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unbreakable trans

2

2004GrandPrixGT1

New member
04 gt1 all stock. I keep hearing about the trannies goin out and shift kits, filter changes, complete rebuilds etc. Anybody know where I can buy a 4T65E that'll be decent with a daily driving car but be able to handle a heavy foot? A friend of mine uses Coen but i dont know if they build 4T65's? The tranny in my car is okay and usable I'm just wondering if, when mine goes out, anyone knows who makes a solid transmission. Or any way of beefing up the factory ones to make them more tolerable? Thanks
 


Your title suggests you want a miracle.

The truth is: no transmission in existance will handle abuse forever.

You can buy yourself more time, or treat it nicer.

But if you plan on staying naturally aspirated, I can't see why you'd need an upgraded transmission in any capacity.
 
I guess my title was a bit to durastic, my N/A will stay as is but even now my transmission acts up, so i was just looking ahead to see what you guys have done. RuPaul?
 
Trans go shift kit and some dex VI.

But if you're having any of the known issues: see harmon transmission, tim king or triple edge performance.

Sort of in the opposite order i listed them.

There are some things that go wrong with no known solutions.
 
Okat, i was looking at the Trans go shift kits yesterday. Having a shop install one would most likely extend the life of the transmission right? Any guess on the cost of the installation?
 


Okay, I had a 2000 jetta tdi that i rebuilt the motor on but ive never messed with transmissions, they seem to be the bane to my existence. Im guessing theres a thread on here that would guide me through the process of the install? also where is a good place to buy the shift kits?
 
A shift kit is 20 10mm bolts and about 8 8mm bolts away.

Torque 8mm's to 97 inch lbs
Torque 10mm's to 120 inch lbs

Install a few springs and shims. Very easy with pictures.
 
Not ever a stupid question. Each time we ask questions we learn something. Might be obvious to some, not to others. I had to think about it one day to understand what happens with a shift kit.

A shift kit is installed into the accumulators for the 1-2 shift and the 2-3 shift. The accumulators have a sealed piston in them. What appears to happen is trans fluid fills the accumulator to a point and then pressure makes the shift happen. The shift kit installs stronger springs and some spacers that limit the accumulator movement. By limiting movement..the shift happens faster and firmer.
 


ahh, very helpful. So a hard or prolonged shift is caused by too much movement in the accumulator with varied pressures? When I install the shift kit I was thinking replace the filter, i bought the car a couple thousand miles ago from the White Bear Superstore and my salesman was unclear on whether it was changed or not, so I figure itll probably be a good idea to change it.
 
The accumulator bleeds hydraulic pressure from the pump therebye limiting the amount of pressure available for the actual shift. The less pressure bleed from the accumulator the harder the shift. Some say that stock accumulator pressure is bad for the clutches but makes for a smooth comfortable shift.
 
So is a shift kit with faster, firmer shifts good or bad for the tranny itself? I heard some people say its better for some parts and harsher on others.
 


Okay, thanks. like FriboRage asked, would a shift ki cause some of the parts to wear out faster than they normally would? Alsoi was just reading a thread that recommends a larger trans cooler? Any thoughts on a larger cooler to help the shifts?
 
Another way to increase shift pressure is to adjust the PCM for greater line pressure. I believe this can be done by increasing the duty cycle of the PWM electronically. Requires PCM programming. Some people make the mistake of doing both the shift kit and increasing the line pressure. This should only be done on racing transmissions that can handle the abuse.

There are some other guys on here with a ton of experience with this so maybe someone else will chime in.
 
2004GrandPrixGT1 said:
Okay, thanks. like FriboRage asked, would a shift ki cause some of the parts to wear out faster than they normally would? Alsoi was just reading a thread that recommends a larger trans cooler? Any thoughts on a larger cooler to help the shifts?
Click to expand...

I've heard conflicting opinions on remote trans coolers. Some say that the stock cooling on the radiator is more than enough for 99.9% of the applications out there. The claim is that it's not worth the risk of leaks and blowing the tranny. If you want extra cooling just install an aluminum finned pan and call it a day.
 
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