4v with T45?

ZoomZoomMFer · March 3rd, 2010, 11:52 PM

well i plan to do a termie swap here in the next few months, but i have figured that the motor without trans is much cheaper (usually). I eventually plan on swaping the trans out with a stalled C4, but in the time being will the 45 be ok?

mpe331lx · March 4th, 2010, 12:34 AM

It should be fine. The gears in the t45 are pretty strong. It is the shift mechanisims that are somewhat failure prone. If it has held up so far, you will probably be allright with it behind the Cobra motor.

ZoomZoomMFer · March 4th, 2010, 03:49 AM

ok, thanks for the input. any idea what all i would need for the swap?

acidtonic · March 4th, 2010, 10:21 PM

It's iffy at that power level without a rebuilt T-45. You might go 2 years or 2 months. Way too many variables.

My advice....

Dont overclutch the car.
Run a softer sidewall tire to absorb more shock.
Get a well balanced driveshaft with the proper pinion angle.
Dont drop the clutch at 6K especially if you have good traction, and let the rpm drop a hair between your 1st to 2nd shift. Not saying to granny it but dont go all pro slamming into 2nd 50-100 rpm from redline.

I'm not saying you need to do any of this for it not to break, but if you're worried and a tranny failure would really rock your world financially possibly leaving you without a car...... I'd follow that advice.

Have fun and keep us updated on your swap

wraitherx · March 4th, 2010, 10:30 PM

Originally Posted by acidtonic

It's iffy at that power level without a rebuilt T-45. You might go 2 years or 2 months. Way too many variables.

My advice....

Dont overclutch the car.
Run a softer sidewall tire to absorb more shock.
Get a well balanced driveshaft with the proper pinion angle.
Dont drop the clutch at 6K especially if you have good traction, and let the rpm drop a hair between your 1st to 2nd shift. Not saying to granny it but dont go all pro slamming into 2nd 50-100 rpm from redline.

I'm not saying you need to do any of this for it not to break, but if you're worried and a tranny failure would really rock your world financially possibly leaving you without a car...... I'd follow that advice.

Have fun and keep us updated on your swap

very sound advice right there. I had the unfortunate experience of good traction and slamming it at redline and grenaded the tranny 6 months after my build. didnt want to go with a t56 so i just got her rebuilt with promotion parts. I did the same thing with my old fox's t-5 and thought i had learned my lesson but nope

ZoomZoomMFer · March 5th, 2010, 12:22 AM

thanks for the info guys

98Cobra_sleeper · March 7th, 2010, 09:04 AM

how much did the promotion rebuild cost you? was it rebuilt to stock specs or upgraded for a higher HP application?

March 3rd, 2010, 11:52 PM	#1
ZoomZoomMFer zippeewannabee 06' Mazda Speed6 Join Date: Jul 2007 Location: Orlando, Florida Posts: 3,211 iTrader: 17 reviews	4v with T45? well i plan to do a termie swap here in the next few months, but i have figured that the motor without trans is much cheaper (usually). I eventually plan on swaping the trans out with a stalled C4, but in the time being will the 45 be ok? __________________ Cobb SRI \| Eibach ProKit \| JBR Short Shift Plate \| JBR Rear Motor Mount

March 4th, 2010, 12:34 AM	#2
mpe331lx Regular 9.74@142 Join Date: Dec 2008 Location: SWFL Posts: 367 iTrader: 0 reviews	It should be fine. The gears in the t45 are pretty strong. It is the shift mechanisims that are somewhat failure prone. If it has held up so far, you will probably be allright with it behind the Cobra motor. __________________

March 4th, 2010, 03:49 AM	#3
ZoomZoomMFer zippeewannabee 06' Mazda Speed6 Join Date: Jul 2007 Location: Orlando, Florida Posts: 3,211 iTrader: 17 reviews	ok, thanks for the input. any idea what all i would need for the swap? __________________ Cobb SRI \| Eibach ProKit \| JBR Short Shift Plate \| JBR Rear Motor Mount

March 4th, 2010, 10:21 PM	#4
acidtonic Hardcore Enthusiast 97 Cobra Join Date: May 2008 Location: Royal Oak Michigan Posts: 1,056 iTrader: 0 reviews	It's iffy at that power level without a rebuilt T-45. You might go 2 years or 2 months. Way too many variables. My advice.... Dont overclutch the car. Run a softer sidewall tire to absorb more shock. Get a well balanced driveshaft with the proper pinion angle. Dont drop the clutch at 6K especially if you have good traction, and let the rpm drop a hair between your 1st to 2nd shift. Not saying to granny it but dont go all pro slamming into 2nd 50-100 rpm from redline. I'm not saying you need to do any of this for it not to break, but if you're worried and a tranny failure would really rock your world financially possibly leaving you without a car...... I'd follow that advice. Have fun and keep us updated on your swap __________________ Converted to the Dark Side. 06 Apex Silver Evolution IX GSR - Turboback Exhaust, Tune - Wideband O2, Trustz backlight gauges, Apexi turbo timer - Stock wing, but soon to be wingless. - Guessing 280-310 at the wheels. 02 Red Escape V6 4x4

March 5th, 2010, 12:22 AM	#6
ZoomZoomMFer zippeewannabee 06' Mazda Speed6 Join Date: Jul 2007 Location: Orlando, Florida Posts: 3,211 iTrader: 17 reviews	thanks for the info guys __________________ Cobb SRI \| Eibach ProKit \| JBR Short Shift Plate \| JBR Rear Motor Mount

March 7th, 2010, 09:04 AM	#7
98Cobra_sleeper Enthusiast 1998 mustang cobra Join Date: Jul 2009 Location: pa Posts: 617 iTrader: 0 reviews	how much did the promotion rebuild cost you? was it rebuilt to stock specs or upgraded for a higher HP application? __________________ HP twin turbo - 691hp/608tq with 15lbs huffed in (old setup) comin soon...ON3 turbo kit, PTE7175

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