Transgo kit.

Import Hater · July 30, 2003

After diagnosing a problem with a flare up on a full throttle 3-2 downshift and a double bump engage on the 4-2...I've determined that the accumulator isn't filling up enough. Rather than have the same weak parts put in under warranty, I want to put in heavier duty parts and a Corvette servo. Has anyone else done this? And if so, how much harsher are the shifts? Are they like tire chriping level or just below it? Or will I be surprised and the shifts are still pretty tame?

Rob

americanmuscleman · July 30, 2003

You might know this, but the way you determine how firm the shifts are is by the number of "washers" you install. There are three washers, and four ways to set it up. No washer- real smooth, stock-like shifts. One washer- firmer shifts, and likely what your after. Two washers- it starts getting a lot firmer and will bark the tires on part throttle shifts. Three washers feels like a crash box. Unless you have installed a fairly loose torque converter, two washers will be very firm, and three washers definitely is overkill.

For your application, I would try one washer first. It will allow you to have softer part throttle shifts, but be firm enough to chirp the tires on the 1-2. If it turns out to not be enough, you can always go to two washers.

Good luck, and I'd definitely recommend the Transgo kit over a B&M.

Import Hater · July 30, 2003

Master Tech I may be, but I haven't cracked open a 700R4/4L60 since school...so I'm only a little sure abot what you're taing about. The washers just preload the springs right? Kind of a different way to go instead of just adding heavier springs.

The owner of the transmission shop next to mine suggested just putting a turn on somethng called the EPC solenoid. For the electronic controlled trannies, it's pretty much like putting in a shift kit. I'd rather just put in the heavier duty springs, servos,and what not.

There's two different kits for the 4L60E from Transgo. One with a HD2 suffix and another with an EL3. The latter saying it has "stick shift" manual control. Don't think I need that. But what exactly is it anyways if you know. But both say computer calibration may be necessary after installation because they may cause problems with torqe management. That's my only worry.

Rob

americanmuscleman · July 31, 2003

Exactly, I think the washers just preload the springs to adjust the line pressure.

As far as the two different types of shift kits, I think the latter of the two is one that converts the shifting over to something like a manual valvebody. You have to shift the gears up and down, where as the first shift kit allows you to manually upshift and downshift, but you can also just leave it in Drive and go like normal (probably what you want).

As far as the torque management goes, I'm not sure how that would cause problems. You might have to call Transgo about that.

Import Hater · July 31, 2003

I hope that it isn't a problem. Last thing I'd want to do is put a $100 kit on (no labor charge...obviously), have it interfere with my stock PCM calibration...then have to spend several hundreds more for a Predator or LS1Edit just to make it work.

Rob