so i was racing my boss today, and i got up to 100mph at about 4750 rpm but it just held there and wouldnt shift into 4th for some reason. any ideas?

A 700r4 is not supposed to go into 4th at WOT.

Does it go into 4th normally?

whats WOT? and yes it normaly would, because ive been up to 125mph before and still had more to go.

WOT= wide open throttle
im pretty sure mine dont go into 4th at WOT, then again i havent driven the damn thing in a year

A stock 700R4 doesn't shift into overdrive at wide open throttle. I have the same issue with mine but never really noticed it untill I changed the gears from 2.73's to 3.42's... I looked into it a while back but never got around to doing it. There are a couple of different parts out there that are supposed to solve this and if I remember right you can swap them with the tranny still in the car.

http://www.thirdgen.org/overdrive-au...c-transmission

You can block the 3-4 PT passages in the TV plunger sleeve, this will give you WOT shifts as long as the governor does not have a higher WOT shift point. This has been posted before by someone who has my instructions on how to do this. If you have a fax I can send them to you. You will need to remove the pan, filter, and the two screws that hold the bell crank on the valve body, remove the pin that is holding the TV plunger, pull the TV plunger sleeve, make the modification, (You install two Allen screws in the two 3-4 PT passages will solve this), and reinstall in reverse order. Cost of two Allen screws, $.034. Dana

what kind of fuel system is it? if its and carburetor check the geometry on the tv cable linkage especially if its a holley