- Thread starter
- #1,041
Ok….. and how is that 224:1 attained?I'm running an auto with a 224:1 final drive ratio.
Builds Reconstruction after rollover - building The Champ 2. (8 Viewers)
- Thread starter baldilocks
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NWF Black box
And underdrive w/ 5.29s
What trans? 5.29s? That's a deep first in an auto, even with the doubler
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- Thread starter
- #1,045
Yes, the black box is not a piece of Toyota factory hardware. I’m not sure where you are going with this.
Whether Toyota automatic or Toyota manual transmission, there is no way, that I know of, to get down to 120:1 and lower using an exclusively Toyota power train.
Whether Toyota automatic or Toyota manual transmission, there is no way, that I know of, to get down to 120:1 and lower using an exclusively Toyota power train.
- Thread starter
- #1,046
His black box is 2.72:1 in front of the hf2a which has the 3:12 low range gears.
Gearing other than 4.10s isn't Toyota either.
It's still a Toyota trans. I think it still counts.
It's still a Toyota trans. I think it still counts.
With 5.29s that still needs a ~5:1 first gear, right?
Either way, a Blackbox and A750 is on my long list. Carry on!
1.7 multiple in the converter before lockup.
The math is all in my build thread somewhere.
Oh, didnt think most people use the torque converter multiplier in their gearing calc.
Number of engine revolutions for number if axle revolutions.
Since you'll never get an auto to lock up that low, it seems legit. I just stole Slee's math.
It makes sense, but with decades of playing with this stuff I've never seen anyone calculate it that way.
- Thread starter
- #1,055
My entire point earlier today was that, as much as I appreciate manual transmissions, and agree that the auto box saps power, with an exclusively Toyota power train in an 80, for rock crawling, the slushy auto is preferred over a manual because the torque converter helps multiply torque and put power to the ground more controllably and usable.
Your transmission has less to do with your 224:1 than that black box.
I've seen it done both ways. The slower crowd seems to include the TC multiple more often. I used to calculate static ratio for years, but found it wasn't a good representation of the number of wheel revolutions i was getting at a given RPM.
The way it sits now, 1,000 RPM is about 4 wheel RPM. That data is more useful to me in the real world than what ever my static ratio is.
Agreed, and TBH i actually don't use low-low very often. It is nice to keep the rpm up for the steering though.
I leave the AC on all the time for this
The black box is sweet, I don't know of any other 80- LX that has one.
No mater the gearing I prefer a auto ! One foot on the break and one on the Gas for best control
Agreed. I like the control.No mater the gearing I prefer a auto ! One foot on the break and one on the Gas for best control
Going to have to upgrade the brakes though. Low-low overcomes them pretty easily, even just off idle.
- Thread starter
- #1,059
Time for a hydro booster.
I ditched my cruise control the day i got my 91. besides who needs cruise control when you have close to 100awhp on a 6800 lbs rig...lol
