torque converter

[gagt2001]

hey guys just put in a torque converter in the car for a 3500 stall, my problem is 2nd gear doesnt move through as fast and also doesnt hit rev limiter if u have it in 2nd gear, now if u have it in d it will change gear at 5600 rpms. it did throw a code of cylinder 2, 5 misfire. so i changed the wires and the plugs and still same ol thing. any help is truly appreciated.


thanx alex

[Craig99SE2]

A higher stall converter will not move as quickly "through" the gear because it is slipping. Not to burst your bubble, but our transmission will not hold up to those kind of stresses when it finally does engage. You can't just add a converter to a trans. You need to match the shift kit, fluid pressure, etc. Also, 3500 is WAY too high for a street car! I can't imagine driving a Grand Am at 175HP with a 3500 RPM stall converter. I bet it feels like a rubber band that is stretched then flicked ...

I'd suggest going back to a stock converter and spending the money elsewhere!

FYI - there is a similar thread floating around about a TC. Do a search ... he had very similar issues with driveability.

[gagt2001]

what do u mean like a rubber band, and yeah it definately drives diff, a lot more power down low, i also have an aototrans to boost the pressure some what.

[gagt2001]

also its only really a weekend car, i drive my work truck most of the time.cant be to bad then

[Craig99SE2]

Ruberband as in the RPM's wind up and it slowly starts to go and then ... SNAP ... it goes! This places tremendous stress on a transmission internals and clutch packs! Increasing the line pressure won't do it either. It needs to be a MATCHED system. Treat your trans like an engine! You can't throw on 30psi of boost and not put stronger internals in!

The AutoTrans ... yuck ... bad word IMHO! Not designed for our trans just like the B&M gadget. I'd avoid anything besides ASE or DHP like the plague! For more info, see other posts on this.

Just to give you some perspective, here is the "typical" aka "generic" TC breakdown:

2000 RPM - Mild Performance
2400 RPM - Mild to Serious Performance
3000 RPM - Serious Performance
3600 RPM - Serious Performance

What I'm trying to say is a '69 Camaro with a 502 Big Block running 600HP with a 250 shot of nitrous uses either a 3000 or 3600 RPM stall converter. My opinion ... buy something more reasonable! All you are doing is robbing the car of power by absorbing it into the TC viscous coupling.

[gagt2001]

dont our cars come with a 2500 stall already ? it would suck to just take it off and pay another 600 bucks to do it.

[gagt2001]

are u sayin im losing power because of the t/c ? im not to familiar with tranny stuff, seems to feel a lot more powerful. i found a bad plug wire thats were i was getting the rpm problem from

[Craig99SE2]

I dunno exactly what the stock stall is, but I know the W-body has less than 2600 RPM on the non-S/C 4T65 in the Grand Prix. My guess is it would be the same as that. SLP sells upgraded TC's that raise the stall to 3000 or 2600 for N/A.

When I get the turbo installed, I'm only going with a 3000 RPM stall and that will be with 300HP at the wheels! But like I said ... it's just my opinion! If someone gave me a 3500, I wouldn't put it on. I think it is WAY too high for our little V-6's ...