Thread: D4 brakes to a D3??

I had D3/4 2.7 brakes on my D4 so I could run 17" wheels. When I swapped back to the D4 brakes I didn't notice much of an improvement. I think the biggest difference is resistance to fade rather than vastly improved performance.
With the upgrade you are looking at you only get a small increase in swept area. If you really want to do it I'm guessing it would be cheaper to buy the discs here and just get some front calipers with carriers and rear carriers from a wrecked D4 here in Australia and then you would get the larger D4 3.0/V8 caliper.
The lock screw and wear sensors are common to all D3s and D4s.

I don't think the brakes are too bad they do need a fair bit of pressure on the brake pedal to get working but they pulled my 3T V8 up effectively. Legally I can't see a problem with upgrading brakes from the same model (L319) but you should check with your local road authority to confirm this.

Originally Posted by PeterOZ

folks,
have been reading on some other forums in the UK where there is a vendor offering complete "V8" brake upgrade kits for th D3, what this essentially does is to replace the D3 rotors & pads for D4 rotors and brake pads but you keep the original D3 caliper.

These are offered as complete kits, rotors, pads, followers, hub lock screw and wear sensors. Caveat is that you must have the stock 18" rims, which mine does of course.

Firstly has anybody gone down this road and what is the feedback?

Secondly are there any impacts to ADR, compliance, insurances and those with the funnly flashing blue lights

D3 brakes are not the best so if they can be upgraded then happy days, was going to say they are rubbish but then somebody with an axe to grind would jump in here bleating!
thanks in advance

cheers
Peter

I found the brakes on my fathers D3 pretty good. Enough to inspire confidence they would stop at least.

I now have the D4 2.7 and find the brakes very effective but can’t recall the variance of the D3. I know it was ok with our Cat on the back of it.

What pads and rotors are you currently running? The DBA T2 slotted And Akebono pads has always been a reassuringly good combo.

If you do make the change it is a figment of later model gear so I can’t see any legal issues.

I chucked the Delphi kit from Rimmer Bros on my D3 TDV6 a month or so ago. I reckon there’s a noticeable — but not massive — improvement in stopping power.

I reckon replacing the front and rear brakes — keeping the rears stock — cost me around the $800 mark, buying the bits from the UK. Im happy with that — a dam sight cheaper than taking it anywhere locally for the work to be done.

I’ve got no idea what the legalities are from a technical point of view, but these were standard equipment on the 4.4 V8 D3s which have the same chassis and drivetrain as my TDV6. It’s not like you’re trying to bolt on Carolla brakes to a D3; it seems quite appropriate to me.

Cheers,

— Andrew

Originally Posted by PeterOZ

folks,
have been reading on some other forums in the UK where there is a vendor offering complete "V8" brake upgrade kits for the D3

I suspect D3 V8 brakes, not D4 3.0 brakes. D3 V8 brakes allow a minimum of 18" rims front and rear.
I can add my experience going from D4 3.0 front and rear brakes to D3/D4 2.7 front and rear brakes that the new 2.7 brakes were much more aggressive than the 30K barely used 3.0 brakes and for the next 200K or so until the vehicle was sold that I never felt the 2.7 brakes lacked any stopping power with my driving and braking habits.

D3 V8 calipers front and rear are the same as the 2.7, just larger dia discs both ends and carriers to (that) mount the calipers further out. D3 V8 rear brakes are the same as 3.0 D4 rear brakes excepting for MY10-11 which were originally fitted with larger alloy calipers.

Originally Posted by Graeme

D3 V8 callipers front and rear are the same as the 2.7, just larger dia discs both ends and carriers to mount the callipers further out. D3 V8 rear brakes are the same as 3.0 D4 rear brakes excepting for MY10-11 which were originally fitted with larger alloy callipers.

Hi Graeme, just to clarify, do the D3/4 calipers all run a seperate carrier between the calipers and the axle mount?

G'day Slunnie,

Yes, the calipers all float in removable brackets.

Ah ok, the sliders bracket like pictured.

I was thinking you meant a bracket between the slider bracket and the axle.

Sorry, I should have written carriers.

The 3.0 D4 front brakes can be fitted to a D3 with appropriate carriers but the larger 3.0 dust shields would also be required.