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Unread 05-04-2013, 06:26 PM   #1
spottedfrog
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1979 CJ5 
 
Join Date: Sep 2010
Location: Grand Junction, Colorado
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Axle delima.

So while waiting on the machinist to get done with my new engine, I'm pondering my next step.

I want 33s. I've got NTs with 3.54 gearing, Moser 1 piece in the rear. If I go to lower gears in these I have to replace the carriers.
I want to go with wider axles in the future.

I'm wondering how much of a dog off road my CJ will be with 33s & 3.54. I'd be running this set up along with a T176 & D300/Lowmax 4:1.

Is it worth re-gearing my NTs while I wait to upgrade? I have no idea how long it will be before I can upgrade axles.

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Unread 05-04-2013, 06:35 PM   #2
skizriz
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Put it in low range, and you will be fine. Unless you are doing some serious rock crawling.
I don't have a super low low range,and often find myself kicking my auto up into second because low is simply too slow. That's with 3.54's and 35" tires.

Wait on the upgrade IMHO. You are in the same pickle as I am. Looking for axles, and not wanting to put anything into the old ones.
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Unread 05-04-2013, 06:38 PM   #3
jp360cj
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I had 33s and 3.54s with a T150/D20 and it wasn't too bad with a with worn out 258. Worked pretty well with the 360, but the 3.73s were better.

That being said, with a fresh engine and the gearing of your Trans/t case, I would wait to upgrade axles to regear. It at the very least see how it performs then go from there
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77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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Unread 05-04-2013, 06:55 PM   #4
spottedfrog
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I'll probably Do 33x12.5, and run spacers. and see how it does.
I just really am disgusted with the T150/D20, and thats on 31x10.5s!
My experience with the old/current combo has me gun-shy about jumping to 33s.
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Unread 05-04-2013, 07:42 PM   #5
TIPPEDITOVER
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I run 33's with 3.54 axle gears. Great combo for the highway speeds. I have a sm420/Dana 300 with 4:1 low-range. Works outstanding. Low range is so low I often have to use 3rd gear to keep up with the pack.

Now I'm switching axles. Gears are going to 3.73 and using 36" tires.
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Unread 05-04-2013, 08:00 PM   #6
spottedfrog
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TIPPEDITOVER, That SM probably helps allot on the trail.

T176 Gearing 3.52, 2.27, 1.46, 1

SM420 7, 3.6, 1.7, 1

I think the T176/ D300 4:1 will be an awesome combo as long as I have the correct axle ratio.

Compared to my old crappy T150/D20 combo, even on 31s this combo annoys me...a lot

D20: 2:1
T150 2.99, 1.75, 1
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Unread 05-05-2013, 10:03 AM   #7
TIPPEDITOVER
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I rarely use 1st gear on the trail. It's too low with the 4:1 in the t-case. 2nd gear works great for most of the difficult stuff. 3/4 of the time I'm using 3rd gear so I don't get left behind.

My opinion is to keep the 3.54 gears in the axle so you don't loose top end speed, but if it's just a trail rig, then who cares I guess.

4:1 low range will work great for the combo you are planning to run with 3.54 axle gears and 33's.

I know what you mean about the t150/d20 combo. I yanked those out within one month of owning my jeep. They were not going to cut it on the trails around here, in stock form. However in hind sight I think with a 3:15 gear-set in the d20 it would have been fine and I could have saved a boat load of time and money.
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