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Can I use a transmission from a 1998 F150 (F85PHA) in my 1999 F150?

(1999 Ford F-150)
in Fort Johnson, NY on January 07, 2016
If so which transfer case do I need a 4R100 or 4R70w. Thanks
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on January 07, 2016
4R100 and 4R70W is the MODEL of the TRANSMISSION. the 4R70W is the most popular.
the 4R100 is used on most if not all of the 5.4L engines and some of the 4.6L vin R(8th)digit of the vin,BUT, the 4.6L vin W uses the 4R70W can look at the door sticker and under TR,and if it has an E,then you have the 4R100.if it's a U,then it's a 4R70W tranny.if you call a junk yard,they will have all that info a put you in the right direction.The only F150's that really got the 4R100 are low emissions versions sold in states like California. The 4R70 is not low emissions certified.
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on January 07, 2016
Thanks for the information. I was told the 1998 transmission would work for my 1999 F150 when I bought the 1998. Both are 4.6 engines and today I learned the transmissions are different but both do use the 4R70w's. Now I have the 98 f150 and can't use the transmission. I was told by two junkyards that I have to get a transmission from another 1999.
on January 08, 2016
ok,from what i know,is there are two different 4.6L of them is a windsor and one is a romeo.the difference is the 8th digit of the vin#,made in two different plants?the romeo engine 8th digit is a W,and uses the 4R70W tranny.the windsor engine 8th digit is a 6,which uses the 4R100 tranny.if you have a 98 and a 99 vin W and they both are 4 wheel drive then the tag numbers would be the same.(F85PHA) then they would's very confusing!! i have a 2000 F150 4.6L 2WD vin#W supercab with 310,000 miles on it and it has the 4R70W tranny, and still a rolling.tranny rebuilt several years ago,$1250.00,BUT that price has went UP since then.why FOMOCO did this,i don't have a clue?don't know if it will help,but i would get some more opinions from tranny shops and or the dealer parts/service person may give up some info.good luck and post findings.
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