They are a perfect fit for me! Don't know why someone has problems? I used them to replace a 4l80e with my 2006 GMC Sierra 1500 4X4. Later model 4l80e with rear return. Perhaps the dimensions of the fittings are different on the older 4l80? Also, whoever takes them off is dragging. These are pressure fittings, not locknuts. If you cannot understand this, then you should not do this work in the first place.
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