I called Ashcroft Transmissions in Luton as they specialise in the Range Rover version of the 4HP22 (which is the same as this one apart from the output shaft), and got told that they weren't interested.Ī nice place in London whose name I forget quoted £800 fitted which was OK There's very little info on the web regarding rebuilding automatic transmissions, and nothing on the ZF4HP22. Took me about 1 1/2 hours, and I was nearly home Gearbox rebuild Naturally the local constabulary turned up at this point and insisted that my joy ride should finish there!!!īy my calculations that's about 10 miles in reverse. Around the three roundabouts, and towards Little Stukeley. Under the A1, up the hill to the BP truckstop. Over the narrow bridge, turn left towards the Al. I reached Alconbury Weston, turned right and then left into Alconbury. I whizzed along (with the traffic, just the van facing the wrong way), towards Old Weston, then turned left towards Alconbury. I passed through Clopton, turning right for Old Weston. Then I discovered that reverse gear was still good. The engine revved, but the van would not budge. Titchmarsh was touch and go, and finally on the road towards Clopton all forward motion stopped. I decided that the best way was not on the dual carriageway, but I thought that maybe I could limp along the back roads, so I headed to Titchmarsh. The slipping was getting worse & worse in Northampton, but I managed to get back as far as Thrapston. This necessitated a trip to Northampton (I live in Huntingdon) to pick up the cylinder heads. The Landie was off the road, so I decided to finish the Landie before the van broke. The other symptom was rising engine revs with no increase in road speed.
That means that the governor is getting clogged with debris from a clutch. I knew the gearbox was on it's way - the classic symptom of the 4HP22 failing is 'hanging in first gear when cold'.
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