3400 Fiero swap questions?

[Drifter]

I have a 3400/4T65-e out of a 2000 monte i'm going to swap into a fiero but have some questions first.

Can the VATS/Passkey be deactivated in this late model PCM?
What about all the other non-drivability items like the antilock-brakes and the traction control?

The reason i ask is that I have heard that it's almost impossible to reprogram OBDII pcm's and expensive also.

[SHOoff]

DHP can reflash the ECU's. I know they can take out auto tranny controls, so they may be able to disable the passkey system. While they're at it, might as well have them disable the ABS/TC some. (for TC to work, it reads ABS sensors)

I know you can run the 3400 with an older 3.1 ECU, but you cant run the transmission.

[Drifter]

I know you can run the 3400 with an older 3.1 ECU, but you cant run the transmission.

Thanks a bunch!

[sharkey]

are you planning on running the 4t65e trans, or are you gonna run a 5 speed. if your gonna run a 5 speed, then id simplify it and use an older 3.1l wiring harness and ecm from a j-body.

if you are going to run the 4t65e, your only choices are run the obd2 wiring harness and pcm and get it flashed to work, or run the 3.1l harness and get a stand alone controller for the tranny.

[Drifter]

Sharkey I am planning on using the 4T/65-E with the obdII pcm.

I like the idea of the 5 spd but i'm doing this more for hwy travel than 0-60 times although i am considering a small amount of boost.

I paid $150 for the whole package of engine/tranny/harness and PCM with less than 20k on the car it was pulled from.

I figured this would be a good combo for added zip over the 2.8/TH125 and maybe a little better milage/reliability.

[SHOoff]

I paid $150 for the whole package of engine/tranny/harness and PCM with less than 20k on the car it was pulled from.

I'd say that's one helluva deal. Shouldnt be hard to get going. Only problem I really see is the anti-theft system. But if DHP can wipe it out, then you're golden.

[Drifter]

I paid $150 for the whole package of engine/tranny/harness and PCM with less than 20k on the car it was pulled from.

I'd say that's one helluva deal. Shouldnt be hard to get going. Only problem I really see is the anti-theft system. But if DHP can wipe it out, then you're golden.

I have had a couple guys tell me i'm full of it! but thats all i paid for the whole thing.

I'm holding back on the install to find out if i can supercharge it without it costing me a fortune.

[Drifter]

Well i think i'm going to give up on this idea and sell the whole package off.

I have contacted 5 people about reprogramming the PCM and not one of them could give me a solid answer on disabling the traction control, antilock or the passkey/antitheft.

I emailed 3 tuning companies and not 1 would return my email let alone have a phone # i could contact them.

So unless anyone has a better idea I think i'm going to have a V8

Al

[SHOoff]

I'm pretty sure the TC is controlled by the EBCM, so it might not even be in the ECU. Except the one part where the TC system requests a transmission upshift.

What companies did you contact about disabling this stuff?

[Guest]

Why don't you run a 440T4/4T40 out of an early '90s W-body? (non-electronic) and an MPFI ECM/harness?

This would be much like the J-body swaps, we do, though we retain the TH125, just because it's a bit easier than trying to slam a 4 speed in there.

https://www.domesticcrew.com

[sharkey]

fyi: the 440t4 is also called a 4t60, not a 4t40. there never was a 4t40, it was an all new tranny in 95, and it was electronic right from the start, hence, 4t40e

[Guest]

fyi: the 440t4 is also called a 4t60, not a 4t40. there never was a 4t40, it was an all new tranny in 95, and it was electronic right from the start, hence, 4t40e

Anybody else I've talked with has said quite the opposite, the 440T4, would be the equivilant of the 4T40 (non-e).
If it's closer to a 60, then that's all the better, but not from what I have read.

[sharkey]

well, being a transmission tech, i know that the 440t4 had its name changed in 1990 to the 4t60. starting in 91 they introduced the 4t60e, and thats an electronic version of the 4t60/440t4. the only difference on the outside of the tranny is that the 4t60e uses a different case connector and doesnt use a throttle cable, were the 440t4 does.

there never was a non electronic 4t40e. it came out in 95, and it was fully electronic. it was an all new design transmission and doesnt share anything from any other transmission. some say the 4t40e is a closer design to a 4t80e (the northstar tranny), wich stands to reason as they were designed at the same time.

[Guest]

giving up to go V8? Dont' be dumb. Use a obd1 wiring harness and computer. Then you dont' haev to worry about all that passkey stuff and antilock.

I have a computer and harness and everything all ready for my setup. I just haven't started on it yet.

[bszopi]

I'm pretty sure I have a GM transmission manual around here somewhere that basically states that the 4T60 and 440T4 are the same tranny. If I find it, I'll post it.