as preventative medicine, my car is having to take some serious torque soon. I would also wager my stage 1 clutch would be fine at your desired torque level.

Damien.

 

[MRyan]

Thanks very much for the offer but I sourced a kit this afternoon already! Are you heading down the SMF route with yours?