Another 4r70w swap in progress on 03 Cobra

[mhinchley]

Swapped to big & littles & in that process ran across a used BC Automotive (before the bankruptcy drama) built 4r70w trans for a good price. Price? $2300 for trans with a brake & electronic OD, B&M shifter, & Circle D lock up 4000 rpm stall. Guy put 100 miles on set up & spun a bearing, so been sitting ever since. Sold my 6 speed, flywheel, MGW, whatever is left of clutch, quadrant, for $1500 still in car. Tonight, pulled driveshaft, shifter, mid-pipe. So it has begun............Sourcing other needed parts as I go. I work full time as a machinist....usually 7 days a week & 60ish hours, so this process may take 3 weeks or so to complete. TBD.....

Car is a full exhaust with headers, whipple 2.3, e85, 3.73 built sra with locker, tubular k & coil over front, adjustable rear shocks with eibach springs & passenger air bag, 6 point roll bar, full weight (outside of mentioned).

 

[svt4me38]

That thing should roll!!!

 

[Stanger00]

Let us know how the transmission does with part throttle driving. I have one his last built 4R70W and with a neutral or park Rev the car jumps a little. It also spins the wheels to 20mph when on jack stands. I need to do more data logging to see if it is a tune issue before I start looking for mechanical problems.

I really want to toss in a MVB and stop relying on the ECU.

 

[mhinchley]

That thing should roll!!!

Hoping that is the case. Thanks.

Let us know how the transmission does with part throttle driving. I have one his last built 4R70W and with a neutral or park Rev the car jumps a little. It also spins the wheels to 20mph when on jack stands. I need to do more data logging to see if it is a tune issue before I start looking for mechanical problems.

I really want to toss in a MVB and stop relying on the ECU.

What converter are you using? For sure I will keep this updated. Bought it from a guy on Corral out of PA who spun a rod bearing on a new motor, a short time after installing this. There is a guy fairly local to me who also has a BC unit for sale with dirty dog converter, but it is auto valve body & I just preferred to go manual.

Head is spinning a bit from reading about this harness BS & just trying to locate a 99 GT auto harness. Think that is my only concern at the moment. Well that & the 4000 stall may be a bit too high for a whipple car. Gonna put it in though & give it a whirl. If I have to, I'll take it back out and have Circle D restall it over winter. Delivery date is 9/6 to my house, so have time to get missing pieces together.

 

[Stanger00]

I have a multi disk circle D converter. It's stall is between 3200-3400. The car drives fine it just surges when at stoplights like it has very aggressive cams installed but it doesn't. Have to put my junk in neutral when at stoplights. I'm thinking it's a transmission issue because it only does it in forward gears. For all I know the pressures could be turned up too high causing the converter clutches to drag a little... Who knows.

 

[spray'n mach 1]

something else to check, I had to move my drivers side o2 sensor it came out straight into my 4r70w pan. we had to move it more straight up. good luck

 

[mhinchley]

something else to check, I had to move my drivers side o2 sensor it came out straight into my 4r70w pan. we had to move it more straight up. good luck

I noticed that when I took them out to get out of the way. I have a welder, so no big deal.

 

[spray'n mach 1]

what are you running for lines and cooler?

 

[mhinchley]

I am definitely going to go with a B&M cooler with a fan. Thinking I am going to run steel tubing & just bend & double flare it myself. Rubber hose isolators at each end to allow movement. Making the plan as I go.......but that is what I have in mind at the moment.

What did you do for yours?

Trans is out. Now onto the bell & other BS.

 

[spray'n mach 1]

I started with the rubber hose and metal lines but didn't look very clean so I swapped it out for an fittings and PTFE lines. Just an idea

 

[mhinchley]

no temp issues? that for sure would be easier. was only going with steel lines for heat dissipation.

 

[spray'n mach 1]

I'm running a pretty big cooler. I have a temp gauge but haven't hooked it up yet. Doesn't seem to run hot at all

 

[mhinchley]

Here is the list I have put together that I will update as I go. Should be mostly all inclusive. Until the trans is sitting here, can't be sure. Obviously the trans & converter came out of a running 2000 Mustang, so I ASSUME the electronics, speedo, shift bracket, etc are all correct. Using toggle switches & relays, I plan to wire the trans brake to the coast button on the steering wheel & the line lock to the off button. OD with simply run off a toggle/relay. I already purchased some items like the Mach 1 brake pedal, shift bezel, & block plate.

A little surprising that beyond the trans & converter..........you still need to spend another $1000 in parts, give or take a couple hundred dollars with the pieces you choose. Once I finish going over all this, put in the order by eod on Friday. Most is coming from Summit. Oil is not even listed since I can get that locally, as well as wiring & other misc stuff I am sure to run into.

