Lost 3rd and 4th 4l60e?
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Lost 3rd and 4th 4l60e?
I have a built 4l60e in my car and its having issues. A while ago I broke a ujoint which trashed my drive shaft and broke the rear housing on the trans. When I pulled the trans I noticed that it had also cracked the main case. I bought a new case and had a local trans guy swap everything over. He looked at the internals and said they looked brand new and couldn't find any damage other than the case. I put everything back together and it worked fine on the first test drive but I didn't get on it at all. Today I took it out to test WOT and it lost 3rd and 4th. The weird thing is that it won't down shift into 1st when I have it in 3rd or 4th. It just won't move. If I manually shift to 1st or 2nd they work fine. The fluid looks perfect so I'm at a loss.
Could the trans builder installed something wrong or did it actually break something. It seems like maybe something is wrong in the valve body but I don't know enough about auto's to know. Ideas?
Thanks
Could the trans builder installed something wrong or did it actually break something. It seems like maybe something is wrong in the valve body but I don't know enough about auto's to know. Ideas?
Thanks