How much hp can the stock tranny take? - 2003-04 Mach 1 Registry Owners Club

Tomsnumber1 · 07-09-2009, 06:05 PM

i have started my new project and am wondering how much hp the stock tranny will take? im going to be running the hellion T-76 turbo kit and plan on running high boost.i dont know if the tranny will hold up

Lonestar7 · 07-09-2009, 06:37 PM

I would say 400 to maybe 450 any more and your pushing its luck.

LS

R-code17815 · 07-09-2009, 06:38 PM

They break on stock motors.....

MACHJUANito · 07-09-2009, 06:38 PM

ive seen guys with that power, im guessing 500 because i see 475RWHP machs all the time with a stock tr-3650

MACHJUANito · 07-09-2009, 06:39 PM

Quote:

Originally Posted by R-code17815

They break on stock motors.....

very true aswell, buddy of mine broke his with a 260RWHP bullitt. i guess its the abuse and luck

Shane@TM · 07-10-2009, 12:51 AM

Quote:

Originally Posted by Mach1Marauder

I'd be more worried about at what TORQUE the tranny will break.

Mine stood up to 540ft/lbs for a long time and is still living in a Mach1 in S. Carolina.

x2 on abuse. i've seen a 3650 outlast motors in 600hp applications.

im going to keep my stock 3650 after my rebuild this winter, and I plan to make 700+

and if it blows up? pfff...only money

Tomsnumber1 · 07-10-2009, 02:11 AM

So im pretty much fine as long as i dont beat the crap outta the car driving it all the time

mach128 · 07-10-2009, 03:30 AM

Quote:

Originally Posted by Tomsnumber1

So im pretty much fine as long as i dont beat the crap outta the car driving it all the time

just like any car if you beat on it and beat on it it will break very soon, you should be good up to 600hp i would think but to be safe i would say 550hp.

st0ck Mach 1 · 07-10-2009, 07:23 AM

26 spline input...good to go

Darrin · 07-10-2009, 08:28 AM

On threads like this, the first thing I wonder is what transmission we are talking about. Did I miss that part? I looked over the thread several times and haven't found that info yet.

At this point I am only assuming that it's a manual since the people replying seem to have made that assumption as well and not been corrected.

Not trying to be an azz, but it really helps to know as many details as possible when trying to help answer a question.

Since I work on automatics and it hasn't been specified which we are really talking about yet, I will tell you about that end of it. As mentioned, the stock transmissions can be broken on stock power levels and that goes for both the manual and automatic. The 03 automatics are definitely weaker than the 04's for sure. The 04's can definitely handle a mild power adder without much trouble, but not so much with the 03's. Some can and some can't. It's a crapshoot. But, I wouldn't want to put a power number to it because I have seen some break with stock power and some live with more than 600rwhp.

A lot of it truly depends on stuff outside the transmission including everything from and between the tires to the driver. If you want peace of mind then the only way to go is to build everything to handle more than what you plan on asking of it.

Darrin

TRMach1 · 07-10-2009, 08:57 AM

Assuming it is a 5-speed TR3650, mine is still working just fine. As a matter of fact, it's the sole remaining stock part left in my entire drivetrain!

chernandez88 · 07-10-2009, 10:07 AM

I don't know about you guys but I been beating my car with 502 torque and 465 and my tranny is fine. I don't even hear my clutch grinding. Also my friend on his 01 cobra with 750 rwhp has the stock 3650 with a stage 3 clutch and hes raced a couple of times and its fine. I believe is the shock load. I don't think our tranny can hold from the dig but on the highway roll they be fine.

blackbeast99 · 07-10-2009, 10:09 AM

The only thing I have changed is my input shaft...and repaired 5th gear after I broke it...too much boost for little bitty 5th gear

Tomsnumber1 · 07-10-2009, 10:45 AM

sorry i was talking about the 3650.

blown03Mach1 · 07-10-2009, 12:25 PM

Stay away from the Spec 3 clutch and the 10 splined input shaft.....

