How well will the stock transmission hold up to 420rwhp?

[Stopsign32v]

I'm killing myself between two things...

Getting a T56 magnum and running it on my bolt on car...or taking that $3000 and putting it towards a Eaton swap. However if I did go this route I would be running the Eaton with the stock trans. I could and would under clutch it and go with an aluminum flywheel to take away as much drivetrain shock as possible.

But how strong are these stock transmissions?

[advantagedent]

I have 430 at the wheels and hard on my car some what 56000 klms , so far knock on wood trans holding up fine ,

[deceptimach]

My mach is 410hp/ 373tq the stock tranny is holding up very well. I would suggest putting in a cheap clutch, so it starts slipping before any damage to the tranmission happens.

[watman02]

The 36 in tr-3650is the torque rating of the trans. so its rated to handle 360ft-lbs

[PharmDMach1]

I went with an eaton swap and did a built 3650 from Promotion Powertrain. Tranny was about $1700 with core.

[JaybTorchedMach]

Mine didn't last very long. I started losing third with just bolt-ons and then nitrous finished it off along with the clutch

[Thor]

472rwhp/432trq with no problems.

However, I only had this set for about 7k miles, then I switched to the T56 in pushing the numbers to ensure there would be no problems.

[Chances50]

Ran a stock 3650 with close to 700rwhp on slicks never skipped a beat...

[Supra]

Buddy has over 300 passes on his tr3650, slicks and powershifting. 550 whp

[04JUIC]

461rwhp / 455rwtq Ram stg 3 clutch.. been good to me so far (knock knock)

[fastlane]

I am having good luck so far with my 3650. it was rebuilt about 1500 miles ago and it has been living with 10psi of boost and 475/450 hp/tq for about 1250 of those miles. I know it isn't long term but it is taking the power pretty well so far. I have a T56 ready to drop in however since I really hate the 3650 4th-5th gear gap.

[02gtvertible]

as stated, dont put a good clutch in it. Clutches are alot cheaper than trannys. Run the stock clutch or stock replacements until you can get a built tranny. You want the clutch to slip before it does damage to the tranny.

[Palmer]

I have a stock clutch and 3650 making 452/431 and haven't had a single issue. Yet.

[Dan03mach]

I shattered 3rd gear in mine at the drag strip in a bone stock car. So some life some don't....

[Saltyweasel]

You'll be fine with the stock clutch as long as you don't beat on it. The stock clutch will start to slip before it tears up the transmission.

[lcaptmorg]

My 3rd gear syncros are finally going on the stocker. Wore out the stock clutch and half way through a df unit from completion clutches. I know guys have broken them but mine just won't die. 6000k rpm clutch drops on a all kinds of tires and track comditions. 450+ passes on the thing plus some very spirited street driving. 23k miles. Finally replacing it with a promo unit since the motor and tranny are out.

A bit less hp thought 365 or so rw

[2camsam]

Nitrous and missing a gear killed my second tranny . The first one died behind the stock motor bad shifting and plastic quadrant killed at 7600 miles. My recommendation is don't miss a shift and flush the fluid every year .

[Palmer]

I hurt mine Sunday night. Been having problems hard shifting over 6500 RPM's with the crappy stock quadrant. I was on the highway and it didn't like the 3-4 shift I threw at it and bent a shift fork. I have a really hard time getting mine in and out of 5th gear now. I got a T56 for it and will probably have it swapped in this weekend.