4R100 Pan Bolt Size
#1
4R100 Pan Bolt Size
Does anyone know the thread size/length of the 20 transmission pan bolts on the 4R100? I am replacing the pan since the rust has finally started weeping ATF, and the bolts need to be replaced as well, they have turned into little rusty nubs. SO i want to use stainless ones.
I could pull one and go to the hardware store, but if someone knows the size i can stop on the way home.
Thanks guys! Happy Friday!
I could pull one and go to the hardware store, but if someone knows the size i can stop on the way home.
Thanks guys! Happy Friday!
#3
#4
Thanks for the information. I know that my 99 F250 SD with the 6.8 has the 20 bolt 4r100. I pulled the pan off not realizing there were two different size bolts until I went to re-install. Just flange bolts my guess is 20mm and 25mm? I'm pretty sure it's just the stock pan but I can't find any information about two different bolts. I just want to make sure I'm putting them in the right place so I'm not stuck heli-coiling.
#7
Join Date: Jun 2003
Location: Damon (South East Texas)
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They shouldn't be an issue, but I'd run a tap in each hole to make the threads are clean past their normal depth. I've had even the stock length bolts bind up in some of them.
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