R-code17815 · 07-10-2009, 12:51 PM

Quote:

Originally Posted by Mach1Marauder

cough.......cough...............driver mod.......cough

I don't doubt it, Mine sucked as soon as I got it, took it to the dealer and found out it was rebuilt 4 times, Told them nevermind dont bother working on it, scraped it and went T-56

Drenath · 07-10-2009, 01:55 PM

Blew my 3650 synchros when my car was bone stock, 36k miles.
Rebuilt the trans, INSTALLED AN MGW SHIFTER
Blower went on at 52k car makes ~430rwhp/400tq SAE
Started to get 3rd gear lockout, did clutch quadrant/FWA, fine now
95k miles on it now and I beat on it daily still have original factory clutch

Tomsnumber1 · 07-10-2009, 04:57 PM

I just put a mcleod stage 3 clutch in mine holds up to 550hp. and i got a adj quadrant to. so i hope i will b fine.

65fastback2+2 · 07-10-2009, 07:48 PM

you need to be worrying about your 28 spline rear tho

Tomsnumber1 · 07-12-2009, 09:47 AM

Quote:

Originally Posted by 65fastback2+2

you need to be worrying about your 28 spline rear tho

Already built. and plus i have a race car. this will just b my street car i wont take it to the track and beat on it

FRiCK · 07-14-2009, 02:44 PM

the life on these is all about proper clutch engadment. if the clutch is adjusted correctley it lengthens the life greatly.... plus the stock auto quadrant setup is garbage anyways. get it out of there!!

now as far as 4th gear pull getting traction ide say in the area of 600rwTQ would be where the input shaft will twist...

Furinox · 07-15-2009, 09:55 AM

Make sure you get it in gear when shifting and get an aftermarket quadrant/adjuster and you'll be fine. The only time you hear about transmission issues its because of the shitty quadrant setup or because people need to learn to shift.

ScreaminMachOne · 07-15-2009, 09:59 AM

Im still alive I have a 26 spline input shaft with a DFX clutch...Still holding up after 6k clutch drops

blackbeast99 · 07-17-2009, 12:37 PM

Quote:

Originally Posted by blown03Mach1

Stay away from the Spec 3 clutch and the 10 splined input shaft.....

Yes. That's the first combo I had and the clutch twisted the input shaft. I now run the MMR RBT700 and will not purchase a different clutch.

07-09-2009, 06:05 PM	#1
Tomsnumber1 Registered User Join Date: Feb 2008 Location: dallas, tx Posts: 221	How much hp can the stock tranny take? i have started my new project and am wondering how much hp the stock tranny will take? im going to be running the hellion T-76 turbo kit and plan on running high boost.i dont know if the tranny will hold up

07-09-2009, 06:37 PM	#2
Lonestar7 Guest Join Date: Apr 2007 Location: Denver, CO Posts: 3,152	Re: How much hp can the stock tranny take? I would say 400 to maybe 450 any more and your pushing its luck. LS

07-09-2009, 06:38 PM	#3
R-code17815 The MODfather #7046 Join Date: Mar 2006 Location: Bloomsburg, PA Posts: 1,360	Re: How much hp can the stock tranny take? They break on stock motors..... __________________ R-code17815 2003 Mach1 6-spd. Black Black Sunshine... The never ending "Work in Progress" RTCTTFMF

07-09-2009, 06:38 PM	#4
MACHJUANito allyourcamsbelong2me Join Date: Jan 2008 Location: Houston,Texas Posts: 784	Re: How much hp can the stock tranny take? ive seen guys with that power, im guessing 500 because i see 475RWHP machs all the time with a stock tr-3650 __________________ 04 Redfire Mustang V6-T5-bolt ons and a gear-14.5@97 (SOLD...never forgotten) 03 DSG Mustang Mach 1-3650-IUP-(BUILD DATE-02/28/2003)-320RWHP 337RWTQ

