3t40 shift points

[asylummotorsports]

I did a search and didn't find much helpful, so perhaps someone here has the info.
I am just about to install a 3400 and a 3.73 FDR trans into my Beretta.
Anyone have info on how to change, or raise I guess, the 5200 RPM shift point on this trans.
If this has been already covered. Sorry. I couldn't find it.
Thanx

[asylummotorsports]

Bump!
Anyone?

[SappySE107]

Well, its vacuum controlled so I don't have any idea other than perhaps something internal to keep it in gear longer.

[bu01]

3.73 gears, which fwd tranny is this

[sharkey]

he is talking about the 3t40, also known as the th125c. this is not a vaccume controlled tranny

as for raising the shift points, you can try a shift kit (there are a couple out there). another way would be to try adjusting the throttle pressure a bit.

[SappySE107]

What controls the 3 speed if its not vacuum or electronic?

[sharkey]

the throttle cable. it works like a 700-r4, were the throttle cable controlls both line pressure and shift timing. a 440t4/4t60 works like a turbo 350, were line pressure in contorlled by the throttle cable and shift timing is controlled by the vaccume mod.

[SappySE107]

Ah, ok then:P

[asylummotorsports]

Thanx guys.
I'm going to have to do some more playing around with this thing.

[torq455]

It's cheaper to shift it manually. That's what I do.

[z284pwr]

It's cheaper to shift it manually. That's what I do.

That is what I do, even though I don't think its very good for the Trans, 6500 RPM is quite a bit higher than the stock shift points the TGP has

Oh I was wondering, did these newer FWD trans not get the device that makes it automatically shift even though the shift lever is in the specified gear? I know the older Transmissions had those, our "new" Turbo 400 for the Trans-Am still had it in it

[sharkey]

some of the older transmission would do that, the turbo 400 is a perfect example. basicly any newer transmission that is electronic will do that, its programmed into the pcm. in most gm electronic transmissions the manual valve doesnt make any changes when you are in a forward gear, but the MLPS (manual lever position sensor) will tell the pcm what gear you have moved the shifter to, and the pcm will shift the transmission into that gear. if you place it in any gear and get the motor bouncing off the rev limiter a couple times, it will shift.

but as far as i know, the older hydralic fwd trannies (440t4/4t60 and th125) wont do this like the turbo 400 does.

[SHOoff]

I dont know if all the new electronic transmissions work the same way as my GTP does or not, but if you put the shifter in 1 and you get up to it's max shift point (5800 maybe?) it'll just shift into 2nd gear anyways. Never hits the rev limiter. It's some safety crap.

The older 440t4 will stay in that gear if the shifter is there. Unless you're going what it considers too fast for that gear. i.e. 60mph dropping it into 1st, i'll shift to 2 until it's going slow enough for 1.

[torq455]

They're making the newer electronic cars more idot proof. There ARE people out there that dumb to put it in 1st and think somethings wrong with the tranny.

[SHOoff]

They're making the newer electronic cars more idot proof. There ARE people out there that dumb to put it in 1st and think somethings wrong with the tranny.

I was wondering if maybe that's what "abuse mode" or part of it is that's programmed into the PCM. I've always heard about it, but never been told what it actually does.