Talk:ZF 4HP transmission

Some of the information looks like its been copied from Ashcroft Transmissions which they claim copyright on. https://www.ashcroft-transmissions.co.uk/frequently-asked-questions/4hp22-faq-s.html

I have a 4 speed ZF Auto and it sticks in first gear in the morning or when cold and is reluctant to change up from 1st gear. Once the gearbox has warmed up it shifts normally. Why?

The governor valve is sticking, which can be caused by contamination. i.e. clutch plates or other parts disintegrating. The fine debris finds its way past the filter and tends to accumulate in the governor, causing it to stick. A temporary solution is to remove and clean the governor. The problem will often recur as debris from damaged parts continues to build up in the governor. If the problem continues after cleaning the governor then it may be necessary it replace your Autobox.

Tanis8472 (talk) —Preceding undated comment added 11:10, 2 April 2019 (UTC)