• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

4R70W Buildup

  • Thread starter Thread starter Stangdriver1119
  • Start date Start date Jul 4, 2007
S

Stangdriver1119

New Member
Aug 24, 2005
231
0
0
Saddle Brook, NJ
Jul 4, 2007
#1
  • Jul 4, 2007
  • #1
I want to strengthen my 4R70W on my 04 GT. Its getting a KB 2.1L installed as we speak. Right now the tranny is purely stock. I know I want to get a 2400-2600 stall converter installed but should I also install a built valvebody with a larger tranny fluid pan or do you think I shouldn't even bother building up the tranny? I plan on leaving the car alone performance wise after the KB is installed.
 
B

bdcardinal

tree hugger
Jun 10, 2003
3,612
16
69
santa barbara, CA
Jul 4, 2007
#2
  • Jul 4, 2007
  • #2
do the j-mod to the trans. if you look on TCCOAs webpage they have a full write-up on it. flush the fluid often with Mercon V fluid. a deeper pan and the largest cooler you can find, as well as extra filters are all good. change out the stock filter. there are also some other mods that include putting a line to the tailshaft housing to ensure proper lubrication there.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
95
134
Jul 4, 2007
#3
  • Jul 4, 2007
  • #3
www.tccoa.com
 

DBMSTNG

I fantasize about it being BIG!
Founding Member
Apr 23, 2002
2,120
0
56
not quite here
Jul 4, 2007
#4
  • Jul 4, 2007
  • #4
the transmission is pretty stout stock. as sugested, do the J-mod. a trans cooler is a must. a larger pan isn't needed. you can upgrade the clutches if you want more power capacity. make sure to get a triple disc torque convertor.
 

Gearbanger 101

Straight Outta Locash
20+ Year Stangneter
Aug 10, 2002
9,457
1,377
234
Ontario, Canada
Jul 4, 2007
#5
  • Jul 4, 2007
  • #5
All good advice above. And just to add, going with anything less than a converter that stalls below 2,800-3,000RPM is a waste of time and money....even with a car running a positive displacement blower. My converter stalls at about 2,800RPM and it's barely noticeable compared to stock. Get a good triple disk unit or heavily fortified large surface single disk unit (like the one i've got) and spend your money right.
 
S

Stangdriver1119

New Member
Aug 24, 2005
231
0
0
Saddle Brook, NJ
Jul 4, 2007
#6
  • Jul 4, 2007
  • #6
Thanks for the advice guys.
 

CobraRed_96_GT

Active Member
May 20, 2006
1,421
4
39
UCSD/La Jolla
Jul 4, 2007
#7
  • Jul 4, 2007
  • #7
yes a triple disc is mostly recommended for any nitrous/FI cars - the smaller the diameter the better. Go above 3000rpm for sure, i have a 3200 and would even want more, but it's a strict DD. Heat is going to be your biggest problem after putting in a TC and any type of shift kit or J-mod. Bigger pan isn't needed but doesn't hurt. Use a large stacked plate tranny cooler and mount it in front of your condensor (there are two holes in your bumper frame already that are a bit large but work well w/ large washers). I also ran an external 3/8" nipple line filter on route to the cooler to be safe. Also make sure to use a fluid that can handle to temp, so any synthetic. Either Mercon V which depending on who u ask is a semi-syn or full syn or use Mobil 1 full syn (this is what i use) your going to need 13 quarts w/ the new cooler lines in, so be prepared to drop $100 just on fluid, lol. GL, should be bad ass!
 
You must log in or register to reply here.

Similar threads

H
Drivetrain 4R70W clutch friction/metals/piston set up questions for transmission guru
  • Hizdudeness
  • Apr 4, 2024
  • Fox 5.0 Mustang Tech
Replies
2
Views
991
Fox 5.0 Mustang Tech Nov 15, 2024
slow84lx
S
M
03 Mustang GT 4R70W trans help!
  • Motox852
  • Feb 20, 2023
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
2
Views
2K
1996 - 2004 SN95 Mustang -General/Talk- Feb 21, 2023
Motox852
M
Place to Avoid: Jamison Auto Group in Gulfport, MS
  • D Durden
  • Oct 20, 2025
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • 2 3
Replies
46
Views
3K
1965 - 1973 Classic Mustangs -General/Talk- Jul 16, 2026
Noobz347
T
Spend my money!
  • ThreeHourShower
  • Mar 19, 2021
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
2K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 21, 2021
a91what
Exhaust Headers - Myths and Secrets...
  • geoklass
  • Jun 20, 2020
  • Fox 5.0 Mustang Tech
Replies
3
Views
5K
Fox 5.0 Mustang Tech Nov 9, 2021
WhiteCobra95
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?