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

Any auto trannies in here?

  • Thread starter Thread starter dvtr-
  • Start date Start date May 21, 2009
Prev
  • 1
  • 2
First Prev 2 of 2

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
May 27, 2009
#21
  • May 27, 2009
  • #21
A torque converter would really help you get into the power band. The stock torque converter is a bit tight and difficult to get into boost in the first 60'. However, the stock converter is probably a good match for street tires which will be a bit traction limited anyway.

On my auto with nittos, I do a nice long burn out. Then, I stall to around 2100. When the thrid yellow comes on, I nail the gas, activating the 45 shot. Just a moment after leaving the line, 21psi of boost kicks in and gets me moving. That gives a 1.7-1.8 60'. If I'm on my game, I remember to shift at ~5500, and cruise to 12.20's-.30's.
 

04YELLOWGT

Active Member
Jun 29, 2005
1,135
2
39
Indiana
May 29, 2009
#22
  • May 29, 2009
  • #22
I went 11.6@120mp on a BONE STOCK auto just foot braking it, 60' 1.7-1.8.

A trans brake is really unneeded unless your a hardcore drag racer or at least want the absolute best times possible.
 
M

manny

Founding Member
Dec 5, 2001
590
6
16
TAMPA FL
May 30, 2009
#23
  • May 30, 2009
  • #23
where can some one get a drawing or some type schematic to do J mod. my 1st -2 nd is very good but my 2nd to 3rd is like a slush box. thank you
 

1stanger1

Member
Jul 3, 2005
172
1
17
in my house
May 31, 2009
#24
  • May 31, 2009
  • #24
first of all yank that 4r70 out they were junk from the gate
rip it apart ...new clutches ,planetaries and all that good crap

when ford first used the 4r70 everybody thought they shifted great and they were right they do shift nice .....but thats just it nice only goes so far....after awhile they start acting sluggish even with regular maintanance

my advice would be rebuild it put all new guts in it and at least a 3500 stall
thats if your actually draggin it but if your pissing around with those little uncle ben mobiles i wouldnt go that high your just gonna f@$% it up anyway
 
A

agentl074

New Member
May 23, 2009
19
0
0
May 31, 2009
#25
  • May 31, 2009
  • #25
1stanger1 said:
first of all yank that 4r70 out they were junk from the gate
rip it apart ...new clutches ,planetaries and all that good crap

when ford first used the 4r70 everybody thought they shifted great and they were right they do shift nice .....but thats just it nice only goes so far....after awhile they start acting sluggish even with regular maintenance

my advice would be rebuild it put all new guts in it and at least a 3500 stall
thats if your actually draggin it but if your pissing around with those little uncle ben mobiles i wouldnt go that high your just gonna f@$% it up anyway
Click to expand...

Yep +1! My stock 4R70W only lasted three years and I got it rebuilt good. They don't like heat and it killed mine so i got the HD tranny cooler. I have heard that 2400 is a good stall for a DD.
 

CobraRed_96_GT

Active Member
May 20, 2006
1,421
4
39
UCSD/La Jolla
May 31, 2009
#26
  • May 31, 2009
  • #26
agentl074 said:
Yep +1! My stock 4R70W only lasted three years and I got it rebuilt good. They don't like heat and it killed mine so i got the HD tranny cooler. I have heard that 2400 is a good stall for a DD.
Click to expand...
2400 will be unnoticeable unless you are running a 351W and peak torque at at 3k
 

dastang2

Active Member
Dec 11, 2003
2,020
0
46
tx
May 31, 2009
#27
  • May 31, 2009
  • #27
my trans is original and never rebuilt. if you take care of it with regular flushes and don't drive it like a mad man all the time, it will last. 100,000 on the car now. it's a 2000 model. i'm not saying i drive mine great but i do my best.
 