07-10-2009, 02:11 AM	#7
Tomsnumber1 Registered User Join Date: Feb 2008 Location: dallas, tx Posts: 221	Re: How much hp can the stock tranny take? So im pretty much fine as long as i dont beat the crap outta the car driving it all the time

07-10-2009, 07:23 AM	#9
st0ck Mach 1 not for long Join Date: Aug 2008 Location: santa rosa beach fl Posts: 830	Re: How much hp can the stock tranny take? 26 spline input...good to go __________________ BB/S 324 kooks sully accufab cams heads valves bs3 ls1coils sully rails aeromotive regulator Weldon pump 8gal cell batt in trunk tko500(faceplated) spool upr k foxbody spindles metco upper an lowers 502rwhp.

07-10-2009, 08:28 AM	#10
Darrin Transmission guy Join Date: Nov 2006 Location: Mooresville, IN Posts: 537	Re: How much hp can the stock tranny take? On threads like this, the first thing I wonder is what transmission we are talking about. Did I miss that part? I looked over the thread several times and haven't found that info yet. At this point I am only assuming that it's a manual since the people replying seem to have made that assumption as well and not been corrected. Not trying to be an azz, but it really helps to know as many details as possible when trying to help answer a question. Since I work on automatics and it hasn't been specified which we are really talking about yet, I will tell you about that end of it. As mentioned, the stock transmissions can be broken on stock power levels and that goes for both the manual and automatic. The 03 automatics are definitely weaker than the 04's for sure. The 04's can definitely handle a mild power adder without much trouble, but not so much with the 03's. Some can and some can't. It's a crapshoot. But, I wouldn't want to put a power number to it because I have seen some break with stock power and some live with more than 600rwhp. A lot of it truly depends on stuff outside the transmission including everything from and between the tires to the driver. If you want peace of mind then the only way to go is to build everything to handle more than what you plan on asking of it. Darrin

07-10-2009, 08:57 AM	#11
TRMach1 Once Bitten-Twice Shy Join Date: Aug 2002 Location: New Castle, Delaware USA Posts: 3,370	Re: How much hp can the stock tranny take? Assuming it is a 5-speed TR3650, mine is still working just fine. As a matter of fact, it's the sole remaining stock part left in my entire drivetrain! __________________ Mach1Registry.com Member #7 MCA Member #52787 Nice to meet you, my name's Jim 03 Torch Red Mach 1, 5-speed, IUP *Sold on July 21st 2012!* 2011 Shelby GT500, Ebony Black, Silver Stripes, 6-speed 550hp 510tq Purchased July 23, 2012!

07-10-2009, 10:07 AM	#12
chernandez88 Registered User Join Date: Apr 2007 Location: Miami, FL Posts: 510	Re: How much hp can the stock tranny take? I don't know about you guys but I been beating my car with 502 torque and 465 and my tranny is fine. I don't even hear my clutch grinding. Also my friend on his 01 cobra with 750 rwhp has the stock 3650 with a stage 3 clutch and hes raced a couple of times and its fine. I believe is the shock load. I don't think our tranny can hold from the dig but on the highway roll they be fine. __________________ 2004-Torch Red 5 Speed W/ IUP Single 74mm Borg Warner S400 980HP-925TQ @ 25.8PSI & 15 degree Timing

07-10-2009, 10:09 AM	#13
blackbeast99 Registered User Join Date: Jan 2005 Location: GA Posts: 763	Re: How much hp can the stock tranny take? The only thing I have changed is my input shaft...and repaired 5th gear after I broke it...too much boost for little bitty 5th gear __________________ 2003 IUP Black Mach 1 Built Motor, 2.1KB, and Supporting Mods 567rwhp/530rwtq

07-10-2009, 10:45 AM	#14
Tomsnumber1 Registered User Join Date: Feb 2008 Location: dallas, tx Posts: 221	Re: How much hp can the stock tranny take? sorry i was talking about the 3650.

