my aunts got 2003 V-6 compleatly stock with a T-3650 tranny. latly it wont go into 3rd gear what is wrong with it. my dad just got rid of his b/c the syncros keept braking and he bought a new tko 600 would that be the problem the syncros

 

sounds like a synchro issue, I just got a new tranny cuz i trashed my input, output, and counter shaft, along with 1st, 2nd, and 5th gear. The shop was curious how a v6 did all that damage, but the strangest part is that it happened at 70mph with cruise control on.

Ryan

 

Yep, it's the syncros. Not sure what's wrong with them, but I've never had a problem with mine, and it's the old T-5 that likes to fall apart when any real hp is ran through them. It may of been the way they were reinstalled, because if they're not hooked up right, I could see them breaking again.

 

i want to say synchro as well, bit 6ers have t5s not 3650s

 

i want to say synchro as well, bit 6ers have t5s not 3650s

 

I have a 6 with a 3650, says tremec right on the side of the housing too.

Ryan

 

t5 is tremec to, they never put the 3650 into a v6

even the s197s still use teh t5

 

The T-5 is not a crap trans. Ive seen many people use these trans with 350+hp daily. So lets get off the T-5 bashing wagon!!

 

Then the dealership gave me 3650 when they replaced my tranny 2 weeks ago, at least that what it says on the reciept. I thought it was a T-5 because I wanted to go with a world class t-5, and tey said it would have to be converted and didn't know what all had to be changed. My info may be wrong, but that's what I have to go off of currently.

Ryan

 

Umm.......... yea it is, after 300-350 rwhp, and about that much torque, they get very iffy. If you romp on it a lot, something is gonna go bad because the stock T-5 is built for normal everyday driving. Yes, they can take some wear, but not as much as you would think they should, why do you think so many 5.0L owners swap out the T-5 totally, of do a G-Force T-5 tranny internal parts upgrade. I'm doing my G-Force upgrade sometime this year.