Quote:
Originally Posted by '16 TT250
Stainless & aluminum is a bad mix, some alloys worse than others. Use anti-seize if you want them to be removable in the future. If the nuts are stainless you'll potentially have even bigger issues, again depending on the alloy; some stainless types will gall and stick badly.
Changing engine and/or transmission types can lead to electronic control issues so I'd suggest keeping it all the same unless you know what you're doing. I'm good with mechanical and afraid of electronics/programming, but to some that part is easy.
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Everything I read in the f150 ford forums are saying change the studs to stainless. The original studs are essentially useless, and weak. And, I've found that to be true. One broke off immediately with very light pressure from my wrench.
As far as the tranny goes, you're right, it takes a whole bunch of messing around to get the larger tranny to function correctly. I won't mess with the original. Even if it goes out I'll sell or trade the 100 for the 70.