9000-88 ZF automatic gearbox

I not sure, but my 89 9000s did the same thing,it did that for two years. One cold winter day after we came home from a trip, my son started it up to go somewhere, he did not wait and warm it up since it had sit for awhile and reverse was now gone. I was told I needed a new transmission.I took it to a shop that was going to put a reman trans in. A week later the shop manager called and said trans was on back order. And he would open it up and look while we wait, It was out anyway I said yes why not. What he said was wrong was that the reverse clutch hub has a bushing in the center, that has a hole that leaves oil in to the clutch, it slipped ( turned) and closed off the hole. He took it to a machine shop and had the bushing taken out of the hub and knurled. It has worked for 2 years and 50000 miles later. By the way $2000 LESS than reman trans.

Jean Paul

I had the same thing happen on my 83 900T, turned out there was no cheap bushing to replace or re-machine. Needed a rebuild, $3,000. Ouch. Has 50K mi on new tranny no problems now.

You can have a transmission shop check your tranny pressure and adjust clearances, but the only thing to do beyond that is take it apart.

dave

Thanks a lot for David and Jean

I also got some good links from Finnish newsgroup and I put those below. http://216.78.172.20/transmission_folder/trans_docs.htmhttp://www.jpat.co.uk/jpat_pdfs/ZF%20Acrobat%20files/ZF%20%204HP18.pdfhttp://www.saabnet.com/tsn/bb/9000/index.html rgs Tuomo

Check it http://216.78.172.20/transmission_folder/9kautoflow3.htmhttp://216.78.172.20/transmission_folder/9kautoflow2.htmPossible problem: dirty governor or its seals. How to manual: http://216.78.172.20/transmission_folder/9kgovsealsb.htm romick