07-10-2009, 12:25 PM	#15
blown03Mach1 8LB YNER Join Date: Mar 2005 Location: Tampa Posts: 5,661	Re: How much hp can the stock tranny take? Stay away from the Spec 3 clutch and the 10 splined input shaft..... __________________ Just because you're winnin' Don't mean you're the lucky ones TR 2003 (Jezebel) sold Mar 12...

07-10-2009, 01:55 PM	#17
Drenath Registered User Join Date: Feb 2004 Location: Arlington Heights, IL Posts: 641	Re: How much hp can the stock tranny take? Blew my 3650 synchros when my car was bone stock, 36k miles. Rebuilt the trans, INSTALLED AN MGW SHIFTER Blower went on at 52k car makes ~430rwhp/400tq SAE Started to get 3rd gear lockout, did clutch quadrant/FWA, fine now 95k miles on it now and I beat on it daily still have original factory clutch __________________ Azure 2003 Mach 1 - 5spd First Eaton swap - 446 rwhp

07-10-2009, 04:57 PM	#18
Tomsnumber1 Registered User Join Date: Feb 2008 Location: dallas, tx Posts: 221	Re: How much hp can the stock tranny take? I just put a mcleod stage 3 clutch in mine holds up to 550hp. and i got a adj quadrant to. so i hope i will b fine.

07-10-2009, 07:48 PM	#19
65fastback2+2 Too many cars to mod Join Date: Jun 2006 Location: Louisville, KY Posts: 6,945	Re: How much hp can the stock tranny take? you need to be worrying about your 28 spline rear tho __________________ Current Rides: 2011 Ford Fusion 2003 MG Terminator, 2.3 whipple Previous Rides: 2003 DSG Lightning, 486/586, 12.09@111.25 2007 F150 Lariat 4wd Screw 2004 OW Mach 1, auto, 1 of 179 2003 DSG Mach 1, 574 rwhp / 528 rwtq 2003 DSG Mach 1, 13.1 @ 109.1 1988 Mustang GT, stock 1967 TB Coupe, project 1965 Fastback 2+2, A-code

07-14-2009, 02:44 PM	#21
FRiCK Registered User Join Date: Jan 2008 Location: Sacramento,CA Posts: 92	Re: How much hp can the stock tranny take? the life on these is all about proper clutch engadment. if the clutch is adjusted correctley it lengthens the life greatly.... plus the stock auto quadrant setup is garbage anyways. get it out of there!! now as far as 4th gear pull getting traction ide say in the area of 600rwTQ would be where the input shaft will twist... __________________ 01' Mineral Grey Vert -Forged & Studded shortblock @ 9.4:1 -D1SC 8 ribbed @ ~18lbs -3 Core Sheetmetal FMIC -Nazman Lower w/ Roy's 3/8" spacer (soon to be PSR) -Ported 03-04's w/ 96-98 Intake cams -AIS Meth kit -Off-Road X -Steeda Catback -Pro-Motion Kustom Clutch w/ Aluminum Flywheel -3.73's -Tri-Ax -6k HID's 11.5 A/F and 23* #'s soon....

07-15-2009, 09:55 AM	#22
Furinox Registered User Join Date: Feb 2007 Location: DFW, TX Posts: 1,021	Re: How much hp can the stock tranny take? Make sure you get it in gear when shifting and get an aftermarket quadrant/adjuster and you'll be fine. The only time you hear about transmission issues its because of the shitty quadrant setup or because people need to learn to shift. __________________ ________________________________________ Forged Shortblock with Ported Eaton using custom mounting brackets. More information here www.never2fast.net

07-15-2009, 09:59 AM	#23
ScreaminMachOne Missing Third! Join Date: Aug 2006 Location: Sterling,Va Posts: 919	Re: How much hp can the stock tranny take? Im still alive I have a 26 spline input shaft with a DFX clutch...Still holding up after 6k clutch drops __________________ 2004 Mach1-Sold Forged-D1 10.89@128mph

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