Full set of replacement friction plates for the ZF 6HP26 and 6HP28 six-speed automatic in BMW 1, 3, 5 Series, X5 and X6 for an overhaul.
If your BMW six-speed slips on the 1-2 or 2-3, flares between gears, or has thrown a gear ratio fault after years on the original fluid, the clutch frictions are usually what the pan is telling you about. This kit is the friction plate set for the ZF 6HP26 and 6HP28, referenced to B183880A, for the larger BMW applications built on those cases. It is the plates only: frictions for the clutch packs you open during an overhaul, so every pack goes back together with fresh lining instead of a mix of new and tired plates.
The 6HP26 is a Lepelletier design: a simple planetary set feeding a Ravigneaux gearset, with five shift elements doing all the work. Three are rotating clutches (A, B and E) and two are brakes (C and D), and every one of the six forward gears and reverse is made by applying two of them at once. That means each pack works in several gears, and a glazed or burnt pack shows up across more than one shift. The mechatronic adapts fill pressure and timing as the linings wear, so the transmission hides the wear for a long time and then runs out of adaptation range all at once.
Rule out the cheaper causes first. A 6HP that is low on fluid or leaking at the connector sleeve can slip and set ratio codes with healthy clutches, and worn valve body bores or a weak solenoid produce the same complaints through low apply pressure. Our BMW 5 Series 6HP shift problems guide walks through the order to check things, and the 6HP pressure control solenoid guide covers the hydraulic side. If the fluid is burnt and the pan has lining debris, the packs are done and a fluid service will not bring them back. On the bench, the E clutch deserves extra attention: GEARS Magazine's 6HP21 E clutch article documents drum tube cracks and feed problems that will burn a new set of plates if they are missed.
The kit is listed for the ZF 6HP26 and 6HP28 in BMW 1, 3 and 5 Series, X5 and X6. Be careful with the smaller cars: many 1 and 3 Series and the six-cylinder 5 Series ran the lighter 6HP19 or 6HP21, which this set does not fit. BMW's own E60 training material, for example, lists the GA6HP19Z for the 525i and 530i and the GA6HP26Z only for the 545i. Read the ZF tag on the side of the case before ordering. Clutch pack makeup can differ between the 6HP26 and 6HP28 and between model years, so lay the new plates against your old ones and match count, thickness and tooth pattern pack by pack. Send us your year and VIN and we will check it for you, or browse the full ZF 6HP parts collection.
If you want frictions, steels and seals in one box, the T18302A 6HP26 master rebuild kit with clutches is the fuller option.
| Transmission | ZF 6HP26 / 6HP28 six-speed automatic |
| Fits | BMW 1, 3, 5 Series, X5, X6 with 6HP26 or 6HP28 |
| Reference number | B183880A |
| Includes | Friction plates for the clutch packs |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is the friction plate set only. Reuse steels that are flat and undamaged, and pair it with a seal and gasket kit, or buy the master rebuild kit with clutches if you want everything in one box.
Probably not. Most 3 Series cars used the smaller 6HP19 or 6HP21, which take a different friction set. Check the ZF tag on the transmission case; it must read 6HP26 or 6HP28.
They share the same basic layout and the kit is listed for both, but pack makeup can differ by version. Count and compare the new plates against your old ones pack by pack before assembly.
Yes, if burnt frictions caused the codes. Check fluid level, the connector sleeve and the valve body first, because those can set the same codes with healthy clutches.
ZF LifeguardFluid 6 for standard 6HP26 and 6HP28 units. ZF lists a few versions, including the 6HP28AF and the Audi W12 6HP26A61, that must use LifeguardFluid 8 instead.
Yes. Clear the old adaptation values with a scan tool after the rebuild and drive the car through all gears so the mechatronic learns the new clutch packs.