Flexplate 8-bolt PAX28111 $138
Driveshaft Yoke (1330 u joints) www.dennysdriveshaft.com (2-3-14061X) $70
B&M 70297 Cooler $260
SUM-220984 Hose 10ft (x2) $80
SUM-240114B -6 AN hose to ¼ npt male (x2) $30
Fragola 194568-BL -6 AN to ½ npt male (x2) $52
Derale Temp Gage13009 $50
ARP-254-2901 flex plate bolts $42
Pilot 3 toggle switch kit. $30
ARC-1440 4 relay kit $60
AAF-ALL34152 & AAF-ALL34153 O2 Bungs $18

Total $895


For Reference
ECM F5SB-14A624-----not needed
Trans Kickdown Cable Bracket XR3Z-7B229-AA ------not needed
Shift Interlock Cable F6ZZ-3F719-AC ----not needed
Plug for the Mechanical Speed Sensor F2UZ-7H183-A ----not needed
Digital Range Transmission Sensor F7LZ-7F293-AB. Also called shift position sensor-
make sure you get the kit with the spacers and bolts. -----not needed
99-04 GT 4R70W Transmission Wiring Harness 1R3Z-7C078-BA www.tascaparts.com $65 -----Bought from Torrance and saved $15, so now $50

Shifter Bezel 3R3Z-6304567-AAB ---- Bought it
Brake Pedal Assembly 3R3Z-2455-AA ---- Bought it
Automatic Block Plate ---- Bought it
Dipstick Tube XR3Z-7A228-BA ----with trans
Dipstick XR3Z-7A020-BA -----with trans
Speed Sensor 1L3Z-7H103-AB -----with trans
Shift Lever Stud E43Z-7B415-A -----with trans
Trans Shift Cable XR3Z-7E395-AA -----have hurst cable
Shifter Assembly 1R3Z-7210-AA -----have B&M
Transmission Crossmember and Isolator 2R3Z-6068-FJ -----Using T56 unit
Driveshaft Shop Fdsh14 Aluminum Driveshaft -------$405 (Summit) got one on Corral for $335 shipped

 

[03Steve]

Nice combo!

The Lokar dipstick tube is a headache-free piece.

 

[spray'n mach 1]

Here is the list I have put together. Should be mostly all inclusive. Until the trans is sitting here, can't be sure. Obviously the trans & converter came out of a running 2000 Mustang, so I ASSUME the electronics, speedo, shift bracket, etc are all correct. Using toggle switches & relays, I plan to wire the trans brake to the coast button on the steering wheel & the line lock to the off button. OD with simply run off a toggle/relay. I already purchased some items like the Mach 1 brake pedal, shift bezel, & block plate.

A little surprising that beyond the trans & converter..........you still need to spend another $1000 in parts, give or take a couple hundred dollars with the pieces you choose. Once I finish going over all this, put in the order by eod on Friday. Most is coming from Summit. Oil is not even listed since I can get that locally, as well as wiring & other misc stuff I am sure to run into.

Flexplate 8-bolt PAX28111 $138
Driveshaft Yoke (1330 u joints) www.dennysdriveshaft.com (2-3-14061X) $70
99-04 GT 4R70W Transmission Wiring Harness 1R3Z-7C078-BA www.tascaparts.com $65
B&M 70297 Cooler $260
SUM-220984 Hose 10ft (x2) $80
SUM-240114B -6 AN hose to ¼ npt male (x2) $30
Fragola 194568-BL -6 AN to ½ npt male (x2) $52
Derale Temp Gage13009 $50
ARP-254-2901 flex plate bolts $42
Pilot 3 toggle switch kit. $30
ARC-1440 4 relay kit $60
AAF-ALL34152 & AAF-ALL34153 O2 Bungs $18

Total $895


For Reference
ECM F5SB-14A624-----not needed
Trans Kickdown Cable Bracket XR3Z-7B229-AA ------not needed
Shift Interlock Cable F6ZZ-3F719-AC ----not needed
Plug for the Mechanical Speed Sensor F2UZ-7H183-A ----not needed
Digital Range Transmission Sensor F7LZ-7F293-AB. Also called shift position sensor-
make sure you get the kit with the spacers and bolts. -----not needed

Shifter Bezel 3R3Z-6304567-AAB ---- Bought it
Brake Pedal Assembly 3R3Z-2455-AA ---- Bought it
Automatic Block Plate ---- Bought it
Dipstick Tube XR3Z-7A228-BA ----with trans
Dipstick XR3Z-7A020-BA -----with trans
Speed Sensor 1L3Z-7H103-AB -----with trans
Shift Lever Stud E43Z-7B415-A -----with trans
Trans Shift Cable XR3Z-7E395-AA -----have hurst cable
Shifter Assembly 1R3Z-7210-AA -----have B&M
Transmission Crossmember and Isolator 2R3Z-6068-FJ -----Using T56 unit

looks great...

 

[mhinchley]

Nice combo!

The Lokar dipstick tube is a headache-free piece.

Thanks.
XTD-3AODFM36 $110 I will keep that hand in case I have an issue. Summit delivers stuff to me within 2 days since I live so close. Most stuff comes the following day.

looks great...

Thanks.

 

[Torrance]

If you havent ordered the wiring harness, I have a new in box trans harness for an auto Mach 1 that I was going to use, but I used the US Shift Quick 1 instead.

 

[mhinchley]

If you havent ordered the wiring harness, I have a new in box trans harness for an auto Mach 1 that I was going to use, but I used the US Shift Quick 1 instead.

Sent money for harness. Did not get much ordered today. 1st Grand-daughter (2nd Grand-child) born this morning. Threw off my focus a bit.

 

[Torrance]

Congrats! I'll get your harness out in the morning!

 

[mhinchley]

All parts are now ordered! Moving forward now!

Realized I needed a longer driveshaft, so that is added to the list. Bought from a Corral member.