02B PJA Transmission

[Ace]

Anybody know anything about these transmissions?
Which is what's being used on the 6sp b8.5 2.0t and probably A4.

What could they be swapped with the easiest for higher performance tuning?

Thx

[hahnmgh63]

I think you mean a 0B2 manual 6 speed. The PJA is interchangeable with the NSN & NSP transmission. Also could interchange with the PJE & PNH Europe only (I think) TDI transmisisons which may be the same but in some instances the TDI tranny's have an increased Torque capacity. Many have modified A5/A4's putting out 300+bhp using the OEM transmisison. Just use a top quality Synthetic in the gearbox and diffs.

[Ace]

I think you mean a 0B2 manual 6 speed. The PJA is interchangeable with the NSN & NSP transmission. Also could interchange with the PJE & PNH Europe only (I think) TDI transmisisons which may be the same but in some instances the TDI tranny's have an increased Torque capacity. Many have modified A5/A4's putting out 300+bhp using the OEM transmisison. Just use a top quality Synthetic in the gearbox and diffs.

Correct, I mistyped.
I am around 600chp and 650ishNm right now.
But i expect this to break eventually specially since I have room left to to push it further.

But as far as I have found nobody makes any solutions to build these.
So seeing what's out there that it can be swapped with.
And what all needs to be changed. Since I assume the diff will not necessarily be compatible.

[Smac770]

The type 0B2 is for quattro with engines to 400 Nm. Beyond that, you'd use a type 0B4, such as in the S4/S5.

Your type 0B2 code PJA uses a 38:11 final drive with a 31:29 intermediate drive for the front, and is paired with a type 0BC code MFS, later QLC, rear diff (48:13).

38:11*31:29 = 3.6928
48:13 = 3.6923

Natural progression would be to drop the type 0B2 for a type 0B4 code xxx that uses a 29:8 final drive. This is normally matched with a type 0BC code MFT, later QLD, rear diff (48:13). The difference from the codes used with 0B2 is these use 75.5mm flange shafts instead of 70.7mm flange shafts. Maybe you'd prefer the much shorter gearing of the ones used in the S4/S5 3.0T than that use with the 3.0 TDI.

So just swap out the whole 0B4/0BC pair from an S4/S5. Probably swap the axles too while you're there. B8 parts set has three tiers of axle "beefiness".

[Ace]

The type 0B2 is for quattro with engines to 400 Nm. Beyond that, you'd use a type 0B4, such as in the S4/S5.

Your type 0B2 code PJA uses a 38:11 final drive with a 31:29 intermediate drive for the front, and is paired with a type 0BC code MFS, later QLC, rear diff (48:13).

38:11*31:29 = 3.6928
48:13 = 3.6923

Natural progression would be to drop the type 0B2 for a type 0B4 code xxx that uses a 29:8 final drive. This is normally matched with a type 0BC code MFT, later QLD, rear diff (48:13). The difference from the codes used with 0B2 is these use 75.5mm flange shafts instead of 70.7mm flange shafts. Maybe you'd prefer the much shorter gearing of the ones used in the S4/S5 3.0T than that use with the 3.0 TDI.

So just swap out the whole 0B4/0BC pair from an S4/S5. Probably swap the axles too while you're there. B8 parts set has three tiers of axle "beefiness".

Ok. So I should be looking out for a S4/5 gearbox or 3.0TDI and just the rear dif from those with axles.
Front dir can stay as is?

[Smac770]

You have an 0B2, you want more power handling, that's what the 0B4 is for. There are 0B4 with the same final drive ratio as your 0B2 (therefore, matching the rear diff you have now), but they have gear ratios for a 3.0 TDI. You might prefer instead to so with the 0B4 from a 3.0T vehicle (S4/S5 here), but you'll also want the matching rear diff, which means larger rear axles and probably also larger front axles, as the S4 3.0T would normally have over an A4 2.0T.

The front diff is integrated into the transmission.


https://www.ilcats.ru/audi/?function...=5&language=en

There's the B8.5 A5CO rear axle diagrams. 4-cyl rear diff, 6-cyl rear diff, 4-cyl rear axles, 6-cyl rear axles.

G0L = 6MT quattro
TC6 = 3.0T
TG6 = Gen2 2.0T
TW6 = Gen3 2.0T

https://www.ilcats.ru/audi/?function...22&language=en
Note the diff codes that are 70.7mm vs 75.5mm. If you work it out, it probably aligns with the codes for 4-cyl 0BC applications vs for 6-cyl 0BC applications


https://www.ilcats.ru/audi/?function...=3&language=en

second and third panels are your 0B2 and 0B4 transmissions
If you go down to the input/output shafts panels, you can see the actual gear ratios


https://www.ilcats.ru/audi/?function...=4&language=en

front axles and front diff internals on that page