Audi TT spindle conversion to mk4 VW TDI

24 Mar 2015 | Author: | Comments Off on Audi TT spindle conversion to mk4 VW TDI

Converting to the Audi TT/VW R32 spindle and/or lower arms

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The Audi TT/VW used sportier pieces than the Jetta/Golf/New (A4) TDI. This how to convert to the Audi TT suspension.

In my if you just want big brakes for TDI, stay with the spindle. Remember, it’s not to use the TT/R32 spindle to use the TT/R32 . the brakes will bolt the 1.8T/VR6 spindle but not your TDI There are two levels of conversion: and ball joint alone OR lower control arm (LCA), sway bar, and ball

Below is a picture of a TT spindle vs. the spindle.

The biggest advantage of the more complex TT/R32 is adjustable camber on the TT lower arm (LCA). You could use a camber or a LCA mod kit if you just need adjustable The Audi TT LCA has larger and stiffer and rear suspension bushings will improve handling. large bushing will fit in all mk3/mk4 LCA).

Using the TT spindle alone not give you adjustable camber, you to convert to the TT LCA because that’s camber is adjusted from. other differences: TT/R32 LCA are metal vs. the stamped steel of the The solid part is stronger but also heavier (about 5 lbs each). Pictured below is an TT LCA and a closeup with measurements the elongated holes for adjustable

Also note the nub on the LCA. You may this nub for the sway bar links, don’t have the nub. heard that 2001 arms have this nub but have said they

The problem is that non-nub have the same part as arms with the nub. on this below.

Below is the TDI A4 body control arm looks It’s stamped steel and the bushing has spaces vs. the solid above to allow more

Dimensions of the Audi TT LCA, the elongated holes for adjustable

8N0 407 151D – Left TT/VW golf R32 (mk4) lower arm

8N0 407 152D – Right TT/VW golf R32 (mk4) control arm

8N0 407 255E or 8N0.407.255B Left Spindle

8N0 407 256B Right Spindle


estimated dealership price: for the R32 for $287 each. $574 taxes.

Impex has the parts above) for $230 and $246 = w/o shipping.

Also note there are 2 versions of the Audi TT pictured below. The early has smaller bushings and is only used, the new style has larger (bushings are direct fit into all mk3 and mk4 Also make sure LCA has the nubs for drilling a spot to the sway bar endlinks (more below)

Detailed procedure

Summary here

The parts above has a few combinations that you can read this page and figure out what you need. two choices are: spindle/ball conversion OR spindle/ball joint/LCA/sway bar To use the TT/R32 spindle, modify the TT joints yourself to fit the existing TDI control arms, the rest is bolt on.

You also have to the tie rod ends upside down. You do not get camber. To use the TT/R32 spindle/ball sway bar, you have to the lower control arms to the TDI sway bar end links, the rest is on. You do get adjustable camber.

Original threads can be viewed,,, I’ve basically summarized and all the most important info many forum posts on page. Procedure and pics by and Tyrolkid except where

Also note that the TT had two versions of the LCA, there was a to make the TT more stable and it more understeer. The specific consisted of new front lower arms with larger, offset front bushings, as as modified front and rear with stiffer compression and rebound dampening to reduce transfer from rear to when braking.

The front bar was increased in size from to 20 mm, while the rear was reduced 1mm in from 15mm to 14mm. The in handling was slower steering increased understeer, and reduced oversteer.

To use the Audi spindle/ball joint

Other than turning the tie rod end down to fit the spindle, the only modification you need is to grind/drill the TT ball joint to fit the A4’s It’s not possible to drill out the LCA for camber because it’s steel and doing so would it. The Audi TT LCA is cast so it can withstand the holes for adjustable camber.

The also has a better camber

Below is the TT spindle with an A4 Note that the LCA is stamped

To use the Audi TT spindle/ball joint/LCA/front bar conversion

The biggest obstacle is a place to mount your sway bar end links if you choose to the stock front swaybar. Audi TT/R32 LCA have the nub for out a spot to mount your sway bar end links, some do If you do not want to keep the stock swaybar or your TT/R32 LCA do not the nubs. you have to get a TT front TT front swaybar endlinks, and new TT

The 1.8T/VR6 sway bar goes the axle, the TT/R32 swaybar is likely to have no clearance since it goes under the

Remember, if your LCA does not the nub, you must get TT/R32 to connect the swaybar endlinks. If it you can drill the LCA out and reuse the stock endlinks. This is pictured and in a picture above.

Also that there are several bearings for the Audi TT spindle. The have different part and cars that came an 18 inch wheel package the factory will have the bearing for the 20ths. If getting TT your best bet is to find R32 if you don’t want to replace bearings or modify the axle from the 1.8T/VR6 spindle.

is a modified Audi TT LCA with out hole. Note the nub which the endlink is bolted to.

Procedure and below from Richard55 at

Put the LCA in a vice as we are going to drill it out to pitch. Center punch the LCA in the of the knub.

Before you drill figure out how you need to go by installing the bolt the old LCA with the sway bar bracket in Then use tape to mark the You will need to go a bit deeper to get it to fit If you don’t go deep enough the will not bottom out on the bracket and it be loose, but don’t worry too you can always trim the bolt to fit.

I had to lol.

Start keeping it straight and work way up to the tapping bit size.

Again the depth you need to go on the tapping Go for it, just keep it straight and not side to side.

Tap the hole, the LCA on the car and install the sway bar. Audi TT LCA now works with the NB bar.

If you have any questions swapping TT ball joints or control arms, feel to ask at the VW TDI discussion forums

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