2011 Audi A4 - ZF-8HPauto. What trannys fit with what engine blocks? and vice versa.

[egebhardt]

I have a red 2011 A4 with the ZF 8HP automatic transmission.
I have a 4-banger 2.0T mated to the 8-speed automatic (with paddle shifters) because A4 Prestige with S-Line. Most A4 auto trannies were the 6-speed auto.

My timing chain jumped and the valves are bend. The head is knackered.
I might get a parts-car for the engine and rebuild that.

What trannys fit what engine blocks? and vice versa.

In the hot-rod days, different engines had a pilot bearing on the crankshaft for a manual and no bearing for an automatic. The cranks were different.
With some serious mods, you can make one or the other work but I'm sure that's more resources than I've got.

I might get a car with a 6 speed automatic or 6 speed manual in it. Will my engine fit that 6-speed tranny?
Thanks in advance. PFA -> after spending 20 minutes, i discovered the File Upload Manager only works with Msoft Edge.

a4.jpg

[19birel]

any 2009-2016 A4 (09-17 for A5 & Q5) engine will bolt up to your ZF8 trans. That said I would concentrate my search to a CPMA or CPMB engine to mitigate (not eliminate) risk of extreme oil consumption. This means model years 13+

[egebhardt]

any 2009-2016 A4 (09-17 for A5 & Q5) engine will bolt up to your ZF8 trans. That said I would concentrate my search to a CPMA or CPMB engine to mitigate (not eliminate) risk of extreme oil consumption. This means model years 2013+

Thanks.
You're coming from an area where there may be an engine choice. I am not.
How about this: Would my engine fit on a car with a manual transmission?

[Smac770]

Actually, every B8 A4 with ZF automatic through MY10 used the 6HP28AF (0B6) with flange shaft. And every B8 A4 with ZF automatic starting MY11 used the 8HP55A (0BK) with stub shaft. Only the B8 S4 used the DL501 DCT (0B5), with flange shaft through MY10 and stub shaft starting MY11. The 6MT are all the same, with that same output shaft transition from MY10 to MY11. 0B2 for the A4 2.0T, 0B4 for the S4 3.0T (more power handling, still the same physical bolting).

All the B8 engines and transmissions appear to have the same fitment for the block / bell housing interface. You will need the correct clutch / torque converter and the correct flywheel / flexplate for the specific combination. Yes, there's a pilot bearing on the flywheel if 6MT. But it makes no difference to the engine/crank. Just put the correct pieces on the end for whatever trans you're mounting.

https://www.ilcats.ru/audi/?function...10&language=en

[egebhardt]

Wow! Thanks. That's what I needed.
I'll summarize for my future reading purposes.
When you are talking Flange vs Stub are you talking about the front wheel drive CV axles? A picture of both would be cool.
I'll assume when you say B8 block that it also includes B8.5 blocks, which are all the same.


Automatics
A4 B8 2009-2010 - ZF 6HP28AF (0B6) Flange Shaft
A4 B8/8.5 2011-2016 - ZF 8HP55A (0BK) Spline/Stub Shaft
S4 B8 2001-2010 - DL501 DCT (0B5) Flange Shaft
S4 B8/8.5 2011-2016 - trans - Spline/Stub Shaft

Manuals
A4 B8 2009-2010 - Manual 6spd (0B2)Flange Shaft
A4 B8/8.5 2011-2016 - Manual 6spd (0B2) Spline/Stub Shaft
S4 B8 2001-2010 - Manual 6spd (0B4) Flange Shaft
S4 B8/8.5 2011-2016 - Manual (0B4) 6spd Spline/Stub Shaft

Note:
B8 Engines CAEB/CAED. What is B? What is D?
B8.5 Engines CPMA/CPMB. What is A? What is B?

[Smac770]

I meant spline shaft, but Audi also refers to it as stub shaft with splines. spline shaft is more descriptive than just stub shaft, I guess. But it's burned into my head as stub shaft first, so oh well.


No, the flange shafts for the axles are always the same for a given transmission. Talking about the output shaft for the driveshaft (cardan shaft). Starting MY11, when the ZF transmission was changed from 0B6 6-speed to 0BK 8-speed, all the other B8 vehicle transmissions (the Audi made 6MT and DCT) were changed from flange shaft (what the 0B6 had) to spline shaft (what the 0BK had), except for a few holdovers (B8.0 S5 coupe, B8.0 Q5 3.2L) that used 0B6 till the facelift. Why the need to change the Audi transmissions mid way rather than at the facelift, no idea.

https://www.ilcats.ru/audi/?function...10&language=en

You can see this in the cardan shaft p/n rolls for MY11 (SOP of the MY is generally in the spring/summer transition the year before).
G0K = 6MT FWD
G0L = 6MT quattro (G0L+TC6/T41 is likely the 0B4, vs the 0B2 for the weaker engines)
G0R = 6AT quattro
G0Z = CVT FWD
G1C = 7AT FWD
G1D = 7AT quattro
G1G = 8AT quattro


But that's on the transmission to "car" side. It's all irrelevant on the transmission to engine side.


First three letters are the engine code. Starting with the Cxx codes, a fourth letter was added to denote different output levels. CAEB/CPMA are 208bhp / 211PS / 155kW. CAED/CPMB are 217bhp / 220PS / 162kW.

[Smac770]

If you wanted to sort it by engine+trans combos that actually existed in B8 for gas engines (US emissions), only considering quattro:

2.0T CAE + 0B6 ZF6 (flange) then 0BK ZF8 (spline) / 0B2 6MT (flange then spline)
2.0T CPM + 0BK ZF8 (spline)
3.2L CAL + 0B6 ZF6 (flange) / 0B2 6MT (flange then spline)
4.2L CAU + 0B6 ZF6 (flange) / 0B4 6MT (flange then spline)
3.0T + 0B5 DCT (flange then spline) / 0B4 6MT (flange then spline)

[egebhardt]

Thanks. While I digest all that, I'll post this pic.
engine out.JPG

[egebhardt]

Does anyone have a picture of the spline/stub crank-end vs the flange crank-end?
Thanks in advance.

[Smac770]

0B6 with flange end - https://www.ebay.com/itm/162614487517
0BK with spline end - https://www.ebay.com/itm/335048338999

[egebhardt]

Thanks. The difference is at the end of the transmission which is actually the center diff or what appears to be the output of the transmission. I put those eBay posting pics in the post here because the links will die. It becomes a matter of having the proper driveshaft.

Additionally, I searched a national database for used engines. The nearest CPM engine to my house (shipped from Chicago) with under 100,000 miles is $4,200. Since the car would only be worth about $4,000 when done, this is a NO GO. The car was sent to the scrap-heap yesterday. I'm not going down that rabbit-hole of fixing a base-model A4 when a running/driving (needs maintenance) S4 is sub-$10,000 and getting lower.

0B6 flange end
flange end.jpg


0BK spline stub end
spline stub end.jpg