Load the ambulance with 2T of material and an emergency patient on oxygen and hey presto it wouldn't even get out of a courtyard or up a hill to hospital. The symptom was like a norrmal clutch slip, but intermittent.they then proceeded to fit them in Ford based ambulances (!) YES you couldn't ,make it up could you? They generated a magnificent amount of work for us. I'm not sure where you get that story from!įYI, Laycock in their wisdom made a vast number of the later cars with defective unidirectional clutches made out of a forged material. You can't damage the unidirectional clutch, it's far too strong for that. I replaced the fuse and all was well, although it seems to work properly until a few miles have been covered when it's reluctant to disengage but does so after a minute or two (not ideal).Īs yet I haven't done anything about it but would be grateful of advice as to what the cause might be.Īlso, how does one identify which type of overdrive is fitted? From that point I wasn't able to engage overdrive as (I later found when I got home) the fuse had blown.
![laycock overdrive problems laycock overdrive problems](https://www.classiccarparts.co.nz/image/cache/catalog/products_2020/NKC23__1_-500x500.jpg)
There were issues with the overdrive on my journey home, in that after about 50 miles overdrive wouldn't disengage when requested and wouldn't do so until I'd stopped to have a look under the bonnet.
![laycock overdrive problems laycock overdrive problems](https://images.ctfassets.net/nibwymebhuy1/7x3V1Fzqri9mG1bzm2vKlY/b527c0fd43a23ae265dc9ad0f8212cf2/threeraildtypeoverdrive.jpg)
I suspect that the longest single journey it has done for some time was when I collected it from near Oxford to bring it home to near Cambridge, around 95 miles. I recently purchased a 1974 Man-O/D Stag which has had both gearbox and overdrive stripped and rebuilt last year, before my ownership.