DBMSTNG

I fantasize about it being BIG!
Founding Member
Apr 23, 2002
2,120
0
56
not quite here
May 31, 2009
#28
  • May 31, 2009
  • #28
1stanger1 said:
first of all yank that 4r70 out they were junk from the gate
rip it apart ...new clutches ,planetaries and all that good crap

when ford first used the 4r70 everybody thought they shifted great and they were right they do shift nice .....but thats just it nice only goes so far....after awhile they start acting sluggish even with regular maintanance

my advice would be rebuild it put all new guts in it and at least a 3500 stall
thats if your actually draggin it but if your pissing around with those little uncle ben mobiles i wouldnt go that high your just gonna f@$% it up anyway
Click to expand...

agentl074 said:
Yep +1! My stock 4R70W only lasted three years and I got it rebuilt good. They don't like heat and it killed mine so i got the HD tranny cooler. I have heard that 2400 is a good stall for a DD.
Click to expand...


i have to disagree with both of you. my 4R70W is 10 years old and works just as good as the day i bought the car. i've got probably 100 1/4mi runs and ~400rwhp with only the J mod and cooler as trans mods. it runs perfectly still. if you have problems, it's probably from improper use, like neutral drops or down shifting, or bad maintenance.
 

MaxedGT

Member
Mar 31, 2005
304
0
17
Surrey BC Canada
Jun 1, 2009
#29
  • Jun 1, 2009
  • #29
DBMSTNG said:
i have to disagree with both of you. my 4R70W is 10 years old and works just as good as the day i bought the car. i've got probably 100 1/4mi runs and ~400rwhp with only the J mod and cooler as trans mods. it runs perfectly still. if you have problems, it's probably from improper use, like neutral drops or down shifting, or bad maintenance.
Click to expand...

I agree with you as well. The other two guys are out to lunch. Ford has done several updates through the years and made it into a good reliable transmission. I've probable got 100 runs on mine too and it works great. The j-mod is a good idea to impove the shifts, and a cooler for insurance. I wouldn't use a shift kit though. If you search threads you'll find failures with shift kits.
 

MaxedGT

Member
Mar 31, 2005
304
0
17
Surrey BC Canada
Jun 1, 2009
#30
  • Jun 1, 2009
  • #30
Oh yah, the stock stall is somewhere around 2500 rpm, give or take.
 
A

agentl074

New Member
May 23, 2009
19
0
0
Jun 2, 2009
#31
  • Jun 2, 2009
  • #31
Well I changed the fluid every 20k miles and didn't beat the heck out of it all the time but the only thing I can think of is the hypertech transmission shift firmness making too much line pressure ... or from rocking it in the winter and no aftermarket tranny cooler Either way it blew good - bent fan blades in the torque converter, broke the clutches etc. It wasn't immediate... I noticed the tranny getting rough and then she started slipping several weeks later.
 
Prev
  • 1
  • 2
First Prev 2 of 2
You must log in or register to reply here.

Similar threads

C
5r55s auto to TR3650 Manual swap 4.0 V6
  • Ceskz
  • Feb 24, 2025
  • 2005 - 2014 Specific V6 Tech
Replies
7
Views
1K
2005 - 2014 Specific V6 Tech Mar 27, 2025
89ripper
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
2K
1965 - 1973 Classic Mustangs -General/Talk- Thursday at 9:44 PM
Noobz347
T5 Identification Advice Needed
  • Alldegree
  • Mar 12, 2024
  • Fox 5.0 Mustang Tech
  • 2 3 4
Replies
67
Views
7K
Fox 5.0 Mustang Tech Mar 25, 2024
AeroCoupe
Progress Thread Giving an abandoned 88 GT project a new chance at life
  • jaketractor
  • Jan 9, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
27
Views
2K
Fox 5.0 Mustang Tech Jul 20, 2025
Noobz347
Throttle cut out at 3500 rpm
  • Piranahbite
  • Jul 8, 2023
  • 2.3L (N/A & Turbo) Tech
Replies
16
Views
4K
2.3L (N/A & Turbo) Tech Nov 9, 2023
AeroCoupe
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?