Trans Swap Question For Overdrive75

springs fastest alero · 02-01-2005, 11:44 PM

I was curious if you knew what it would take to put a 4t65-e in place of the 4t45-e?
from what I've seen wiring all seems to be about the same. I talked to dhp before and I was told the computer program side for the shift points and stuff is somthing they could do.
I'm posting here instead of in a pm because I feel the info would be usefull to other members as well

-Alero- · 02-01-2005, 11:48 PM

uhhhhhhhhi wanna say, possibly.......possibly (i know nothing about this) that since the 4t65-e is a smaller tranny than the 4t45-e, that there might be some unwanted spare space. and maybe a good tranny mount would help it self out. (that is, if they make the mount for them)

springs fastest alero · 02-01-2005, 11:56 PM

huh?
4t65 is bigger than the 45
mounts are easy to fab
I'm talking wiring and such

-Alero- · 02-02-2005, 12:10 AM

Quote:

Originally posted by springs fastest alero@Feb 1 2005, 10:56 PM
huh?
4t65 is bigger than the 45
mounts are easy to fab
I'm talking wiring and such

god! im an idiot! god! :wah:

sorry i thought the manual tranny was smaller than the auto.

kwhauck · 02-02-2005, 01:57 AM

Quote:

Originally posted by Alero-+Feb 1 2005, 10:10 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (-Alero- @ Feb 1 2005, 10:10 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-springs fastest alero@Feb 1 2005, 10:56 PM
huh?
4t65 is bigger than the 45
mounts areÂ;-) easy to fab
I'm talking wiring and such

god! im an idiot! god! :wah:

sorry i thought the manual tranny was smaller than the auto. [/b][/quote]
dude.......the 4t65 is the GTP tranny..........also auto.......

02-02-2005, 08:51 PM

If you can get someone to do the computer for you, that is the hardest part. Also making sure that that pins on the 4t65E are the same as I beleave they use the the same connector.

Also as far as I know the 3.4L impalas with 4T65E use the same model of controller, just different calibration.

The big question is why do you want to mess with the 4T65E? The T45 has better ratio steps, runs cooler, and weighs less, not to mentions size.

I would not mess with this unless you are talking serious HP and torque. From a pure streetability as well as draggability I would stick with the 4T45E as the ratio change step sizes are better. If you want a different final drive and have someone to do the computer work, go and change up to a 3.29 while you are in there having it beefed up.

kwhauck · 02-02-2005, 08:54 PM

we are talking serious HP, but it will most likely be for me.........he already has his tranny setup

02-02-2005, 08:58 PM

^^when you say serious, what do you mean?

02-02-2005, 09:00 PM

..serious hp.. for you?? big move from show to go kyle

kwhauck · 02-02-2005, 09:01 PM

Quote:

Originally posted by overdrive75@Feb 2 2005, 06:58 PM
^^when you say serious, what do you mean?

400hp

02-02-2005, 09:05 PM

Beef up the 4T45E, it can take 400HP, get a custom trans tune, to get the pressures up and have the guts beefed up you will be fine.

Save yourself that hassel of the T65, it's bigger, runs hotter, and ratio changes aren't as good.

No if you were gonna push 500+ HP then step up.

kwhauck · 02-02-2005, 09:08 PM

Quote:

Originally posted by overdrive75@Feb 2 2005, 07:05 PM
Beef up the 4T45E, it can take 400HP, get a custom trans tune, to get the pressures up and have the guts beefed up you will be fine.

Save yourself that hassel of the T65, it's bigger, runs hotter, and ratio changes aren't as good.

No if you were gonna push 500+ HP then step up.

since you are such a tranny whiz........what do i need to beef up then.........i need a list.....

02-02-2005, 09:11 PM

I am not sure what needs to be done, however that are companies out that that do build up race ready versions of the 4T45E. I know I have read about it on either here or GAGT.com. The biggest thing are clutch plates with higher coefficents of friction, both static and dynamic, same goes for the bands. Also having a custom calibration done by the aftermarket to run at increased pressures.

kwhauck · 02-02-2005, 09:12 PM

Quote:

Originally posted by overdrive75@Feb 2 2005, 07:11 PM
I am not sure what needs to be done, however that are companies out that that do build up race ready versions of the 4T45E. I know I have read about it on either here or GAGT.com. The biggest thing are clutch plates with higher coefficents of friction, both static and dynamic. Also having a custom calibration done by the aftermarket to run at increased pressures.

yeah that is what i figured..........i believe raybestos has some new blue clutch plates out.....

