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hp vs mods

04lss

04lss

New member
Hi, so i have heard a lot of different things about the 4t65e hd transmission.
What i really want to know is how much HP can the stock tranny support, after that what mods need to be done to reach the next level, and what will that support etc...
 


04lss said:
Hi, so i have heard a lot of different things about the 4t65e hd transmission.
What i really want to know is how much HP can the stock tranny support, after that what mods need to be done to reach the next level, and what will that support etc...
Click to expand...
FWD with little traction, I've had great luck with the stock trans myself. 11.0 @ 129 mph with weight reduction many runs no problems.

But I do 2nd gear start with the trans in manual mode. That really helps. The 1-2 shift is deadly. A 2nd gear start makes for a more progressive loading with more converter slip... in a good way.
still got decent 60 foot with high 1.6s - 1.7s

If you hook really hard with big slicks on a sticky track, I think you could hurt a stock trans easily, especially with a 1st gear start.
 
Depends on how it was taken care of prior to you owning it.

You'll never know until you start tossing mods at it.

Most (and I say this loosely)...have issues after IC and a really small pulley...or camming...hitting that 300+WTQ normally starts breaking things.

Some have better luck...some break things on stock N/A cars with 160WHP.

it's a shot in the dark, really.
 
I agree with blueguy, my trans has held up to my very mild 3.6-3.4 pulley setup (switched a few times) for over 50K miles now... transmission is still factory untouched at almost 278K. Guessing that was around 230-250 FWHP based on dyno runs of similarly modded cars.

I keep the fluid and filter fresh and clean, as the previous owner has. Aside from that, it's probably luck.
 
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I swapped transmission 3 years ago for hardshifting.. now 3 years later I got slip and bang from a stop and hard shifting from slipping...
like blue said some have good luck some dont
I dont... and im only N/A
 


2nd gear starts for the strip or for the street a very early shift to 2nd gear with smaller turbo work really well. Thats what kept my stock trand alive in two different turbo gtp
 
Down the road i might turbo it... but i know with trans mods thats going to run me about 4-5k. So for now im thinking headers, gutted factory CAI, and an IC, maybe e85. with what ever pulley i can get away with, maybe rockers.
im guessing thats about 250-260 whp But Im not sure. I drove a g37 a couple times this year as a loaner, and id really like the car to be in the same realm as that performance wise and i think id be happy for a while.
the trans on this car was just rebuilt, before my brother decided to stop putting money in the car when he got his a4.
 
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YEEEEARS ago.. my 98 GTP went through 4 stock trannys covered under warranty in a 2-3 year period.

Only mods back then was 3.4", intake, ubend removed.. maybe rockers. Car was only the mid to high 13's.

Some of them would last a few months and only a few dozen runs at the track.

They would go bad while driving down the road or leaving from a stop and something would snap inside.

None of them blew a diff. Always bands and clutches just going to hell.

My PRJ trans got me about 6-7 years of use before started to show some slipping.
 


jdredd said:
YEEEEARS ago.. my 98 GTP went through 4 stock trannys covered under warranty in a 2-3 year period.

Only mods back then was 3.4", intake, ubend removed.. maybe rockers. Car was only the mid to high 13's.

Some of them would last a few months and only a few dozen runs at the track.

They would go bad while driving down the road or leaving from a stop and something would snap inside.

None of them blew a diff. Always bands and clutches just going to hell.

My PRJ trans got me about 6-7 years of use before started to show some slipping.
Click to expand...


Im mainly looking for mid to low 13s, and better handling
 
I wish I would have tried launching in 2nd gear back when I sprayed nitrous. The input shaft probably wouldn't have snapped on that 175 shot pass.
 
04lss said:
Down the road i might turbo it... but i know with trans mods thats going to run me about 4-5k. So for now im thinking headers, gutted factory CAI, and an IC, maybe e85. with what ever pulley i can get away with, maybe rockers.
im guessing thats about 250-260 whp But Im not sure. I drove a g37 a couple times this year as a loaner, and id really like the car to be in the same realm as that performance wise and i think id be happy for a while.
the trans on this car was just rebuilt, before my brother decided to stop putting money in the car when he got his a4.
Click to expand...

If you plan on going turbo. Build the trans for it. This isn't a hard question. The trans WILL break at ~wTQ.. Its just a matter of when and how you drive.. DSmuts snapped his IS very very quickly, I on the other hand have not broke anything but I know its dying... I can feel it.
 
adecker said:
If you plan on going turbo. Build the trans for it. This isn't a hard question. The trans WILL break at ~wTQ.. Its just a matter of when and how you drive.. DSmuts snapped his IS very very quickly, I on the other hand have not broke anything but I know its dying... I can feel it.
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Im trying to figure out the balance of keeping the trans moderately safe, and building more power.
I like to think i could do the turbo and wait for the trans build before i up the boost.... I wouldnt last a week lol.


on a side note, i could always get a junkyard tranny for $200 and build that as i get the money, and swap it in when stock on shatters. hmm
 
You can keep your trans safe by keeping the shifts soft. Rock hard shifts is what breaks stuff if you have to much power
 


Probably because of the power level.

And the prior condition.

And the mileage.

Not because of the shift times, lol.
 
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