Hi I'm new to the site and I have a question.
I was wondering if anyone knows how much HP the auto 4T45e tranny?
I'm looking into a bit more horse and I wanna know what I would be limited too.

Thanks,

RedBaseBolt

 

I'm not at my home computer right now but I'll post it when I get home. I have an article I found on line with all of the transmission stats. I remember the limiting factor was 220 ft/lbs of torque (HP doesn't play in a transmissions statistics). A race prepared trans will handle over 400, but will cost you at least $2500.

 

Thanks for the info, I'm not too concerned about the cost of getting my tranny upgraded. I'm more concerned about WHERE I could do that. I live about 45 mins away from Toronto.

 

If there is any city in Ontario that should have someone who knows what they're doing TO would be your best bet . There's a large number of performance shops here in London that specialize in transmissions, and I've got a book at home listing every type of shop handling anything related to cars including area, address and phone numbers so I could take a look later on if I remember.

Permafried-

 

That would be awesome, the internet can only do so much. I'm sure that book will have a listing I can't find.

 

Here ya go. Ours is the 4T45E (MN5)

Hydra-Matic 4T40E / 4T45E Transaxle (MN4/MN5)


Type: four-speed front-wheel-drive, electronically controlled, automatic overdrive transaxle with electronically controlled torque converter clutch

Engine range: 2.2L (MN4)
2.2L - 3.5L (MN5)
Maximum engine torque: 190 lb-ft (260 Nm) (MN4)
220 lb-ft (298 Nm) (MN5)
Maximum gearbox torque: 325 lb-ft (440 Nm) (MN4)
325 lb-ft (440 Nm) (MN5)
Gear ratios:
First: 2.95
Second: 1.62
Third: 1
Fourth: 0.68
Reverse: 2.14
Maximum shift speed: 6500 rpm (MN4)
5800 rpm (MN5)
Maximum validated gross vehicle weight: 2075 kg
7-position quadrant: P, R, N, OD, 3, 2, 1
6-position quadrant: P, R, N, D, 3, L
5-position quadrant: P, R, N, D, D3 (MN5, Malibu)
Case material: die cast aluminum
Shift pattern: (2) two-way on/off solenoids
Shift quality: variable bleed solenoid
Torque converter clutch: pulse width modulated solenoid control
Converter size: 245 mm (reference) (diameter of torque converter turbine)
Fluid type: DEXRON III
Transmission weight: dry: 74.7 kg (164 lb)
wet: 85.1 kg (187.6 lb)
Fluid capacity (approximate): bottom pan removal: 7L (7.4 qt)
Complete overhaul: 10L (10.6 qt)
dry: 12.5L (13.2 qt)
Pressure taps available: line pressure
Transfer design: two-axis design, link chain assembly
Assembly sites: Windsor, Ontario
Applications: Chevrolet Cavalier (MN4)
Chevrolet Malibu Classic (MN5)
Chevrolet Malibu (MN5)
Pontiac Sunfire (MN4)
Pontiac Grand Am (MN4/MN5)
Saturn L-Series (MN5)
Chevrolet Cobalt (MN5)
Pontiac Pursuit (MN5)
Pontiac G6 (MN5)
Saturn Ion (MN5)
Saturn Vue (MN5)

 

Just in case you want to look into the book it's called "Power Sport Pages", though their page appears to be down right now. I'm sure you could find it in Chapters or another book store if you're interested.

As far as listings related to transmissions in your area...here goes .

Altech Performance - 416-539-0240
P&J Distribution - 416-541-7451
Stingray Autotech - 905-569-9333
Total Motor Sports - 905-954-0171

That should be a good start for you, I hope the information is accurate but can't guarantee anything, calling all those numbers would make for one hell of a long distance bill for me. It turns out that there are very few shops in Ontario that seem to specialize in this, they were actually all listed under the Tranny/Converter/Differentials section. Sorry it took so long to get it up I left the damn book back home and had to drive to get it on top of installing my friends stereo system for him.

There is one last place but it would be quite the drive for you but thought I'd shoot it out there anyways. There is a performance shop half way between London and Stratford called K&K Racing and Performance and is owned by someone I know. They have actually build their own drag car which they take up to Grand Bend, etc. every summer and it has done quite well. This is the only place of the bunch that I have seen prove their abilities, but that's one hell of a long drive for you to make for a transmission (and I'm not real sure how you'd get back home ). Anyways, the phone number is 519-271-9378 but that could have possibly changed due to their recent move.

Hope some of these help you out (if not then at least this is one big post ), let us know how it goes.

Permafried-

 

Thanks guys! Really appreciate the info! I'm gonna get down to some researchin' now .