Atlas 3.8 Or 4.3 Or Tera Low 4.0?

[NAILER341]

well, the decision is made... anyone else looking for an atlas, let me know. i have negociated a grat price on a 5.0 with the upgraded output shaft. the order will be processed in the next couple of days, and i should have it well before christmas

[JeepGal]

Originally posted by NAILER341
Well, the decision is made... anyone else looking for an Atlas, let me know. I have negotiated a great price on a 5.0 with the upgraded output shaft. The order will be processed in the next couple of days, and I should have it well before Christmas

CONGRATS ERIK!

Thats awesome

Tam

[NAILER341]

thanks, tam! i cant wait to get it do you need one?
really, any one else in the market for one of these... let me know. i am very sure i got the best deal available on one of these.
serious inquiries only

[goodtimes]

Originally posted by NAILER341
well, the decision is made... anyone else looking for an atlas, let me know. i have negociated a grat price on a 5.0 with the upgraded output shaft. the order will be processed in the next couple of days, and i should have it well before christmas

Nice!!! You're gonna love it when you get it installed!

[PondScum]

Congrats on the Atlas!


Myself i'm going to go with 4 to 1 kit.

As far as the 2-lo:

This is useful when you're trying to make a sharp corner while crawling along in low range. You can shift on the fly to 2-lo, go around the corner and shift on the fly back into 4-lo.

Crawl Ratio:


For the Crawl Ratio (forward and reverse) you would care if you four wheel in rocky, steep terrain. The slower you can go over jagged, bumpy areas, the more likely you will get past without damaging your vehicle. Crawl "movement" is calculated at 750 RPM and is measured in Feet Per Second.

Everyone should be concerned with the Highway Speed results, unless you trailer your four wheeler wherever you go. This computes what speed you would be traveling at with the transmission, final drive ratio and tire size of your choice. Highway speed is calculated at 2000 RPM and is measured in Miles Per Hour.

When all is said and done i'm shooting for a 70:1 ratio with my Jeep.

check tommyjeep.com for info i'm going with his set-up, or at least trying to.

[goodtimes]

Originally posted by PondScum
....When all is said and done i'm shooting for a 70:1 ratio with my Jeep.

Just wondering, have you ever wheeled with anything with that approximate crawl ratio? I am at 66:1, and find it a bit on the high side. I went from ~34:1 (with a automatic) to 66:1 (manual) and loved it, for about 6 months. Then I started finding myself wishing I was closer to 100:1. The more I wheel it, the more I wish the gearing was deeper. Whenever I wear out the 31's, I'm really gonna be whining for the deeper gears.

Point being, make sure that the 70:1 is deep enough for you. It would suck to get it all set up and then find out you want to do another gear swap.

[NAILER341]

according to chris, with the 4.88 gears, atlas 5.0, and 4.88 gears i am around 96 to 1
i think that is what he said.... i dont know the formula.

[Dukes69]

Originally posted by NAILER341
according to chris, with the 4.88 gears, atlas 5.0, and 4.88 gears i am around 96 to 1
i think that is what he said.... i dont know the formula.

1st gear x t-case low range x gear ratio = final ratio

[Guest]

I wouldn't use an Atlas or Tera-low's gears. If and when my Dana-18 ever grenades I'm going to replace it with one of Jack O'Brian's Rock-Eater Dana-18/20 hybrids. They are extremely strong, you get twin sticks, you can get gearing as low as 4.1 to 1 (I would more than likely shoot for something in the 2.72 to 1 range; yeilding a final crawl ratio of 93.5 to 1), and I can retain the use of my Warn overdrive unit. They run somewhere in the neighborhood of $2,000 with case exchange. O'Brian is a retired NASA engineer that has wheeled his entire life, and decided some years ago to build a better Dana-18. He's redesigned the bearings in them as well to reduce the whine that they characteristically emit at roadway speeds. Old-school Bronco guys have been using them for years with no complaints...

[jt_jeep]

Nailer...
If I'm not mistaken you have 4.0L engine that mean you have ax 15. Its first gear is 3.83.
if you're using 5.0:1 and 4.88
your final ratio will be 3.83 x 5 x 4.88 = 93.5 to 1

[PondScum]

If you have an Atlas II 5.0:1, AX-15, and 4.88 gears:

Your transmission's lowest gear ratio is 3.83 : 1
Your transmission's highest gear ratio is 0.79 : 1
Your transmission's reverse gear ratio is 4.22 : 1

Forward Crawl Ratio: 93.452 to 1

[PondScum]

Originally posted by goodtimes
Just wondering, have you ever wheeled with anything with that approximate crawl ratio? I am at 66:1, and find it a bit on the high side. I went from ~34:1 (with a automatic) to 66:1 (manual) and loved it, for about 6 months. Then I started finding myself wishing I was closer to 100:1. The more I wheel it, the more I wish the gearing was deeper. Whenever I wear out the 31's, I'm really gonna be whining for the deeper gears.

Point being, make sure that the 70:1 is deep enough for you. It would suck to get it all set up and then find out you want to do another gear swap.

For the amount of wheeling i do and the land i wheel on 70:1 will work fine for me. I do have a buddy who is at 70:1 and i have wheeled with his Jeep, this is what i have based my build on.


Things of course could change, they seem to always do, but for now 70:1 is my goal.

[goodtimes]

Originally posted by PondScum
For the amount of wheeling i do and the land i wheel on 70:1 will work fine for me. I do have a buddy who is at 70:1 and i have wheeled with his Jeep, this is what i have based my build on.


Things of course could change, they seem to always do, but for now 70:1 is my goal.

Good deal. It is nice to have someone with a setup similar to what you want, that way you can get a better feel for how it will perform.

Personally, 250:1 is my goal (not in the heep--wheelbase is too short).