Does anyone know off hand if the filler neck tube on a th400 is the same as the modulator? I crossed the GM # and it came up at work (Napa) as a modulator O-ring. I know sometimes the catalog is wrong. Thanks.
I took my.dipstick out and the o ring is nowhere near the modulator size. Who would of thought the catalog was wrong! I'll just take it with me to work and find an o ring from our stock to fit it.
It also says Driven Gear Fitting O-Ring. Let us know if the o ring below is correct. https://www.rockauto.com/en/catalog...matic,dipstick+/+fluid+filler+tube+seal,10970 https://www.rockauto.com/en/moreinfo.php?pk=64803&cc=1379763&pt=10970&jsn=425
