The ZF six-speed torque converters are different to the 5-speed ones and the different engines each have a different converter matched to them. So, for the 6HP26X transmission, for example:

3.0d = Z83 torque converter
4.4 = L93
4.8 = A84

Returning to the 5HP24 transmissions for the E53; apart from the torque converter/bellhousing, the other key differences between the 4.4i (029) and 4.6is (034) transmissions are :

• The larger L51 torque converter means that the fluid capacity of the 034 transmission is 0.88 litres greater than the 029 model
• The D-brake (which is applied in 3rd and 5th gears) has an extra friction & steel plate for the 034 unit i.e. 5 plates instead of 4
• The upper valve block uses different clutch valves for the B-clutch and E-brake (KV-B & KV-E respectively). Although the casting is the same, the 034 block assembly gets a new part number, 1058 327 075, and so the casting is stamped with the number ‘075’ to distinguish it from the 1058 327 068 assembly used in the 029 model





Phil