SMac770

Transmission codes represent a specific transmission type for a specific vehicle application. Any number of variables are represented by the code, such as the final drive ratio, the gearbox ratios, the flange shaft size, for an automatic, the mechatronics programming.

For a C7.0 A6 CGLC (EA189 2.0 TDI) with NSL (type 0AW, FWD), it looks like the NDH, NSL, and PCF were used. But while the workshop manual refers to NDH, the parts catalog page refers only to NSL and PCF.

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

From the 0AW workshop manual for the C7, we see the following in the allocation table:
NDH - for 2.0 TDI?
NDL - for 132kW 2.0T FSI
NDM - for 155kW 2.0T FSI
NDN - for 2.5L V6 FSI
NDP - for 2.8L V6 FSI
NDQ, NKP - for 3.0 V6 TDI
NSL, PCF - for 2.0 TDI
The pulley ratios all seem to be the same for the TDI ones, with the FSI being physically different. But the TDI have different codes because the software load will be different for each engine. What is NSL vs PCF? Probably just a later production run, nothing stands out in the parts catalog, and we'll probably never know what/if there's any difference. Probably reflects the new valve body units which appear to start Jan 1 '13.

Notice for the 0AW300048H, there's four different software loads, for RoW vs NAR and for DE2 (130kW) / D95 (120kW) vs D94 (100kW). So would be best to get an NSL or PCF of the software load matching whatever engine you have, if it's a later NSL or a PCF.

George RVT

Thanks for your reply. Very good info. I still have to think if I should repair mine or buy a used one. The bad think about buying a replacement is that people like to lie about the mileage and might end with 2 busted gearboxes. 😂

SMac770

Yeah, that's always the problem with a component with a bad rep. Like the CAEB engine. Blew yours up? So do you drop the coin to rebuild it and know what you have? Or buy a used one and have no idea what you have, other than "it works for the immediate moment".

George RVT

I need a little time to think. The car is at 275k km and the forward clutch is the problem. A workshop gave a possible bad outcome, that it might need to replace the hole ansamble for clutches. The price is 3x of a SH gearbox…

George RVT

I have found a 70k mileage 0AW with PCG code. I saw this one is also for CGLG 177hp engine. I think I will need to ask a pro with ODIS to help with CP.

SMac770

CP isn't the main issue when you change something that is a member of the immobilizer group. Think of replacing a basic piece with no controls, like the EPB module, as tier 1. Then replacing something with component protection, like the radio or amp, as tier 2. Then things that are in the immobilizer group, such as the J393, the ECM, and the TCM, as tier 3.

NRJ / PCG is the 0AW in the B8.5 with 120/130 kW 2.0 TDI. The mechatronics programming might not be quite well matched to the differently sized (weighted) vehicle that is the C7. But it's also going to have different final drive and gear ratios (though the gear ratios are of course all "virtual" on a CVT).
MY13 A4 Multitronic: Gear Ratios: 1st: 2.436, 2nd: 1.626, 3rd: 1.231, 4th: 0.976, 5th: 0.783, 6th: 0.628, 7th: 0.499, 8th: 0.382, Reverse: 2.919, Final Drive: 4.612
MY13 A6 Multitronic: Gear Ratios: 1st: 3.829, 2nd: 1.686, 3rd: 1.241, 4th: 0.960, 5th: 0.760, 6th: 0.605, 7th: 0.481, 8th: 0.608, Reverse: 4.633, Final Drive: 3.091
We see the 1th and 8th gears and the final drive (front diff) are the primary points of difference

Note, those are for a US 2.0T engine. I don't have any info for a EU 2.0 TDI engine for the two vehicles to look at; we didn't get TDI here. But that's something for you to consider.

George RVT

I got in contact with someone local, with experience. I will get the car and the 2nd gearbox to him to check compatibility. He said we can try to copy the software from my NSL(on car).

If not, I will need to see if ECU swap will work.

George RVT

I have completed the switch. Gearbox works very well. New box received the soft from the box from the car. A clutch reset with VCDS and process is completed. 0AW NSL can be replaced with PCG.

El mago

Can I swap the FWD CTV type OAW for the second gen DL382 s-tronic which is a FWD as well??

SMac770

The MLB platform comprises the B8, D4, and C7 vehicles. The only FWD automatic in the B8 A4 and B8 A5 was the CVT, type 0AW. For the B8 Q5, the facelift (B8.5) years did see the type 0CK (code QQQ, MY16, and code SKD, MY17) eventually replace the 0AW. The D4 A8 never used the 0AW; it instead got a FWD version of the type 0BK (ZF 8-speed). The C7 (A6/A7) started out with the 0AW like the B8, but switched to the 0CK for the facelift (MY15). If you want to attempt installing an 0CK (DL382-7F), you'd have to use one from a B8.5 Q5 or C7.5 A6/A7. The 0CK in the B9 vehicles uses the Flexray connected J743 TCM for platform MLBevo rather than the CAN connected J217 TCM for platform MLB.