Yup. 4.10's is the tallest gear I would go on 35's. Ask my buddy austin that blew up his tranny from the 3.73's he had in it running 35's...

 

If I had another ranger/explorer/sport trac with 35's I would want 4.88's without a doubt.
Had 4.88's with 33's on the sport trac, and it was a touch on the low side, 4.56 would have been perfect for that setup.
I didn't do much long highway (or fast highway) trips then so it worked great for me. Still was fine at 70+ but I never saw more than 14mpg from it. Never saw more than 14mpg from my 98 ranger with 3.73's and 33's though either.

 

truk lueks gud

 

i have 4.10s right now nd i guess i'll just go with a wide 35 i liked the look of the 35x15 tire

 

and of course get some 15x10 wheels hopefully