FWD torque converter specs

[gpse3400]

I'm looking for the torque converter specs for FWD. I know the transmission database has the info I'm looking for but since it's down right now, I was wondering if anyone had this info avalible.

[asylummotorsports]

Here's what I have
FA 2795 RPM
FK 2760
FB 2560
FC 2385
FZ 2375
FG 2095

Hope this helps

[EspanolaGuitarista]

Are those from the factory, I want to run a 220° cam, that FA 2795 would be a good stall for my Beretta.

[z284pwr]

GM FWD Torque Converters

GM uses the same type 4-digit ID method of identifying FWD torque converters as with the RWD units, however the digits have different meanings. All 125-C, 440-T4, 4T60, and 4T60-E transmissions use the same style torque converter, and they are interchangeable before 1996. 1996-up converters are built to be compatible with GM's PWM TCC apply strategy which means that you can use the newer converter on the older trans, but not the older converter on the newer trans.

1st Digit (application trans)

F -- 125C, 440-T4, 4T60, 4T60-E
2nd Digit (approx stall (depends on engine)

A -- 2795 rpm
B -- 2560 rpm
C -- 2385 rpm
D -- 2095 rpm
E -- 1865 rpm
G -- 1630 rpm
H -- 1515 rpm
J -- 2060 rpm
K -- 2760 rpm
L -- 1895 rpm
M -- 1525 rpm
Y -- 1420 rpm
Z -- 2375 rpm
3rd Digit (TCC clutch material)

0 -- Clutch omitted by factory
5 -- Clutch contains poppet valves
All other digits (pre 1996):

Red Fiber material
1996-97

C, E, H, K, P -- Carbon filled clutch
1998-up

F, H, K, Q -- Woven graphite clutch
4th Digit (Clutch Type)

B -- standard
C -- viscous (stay away from these type)


Pertaining to the TCC Clutch material: starting in 1996, GM implemented a new TCC apply strategy. The 1996-97 trannys (exc 3T40), used a soft-apply (PWM) TCC strategy which was designed to soften the TCC apply so the "customer" would not feel it come on. This means that the PCM is actually making the TCC slip during apply. Only Carbon clutch torque converters should be used in 1996-97 trannys. You can use the carbon clutch TC's in earlier trannys that did not have PWM technology, however the lockup feel will not be the same. However, I have heard that these carbon clutches rarely burn-up or go bad. I have personally used the carbon filled clutch TC's on earlier trannys and the only experience I have witnessed with them is they apply firmer.

Starting in 1998, GM revised the lock-up strategy once again only this time the TCC may never completely lock up and may always slip about 20-60 rpm, depending on the vehicle. This means that even the carbon clutch units would not work well for these applications thus GM started using woven-graphite TC clutch material. I have heard that the woven graphite TC's should not be used in any earlier transmissions because the lockup will not work correctly.

[bu01]

whats the stock stall for a 4t40e and a 4t45e

[asylummotorsports]

Depends on the car

[bu01]

01 malibu 3100v6 4t40e (3.05 ratio)


01 grand am gt 4t45e (3.29 gear ratio)

[Rhedalert]

nice info. My '95 (build date 2/95) has the PWM solenoid and my original tranny had an issue where the lockup clutch would slip under heavy load on the highway after it was driven longer than an hour. I cut the ground wire for the PWM solenoid and that fixed the slipping issue and the clutch applies quick like older GM's I've had. I replaced the tranny recently and still kept the PWM disconnected. My question is since my '95 has this setup, would it have the red fiber clutch? I think it doesn't, according to the numbers I remember being on the tag. Seems GM may have used the old style converter on the "new" type of application.