hey my dad and i got into a heated debate today about what transmissions are in our cars and if they are the same. i have a 98 gt and he has a 03 gt. i told him that i have a t-45 im mine and his is the t-3650 he said i may be right but it doesn't matter anyway becasue they are the same transmission. We went on and on but i had to take his word for it because he knows everything. (i'm not just saying that becasue hes blood but because the f***in guy knows everything hes an engineer) so i gave him the benifit of a doubt. so heres where you come in. are they the same transmissions? if not whats different about them? hopefully they're not so i can put him in his place lollol

 

Your Pops is right! 3650 had a few upgrades but basically the same! Always listen to your folks

 

Another thing is the OD ratio's in 5th gear are a little different IIRC. Plus, the shifters are different.

 

Yup t45 is the first version and they revised it after the many failures and renamed it the 3650.

 

dammit..... now hes going to be like see i told u so. but on the up side i did just race him on the highway for the first time with all my mods and smoked him lol (40mph-85ish) he may be like ya i was right but then ill just be like ya wana race for it lol. so are parts on the two versions interchangable because my friend who has a 01 gt bought a whole new tranny because the reverse synchro is shot but the rest of the tranny is fine only 23k...... i have 123k on mine and 3rd is starting to go. he said hed give it to me for 50 bucks

 

They aren't the same tranny. You could nit-pick and say there are close, sure they are. But they are not the same.

Engineers do not know everything.

 

50bucks for a good trans w a **** reverse? id take that with out thought... actually if your not, pm me, i will

 

ya i know right 50 bucks. kids parents have more money than god so they buy him everything. but will i be able to swap out parts t-3650 to t-45

yo dimebag i'm grabbin it no matter what and flippin it if i can't swap parts lol nice try though.

 

Sorry to stop this thread on a dime, but here is the real story from a guy who has seen the guts of each and knows the guys at Tremec personally. Here goes.

The t45 is a Borg Warner transmission, designed for the Mustang by BW before Tremec bought their manual transmission division. It's roots have nothing to do with Tremec.

When Tremec bought BW the t45 was costing them so much money in warranty repairs that they immediately yanked it and put in their own 3650.

The 3650 is a ground up design from Tremec and does not share a common gene with the t45. The similarities stem from the fact that they fit the same cars and serve the same purpose, not because they had any common ancestry. A lot of our customers swap the 3650 in for the t45 because they are so similar in application, but from an engineering standpoint they are very different.

I hope this clears things up! AP

 

thanks for the response. so i gues i won't be mix matching parts but still buying the tranny maybe putting it in my car in the future when mine comepletel s**ts the bed. again thanks for all ur help guys