I have an 03 G coupe 5AT, and this mod has made a big difference, I can now lay down some rubber without the ECU trying to stop me.
But do I "need" a cooler??
This car is a daily driver. I don't track the car or beat on it, I just play every once in awhile.

 

What exactly did you do and who did it for you? Stall???

03 5AT Sedan, sunroof, splashguards, HKS muffler,
14 wire Grounding kit, Z Duct, Stillen HF/AB
Underbody rear diffusers, Drilled alum pedals,
Stillen sway bars H/H

 

spinning tires = slow

5AT/DG/Premium/4pc.Aero
Clear Corners
35% Tint
Aluminum Pedals
18" Iforged 3pce. Aero

 

cato: I had my stock torque converter modified to a 2700rpm stall or lock up

petrog35: Only if your racing, but I thought it was a shame to have a 280hp engine and you can't effectively lay down some rubber, but now I can get into the engines power band more effectively and with the right take off not spin the tires, but get down the road much faster.

<P ID="edit"><FONT class="small"><EM>Edited by raysg35 on 08/09/04 09:21 AM.</EM></FONT></P>

 

who did you go to for the mod?

-T

'03.5 Sedan 5a: BS/G, Prem, Aero/Body, Sport, Nav
Click for MODS - www.teamtransport.org

 

OK, so how did you change the stall RPM? Who did it for you?

03 5AT Sedan, sunroof, splashguards, HKS muffler,
14 wire Grounding kit, Z Duct, Stillen HF/AB
Underbody rear diffusers, Drilled alum pedals,
Stillen sway bars H/H

 

Had a local transmission shop do the work for me, they opened up the stock converter and changed the stall speed.

 

What is the stock stall value? I would expect fuel mileage to decline a bit from an increased stall RPM.

 

According to page AT-244 in the 03 sedan shop manual,the stall speed is 2600-2900 rpm. The stall test procedure can be found on pages AT-51 to AT-52 where it also references the stall speed being 2600-2900 rpm.

2003.5 Black 5AT Sedan
z-tube/ jwt popcharger/crawford plenum/crawford cats/
stillen exhaust/grounding kit/e-fans
technosquare ecu /350z thermostat/double din

 

Automatic transmissions worst enemy is heat! Your increased stall converter will slip and generate more heat. I would suggest an external oil cooler to help prolong the life of your tranny.

2003 G35 Sedan 6MT
14.13 @ 99.55 (stock)

 

Unlikely that you could change the stall speed of an oem torque convertor EASILY without destroying the unit......the new designed DUAL lockup clutches for the 5AT are pretty radical also. Easy to swap old 4 speed AT for higher stall speed smaller diameter units but the 5 speed is a different animal.

I would investigate exactly what was purported to have been done? You would have to remove the tranny, cut the TC open, modify all the turbine fin ANGLES, rebalance, reweld, and reinstall the tranny ~~ $1,000-$1,500+.

The V6 5AT already has a different TC than the V8 5AT, due to the 15% higher cruise rpm vs. speed of the V6.

Will do more research.

 

Sounds like a ridiculous mod. If the main goal was to burn rubber and get quicker launches, it would have been easier to just change the final drive ratio and put in an LSD while he was at it.

 

I bet he just put a shift kit in.

F.Y.A.

 

No not a shift kit, I haven't heard of one for this tranny. I had a local transmission shop take my stock converter and raise the stall.

 

yes there are valve body/shift kits out there for this tranny. several people have already don this

level ten and maximum tuning do this work.

Better Life thru Chemistry
Black on Black 03.5 Sedan 6MT - Goodyear F1 GS-D3's 225/55/17, Custom Intake Tube, '03 "Z" Suspension, Magnaflow resonator, 6 Wire 4 Guage Grounding Kit