performance builds /life expectancy of 4r70w

1TITAN · June 27th, 2009, 10:19 AM

ive got an automatic 01 gt... and i have read a few articles here and there on the trans that kinda worries me and makes me want to know more about either building it (4r70w) or gettin something better.

1. can any one tell why is it bad for the trans to shift into overdrive under WOT

2.i know some places can beef up this transmission but does it affect the strength of the over drive for racing purposes?

the reason i want to try and build this transmission is because for the while ive been using it, it has proven very reliable for street and track use and i absolutly love this thing so if possible i id like to hold on to it and continue to use it

thanks for any of your input

RTRBURN · June 27th, 2009, 04:10 PM

Check out BC Automotive in Danville, Indiana. He builds these transmission for alot of guy in NMRA.

BC Automotive

casper gt · June 28th, 2009, 02:22 AM

don't know what articles you've been reading but these tranny's are VERY strong, you very seldom hear about someone breaking them. as to the overdrive, it's mostly the torque-converter that gives you full thottle o/d shift problems, but at the track you should not be in o/d anyway.

1TITAN · June 28th, 2009, 04:32 PM

if im at the dragstrip then no im not i dont have o/d on but eventually im gonna be on some good sized road courses and im gonna need a 4th gear lol.. but i dont want to blow it up (it sounds funny but a 120mph top speed isnt gonna cut it)

casper gt · June 28th, 2009, 04:53 PM

good luck with trying to sort out an open track car with a 4r70w. all the mods that I've ever dealt with are drag related. from my experiance no auto fares very well in an open track car (all the forced up & down shifts kill them not to mention the heat you'll build up) at a minimun you'll need a tripple disc converter to handle the constant lock/unlock of the converter & every top of the line internal hard part you can get. although it's the opposite in my world (bracket racing) I would think you'd be furter ahead to swap a stick in for what you want.

1TITAN · June 29th, 2009, 08:07 PM

truthfully your absolutly right, the manual is for "the most part" a far better choice then an automatic.
but its really just for the control of clutch and shift timing.

1. the heat isnt a big deal ill just end up getting a cooler for the tranny

2. i dont really expect to be ultra competitive.... although i am lol, but this car is still gonna be drivin to work

3. i would love to make this transmission damn near invinsible none the less

if i dont have to worry about it breaking then i can run down the best of em even in the turns with that auto so its all good lol

June 27th, 2009, 10:19 AM	#1
1TITAN Regular Join Date: Oct 2007 Location: Orlando, Florida Posts: 173	performance builds /life expectancy of 4r70w ive got an automatic 01 gt... and i have read a few articles here and there on the trans that kinda worries me and makes me want to know more about either building it (4r70w) or gettin something better. 1. can any one tell why is it bad for the trans to shift into overdrive under WOT 2.i know some places can beef up this transmission but does it affect the strength of the over drive for racing purposes? the reason i want to try and build this transmission is because for the while ive been using it, it has proven very reliable for street and track use and i absolutly love this thing so if possible i id like to hold on to it and continue to use it thanks for any of your input __________________ destroy in the turns, then obliterate on the straightaway 01 GT with cold air intake and 70mm throttle body, mac long tube headers with some straight piping and a blown motor FORD STANDS FOR FINANCIALY ORDERED AND RARELY IN DEBT

June 27th, 2009, 04:10 PM	#2
RTRBURN Regular 2000 GT 12.82@104 Join Date: Apr 2008 Location: Bowling Green Posts: 118	Check out BC Automotive in Danville, Indiana. He builds these transmission for alot of guy in NMRA. BC Automotive __________________ Ryan Stock 2V Longblock 12.82@104 N/A 11.68@116 150hp

June 28th, 2009, 02:22 AM	#3
casper gt Hardcore Enthusiast 2000 mustang gt auto 13.52@102 Join Date: Mar 2008 Location: cheswick pa Posts: 2,196	don't know what articles you've been reading but these tranny's are VERY strong, you very seldom hear about someone breaking them. as to the overdrive, it's mostly the torque-converter that gives you full thottle o/d shift problems, but at the track you should not be in o/d anyway. __________________ 2000 gt auto http://www.pittsburghracewaypark.com/

June 28th, 2009, 04:32 PM	#4
1TITAN Regular Join Date: Oct 2007 Location: Orlando, Florida Posts: 173	if im at the dragstrip then no im not i dont have o/d on but eventually im gonna be on some good sized road courses and im gonna need a 4th gear lol.. but i dont want to blow it up (it sounds funny but a 120mph top speed isnt gonna cut it) __________________ destroy in the turns, then obliterate on the straightaway 01 GT with cold air intake and 70mm throttle body, mac long tube headers with some straight piping and a blown motor FORD STANDS FOR FINANCIALY ORDERED AND RARELY IN DEBT

June 28th, 2009, 04:53 PM	#5
casper gt Hardcore Enthusiast 2000 mustang gt auto 13.52@102 Join Date: Mar 2008 Location: cheswick pa Posts: 2,196	good luck with trying to sort out an open track car with a 4r70w. all the mods that I've ever dealt with are drag related. from my experiance no auto fares very well in an open track car (all the forced up & down shifts kill them not to mention the heat you'll build up) at a minimun you'll need a tripple disc converter to handle the constant lock/unlock of the converter & every top of the line internal hard part you can get. although it's the opposite in my world (bracket racing) I would think you'd be furter ahead to swap a stick in for what you want. __________________ 2000 gt auto http://www.pittsburghracewaypark.com/

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June 29th, 2009, 08:07 PM	#6
1TITAN Regular Join Date: Oct 2007 Location: Orlando, Florida Posts: 173	truthfully your absolutly right, the manual is for "the most part" a far better choice then an automatic. but its really just for the control of clutch and shift timing. 1. the heat isnt a big deal ill just end up getting a cooler for the tranny 2. i dont really expect to be ultra competitive.... although i am lol, but this car is still gonna be drivin to work 3. i would love to make this transmission damn near invinsible none the less if i dont have to worry about it breaking then i can run down the best of em even in the turns with that auto so its all good lol __________________ destroy in the turns, then obliterate on the straightaway 01 GT with cold air intake and 70mm throttle body, mac long tube headers with some straight piping and a blown motor FORD STANDS FOR FINANCIALY ORDERED AND RARELY IN DEBT

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