Transmission Parts Chrysler ZF ZF8HP45 845RE Internal Clutch Hub

Print Share

Symptoms:

Failsafe mode
Gear ratio codes
Code P0731
No 2nd
No 3rd
No 4th
No 6th
No 8th

Cause:

The lock splines on the "E" clutch hub have broken/sheared off, and/or the clutch splines are heavily worn.

Correction:

Restore normal operation and avoid comebacks by installing upgraded Sonnax heavy duty "E" clutch hub.

Warning:

ZF8HP45 and 845RE units are equipped with a 53-spline "E" clutch hub from the OEM. However, some ZF8HP45/845RE applications may have been updated to an OE 62-spline hub and planetary due to a previous failure. Make sure to verify spline count before purchase.

845RE, ZF8HP45

Heavy Duty "E" Clutch Hub
Part No. 35572-53T

53 Splines

Find a Distributor

Vehicles with ZF8HP45 and Chrysler 845RE transmissions utilize an "E" hub that is made from weak, cast A380 aluminum. This material is no match for the high torque generated in these applications. The lock splines of the hub are prone to shearing or breaking, resulting in failsafe, ratio codes and loss of movement. In addition, the steel clutch plates dig into the splines on the drum, causing the plates to hang up and burn. This can happen in as few as 20,000 miles.

Sonnax heavy duty "E" clutch hub 35572-53T is crafted from forged 4000-series aluminum, the same material used for high performance engine pistons. The Sonnax billet hub features a far superior yield strength versus the OE hub, so you can rest easy knowing it will stand the test of time — no more worrying about comebacks due to a failed OE hub.