Alero transmission Swap ?

[nicothehut]

Hi,
Can anyone tell me if the transmission in 2002 Alero and 2003 Alero are a straight swap ?
Both came out of 3.4L.
My main concern is if wire connection on the 4T45 are all the same though out the model years.

Thanks for your time anyone.

[03Sleepr]

I could only assume they are the same, considering there were no major changes between the two years that I'm aware of

[Shiwnath]

In 03 they were built with stronger parts for reliabilty IIRC.

[nicothehut]

Found out that 2001 2002 2003 all have one off year trannsmissions.

[nixtux]

I put a 05' 4t45 from a Grand AM GT in my 99 Alero. Had to change 1 axle and swap a couple pieces over, but all the connectors were the same.

[jawa]

I put a 05' 4t45 from a Grand AM GT in my 99 Alero. Had to change 1 axle and swap a couple pieces over, but all the connectors were the same.

did you notice any thing different when you drove it ?

[nixtux]

A couple things, I'm going to make a post about it shortly. Have a random
issue I'm hoping someone has ran into.

However, when it is working properly, it shifts considerably firmer. I used HP
tuner to update the FDR, remove abuse/torque management and updated it
to match 05' GA GT the transmission came from.

If I get the pressure issue resolved, I'd say it's a better transmission than
the 4t40 that it had, alas, the original did have insane miles (223k) while this
one has 12k.

[nixtux]

MT

[Redog]

The FDR is 3.29 in the GAGT and that tranny is used as far upto 2009 Malibu.

My tranny is starting to go, so I'm looking

[sleepyalero]

mines starting to go again to i think. might swap it out maybe.