And now that I've got some miles on it, an update on how it drives with the upgrades I listed in the first post, minus the Sonnax 2nd and 4th until I get them installed, but with a corvette servo currently.

First off, everybody wants to know about the shifts, are they too soft, too firm, etc. I notice that when I drive around town, the shifts are still fairly light. A little firmer than stock. But when I put some lead down the 1-2 and 2-3 shifts feel like a manual car, with their level of firmness. Nothing harsh, just lets you feel the shift. Don't really notice the 3-4 shift other than seeing the rpm's fluctuate briefly. I can feel it a little if I'm giving it a lot of gas.

I notice a big bump in how fast my truck accelerates and also that the acceleration is faster at lower rpm's than previously, which I would hazard a guess has something to do with more efficient energy transfer from the engine to the rear wheels via the upgraded transmission and torque converter. That's just my inexperienced guess.

I also notice that when I take my foot off the gas, the speed doesn't drop nearly as fast at it did previously when I would coast to say, a red stop light.

Supposedly things like turbulator steels increase gas mileage. I imagine all the other stuff helps too to make the transmission more efficient. But I can't imagine an increase big enough to really be noticeable. I haven't driven anywhere near enough to say though, so we'll see.

All in all, I'm very happy with my transmission rebuild and torque converter. It just drives really, really well. And I won a bet I had with one of my friends. He bet that my rebuild wouldn't be successful and that I was crazy. And since he lost, he has to throw a "transmission rebuild party" in my honor. There will be cigars and much Bordeaux.

 

I've passed the 30,000 mile marker for this rebuild and still going strong. Thanks again to everybody who contributed, especially Ted aka mrvedit!

 

Glad to hear that your trans is holding up well.
And mucho thanks for all the help you provide on this forum!

 

Hi mrvedit...wondering if you meant the forward sprag or forward spring in post #23. I'm in the middle of a 4l60e rebuild and wondered if I might have missed something. I've installed the sprag properly, but I'm unsure about a spring. Jake

 

He's talking about the sprag. They can go in two ways but only the proper direction will give you a working transmission.


Glad my rebuild thread is helping you with your rebuild.

 

Thanks for pointing out the typo in post #23; I corrected it to "sprag" as Cory stated. Sorry for any confusion.

 

50,000 miles and still going strong!