02-02-2005, 09:16 PM

im sorta looking into this, but i dont understand why the beefier 5 speed outta the cobalt wouldnt be the perfect manual tranny to use? unless i find it to be not too much more expensive, im just gonna stay with getting a setup from a cobalt w/ the 5 speed and beef it up....im lookin at 500+hp in the future and dont really see the need for the 6 speed really....but im new to swaps and such so i may be wrong on this

FormulaNERD · 02-02-2005, 10:06 PM

well this conversation is geared (nice pun huh?) toward a 3400 tranny swap/upgrade. i dont know if you're commenting or asking a seperate question.

FormulaNERD · 02-02-2005, 10:06 PM

Quote:

Originally posted by 99Alero_Boy+Feb 2 2005, 07:12 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (99Alero_Boy @ Feb 2 2005, 07:12 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-overdrive75@Feb 2 2005, 07:11 PM
I am not sure what needs to be done, however that are companies out that that do build up race ready versions of the 4T45E.Â;-) I know I have read about it on either here or GAGT.com.Â;-) The biggest thing are clutch plates with higher coefficents of friction, both static and dynamic.Â;-) Also having a custom calibration done by the aftermarket to run at increased pressures.

yeah that is what i figured..........i believe raybestos has some new blue clutch plates out..... [/b][/quote]
you could always just go bulletproof. if you've got the cash that is.

High Performance Bearing Kit (Torrington Bearings)
High Performance Super Pump
High Performance Bushing Kit
High Performance Shift Solenoid
High Performance Reverse Drum
Kolene Steel Plates
Blue Plate Special Clutches (Blue Plate Special Clutches will absorb three times the horsepower of stock clutches. - They also exhibit 300% better coefficient of friction.)

These modifications along with Blueprinting(?) allow units to run with much lower transmission temperatures, and Raised line pressures which in turn improves the durability of clutches, and Bands.

for $575 add a TRUE Preloaded Limited slip option... both wheels grab for serious launches handling 500 + HP

springs fastest alero · 02-02-2005, 10:50 PM

Quote:

Originally posted by wy3134@Feb 2 2005, 06:16 PM
im sorta looking into this, but i dont understand why the beefier 5 speed outta the cobalt wouldnt be the perfect manual tranny to use? unless i find it to be not too much more expensive, im just gonna stay with getting a setup from a cobalt w/ the 5 speed and beef it up....im lookin at 500+hp in the future and dont really see the need for the 6 speed really....but im new to swaps and such so i may be wrong on this

we are talking auto on this one

-Alero- · 02-02-2005, 10:54 PM

Quote:

Originally posted by FormulaNERD+Feb 2 2005, 09:06 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (FormulaNERD @ Feb 2 2005, 09:06 PM)</td></tr><tr><td id='QUOTE'>

Quote:

Originally posted by 99Alero_Boy@Feb 2 2005, 07:12 PM
<!--QuoteBegin-overdrive75

Quote:

@Feb 2 2005, 07:11 PM
I am not sure what needs to be done, however that are companies out that that do build up race ready versions of the 4T45E.Â;-) I know I have read about it on either here or GAGT.com.Â;-) The biggest thing are clutch plates with higher coefficents of friction, both static and dynamic.Â;-) Also having a custom calibration done by the aftermarket to run at increased pressures.

yeah that is what i figured..........i believe raybestos has some new blue clutch plates out.....

you could always just go bulletproof. if you've got the cash that is.

High Performance Bearing Kit (Torrington Bearings)
High Performance Super Pump
High Performance Bushing Kit
High Performance Shift Solenoid
High Performance Reverse Drum
Kolene Steel Plates
Blue Plate Special Clutches (Blue Plate Special Clutches will absorb three times the horsepower of stock clutches. - They also exhibit 300% better coefficient of friction.)

These modifications along with Blueprinting(?) allow units to run with much lower transmission temperatures, and Raised line pressures which in turn improves the durability of clutches, and Bands.

for $575 add a TRUE Preloaded Limited slip option... both wheels grab for serious launches handling 500 + HP [/b][/quote]
skyler for president :cheers:

springs fastest alero · 02-02-2005, 11:12 PM

Quote:

Originally posted by overdrive75@Feb 2 2005, 06:05 PM
Beef up the 4T45E, it can take 400HP, get a custom trans tune, to get the pressures up and have the guts beefed up you will be fine.

Save yourself that hassel of the T65, it's bigger, runs hotter, and ratio changes aren't as good.

No if you were gonna push 500+ HP then step up.

how much bigger is it physically?
from gm powertrain i only seen like a 20 lb weight difference.

main reason for this post was an if its feasable to do
the reasons I would consider it is parts availabillity
there is more aftermarket for the 65
main thing is the worm gear style limited slip diff made by quaife.

power goals for the car I'd plan on putting it in are 400 plus
I know the 45 will hold up to lots I just want the best route as far as how it will hold up and what can be done to it.

so in your professional opnion what would be the best route?
i've seen the eco drag sunfire with a built 65 and for a fwd auto that car is insane!