3.33 swap

[Jbrogan]

since it seems that it is going to be a hassel to swap the drive and driven gears in my trani what if i just swap it with a 3.33 out of a 96 monte carlo? could i just use the pcm out of the monte since it has the same engine? or do i even need to swap the pcm, can i just swap em??

[95Grand-Am]

Your car already hass the 3.33 diferential in it. Your chain drive is the problem being a 37:33 making your final a 2.97.

[torq455]

you'd have to reprogram shift points. the pcm looks at rpm not mph.

[Jbrogan]

my trani does not have a 3.33 diff it has a 3.29, also i want to swap the WHOLE trani to a trani out of a 96 monte carlo wich has a 3.33 final drive ratio. it also has the same engine. So i saying put the 96 monte carlo pcm in my car and the monte carlo trani. that way the pcm is the pcm for that engine and trani. i was just asking if the pcms were the same and everything. I dont see how it wouldnt work because im taking a pcm to a 3100 with a 3.33 and puting on a diferent car wich would have a 3100 with a 3.33.

[torq455]

a 96 Beretta right? that will have the 4T60E. that model and tranny already has the 3.33 FDR. at least is should. do you know your tranny model? it's on a tag on the tranny.

[Jbrogan]

no it doesnt it has a 3.29 diff with 37/33 drive driven gears my final drive is 2.93. my trani code is 6wfw.

look it up

http://60degreev6.com/Articles/Transmissions/4T60E/4T60E.htm

[IsaacHayes]

Uhm... Beretta's defiantly did not have 3.33 FDR.

I'm not sure monte PCM would work. Maybe as I think the 96 grand prix swaps with the Venture Van 3400 PCM and that will work in a L body too. Ask 3400-modified he knows about PCM swaps and gear ratios. The VAN PCM's work but they are for 3400 motors but drop right in to berettas.. not sure what trans ratio they had...


If it does work then you still might not be bang on because the monte/grand prix had taller tires than the beretta.

[gpse3400]

A '96 W body trans and computer into a '96 L body? Should work correctly, unless there are any proprietary systems that needs to be delt with. the shifting speeds should be just fine.

[Jbrogan]

thats what i was thinkin but i just want to be sure ya know, dont want to swap the dang thing and then have to swap back, that would SUCK.

[loner666]

the ECM wont work. Trans will

[Jbrogan]

so even though they are both 96 and 3100 the pcm wont work? what will happen if i just swap the trani and keep my current pcm then.

[geldartb]

prob wont shift right

[IsaacHayes]

Contact 3400-Modified he will know the answer. IIRC 96 OBDII doesn't behave as well as OBD1.5 did with gear changes without re-programming the ECM.

[loner666]

your probably right. It will work but most likely wont be very happy unless you can change the setting in the ECU

[3400-95-Modified]

AHHH yikes, I hate miss information... Berettas did NOT come with a 3.33 FDR but they DID come with 3.33 DIFF'S! they are just geared down before the trans, thats where the drive sprocket ratio comes into play.

OK, now you have a 96, NO you can not swap a Monte ECM in and have it work without programming it... I don't think Monte ECM's work with our wiring, the only one I got to work was a 97 venture, and that was with stock tables it worked on a stock 3400 with 3.33 gearing since thats right around what it had from the factory. (3.29 IIRC).

Now with a 96 beretta if you get a 3.33 FDR trans (which will be a pre 96 unit IIRC) I would stay away from it for one, I would much rather get a 98AHW trans which is a 2060 stall converter and 3.29fdr... it has all the new valve body valves and good low roller sprag. BUT either one if put in a 96 will bounce the limiter on stock 96 tuning. 96 uses MPH/RPM limits to shift, both have to be exceeded before the shift will happen and unfortunately after a gear swap the MPH settings are too high for the stock RPM limiter. Now with a 95 it only uses RPM shift logic so it would shift just fine, I proved that with my 95 before I went OBDII, and well I proved what I said about OBDII when I swapped to it, that was the first issue I had to solve, ALONG with the drive sprocket ratio setting in the trans, it will also see the higher RPM per MPH for a 96 and throw a trans component slip code and never go into torque lockup, so you would have to get that code shut off, OR set the sprocket ratio to the right setting, stock is 1.12 you would be 1 if you put in the 3.33fdr or 3.29fdr trans. Oh and most likely you'll have to swap side covers, there were 3 different versions IIRC.

Did I miss anything?

Recap,
95 - go for it...
96 - Not without tuning it wont work