Eiter a t-45 or 01 to 04 tremec tr-3650 will fit the question is wich one will last the longest.

the tr3650 is an updated version of the t45.
it is stronger but not bullet proof.

if you are planning on mother mods along the way i'd get an upgraded version from americanpowertrain that goes for 1100$ and will take 430 lbs_tq

so, I don't have to modify the crossmember, etc. in older vics with the 3650? (I had read that it was only the T45 which would bolt right in and then only certain years and versions)

Thanks for the tip. I've found several upgraded versions. One T45 rated to 750ft-lbs at 8000rpm and several comparable TKO's.

Basically, I'm just looking for something that would be *mostly* plug and play.

That was a pleasure :P

Well, the modifications to the cross member are very minimal, you<ll have to cut a bit of the part that bolts to the trans a little bit but it is very easy to figure out, thats not at all the biggest issue of the swap...

I notice you also have a '97. Would the T45 have been any more plug and play?

I am trying to get away with only drilling two extra holes:
one through the firewall and one through the floorboard.

Did you go with mechanical clutch? (I have heard that mechanical clutches are much easier to install)

thejsx1, how did you do your pedal setup?

Thanks for all the help, guys. I really appreciate it.

no matter if you get a t-45 or tremec tr3650 they are externaly the same so you will have to modify the crossmember anyways.
He also has the cable clutch desing on his car pretty much based on the same pedal set-up than me

Thanks for the info, 2004_P71. That clears up a lot!

It sounds like I should look for a TR-3650 with a mechanical speedometer and mechanical clutch?

Which years would that be?

they came in the 01 to 04 mustangs
they can be found on ebay fr 900$ rebuilt
and upgraded for 1100 at american powertrain

If you use a 96-98 GT T45 it would bolt up without crossmember modifications if the crossmember is the same as a '93. The Cobra t45 rear mount different.

READ THIS from Modern Driveline:What's up with T-45 Transmissions?

Borg Warner T-45 transmissions were only used behind 4.6L single and dual over head Mustangs from 1996 to 1999. TREMEC, in 2000, replaced the T-45 with the TR-3650 which is very similar in design. The T-45's design is very much like the T-56 six speed transmissions. In fact the T-45 and T-56 share many of the same parts. It has single rail gear selector and carbon lined steel synchro rings making it a smooth shifting transmission at high rpm's. The gears are larger and stronger then a T-5 and about the same as a TREMEC 3550 in size. The T-45 is the first transmission in the B/W -TREMEC lineup with a built-in bell housing so it can not be exchanged. This limits the T-45 to 4.6L mod motors as the bolt pattern is different than the Windsor push rod motors.

T-45 from 1996-98 GT are different than the Cobra Mustangs. The transmission mount point is moved further back for the Cobras and as well as a 8 tooth drive speedometer gear. Cobra T-45's are equipped with a 7 tooth speedo gear. In 1999 all T-45's were changed to the Cobra specs. Why this was not done earlier is not understood.

T-45 shifters are the same as the T-5 shifter, therefore, any aftermarket shifter will work on both transmissions. Borg Warner WC T-5/T-45/T-56 all use ATF oil or Synthetic ATF. No other oil should be used. Redline MTL should not be used. Redline ATF is fine. My recommendation is to use Amsoil ATF as I have used it for years at the track with great results.

Georges93LX, that was a very helpful post. Thanks. I have now found a T-45 in good condition that I will rebuild in the future to accommodate the extra power of any future mods.

If anybody is interested in where to find upgrade parts (searching Google didn't yield me anything), some Mustang forums had these links:
http://www.keislerauto.com/
http://www.promotionpowertrain.com/TRANSMISSIONS.html
T-45 parts:
http://www.promotionpowertrain.com/NEW_T45_Xploded_View.html
http://www.hanlonmotorsports.com/?q=node/4
I hope some of these links are helpful to others who just want a "direct bolt-on" kind of setup.

Have my swap+various modifications finished to my '05, just waiting on the tune from Lonnie to show up in the inbox and then the first test drive!

I'll be making a thread with my own pictures/worklog/helpful details soon.

good work man
I'm sure you'll love it

heres a video up-date abouth the pedals

Good video. I'd say it was spot on.

I would like to emphasize that the stock pedal box must be reinforced. I went through a bunch of cables and a lot of welding, and rewelding because mine kept flexing. It got to a point where it was binding and started pulling the firewall in a bit. I reinforced the crap out of it and it's good now...would've been better to get it right the first time.

Excellent! Beyond excellent!

Thanks for taking the time and making this video.