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Discussion Starter #1
I hadn't done the math on triple cases, compared to crawler-geared double cases. Here are the basic numbers....
* Two transfer cases, one with AA Trail Tamer gears, the other with stock low range: 1:1, 2.28, 4.0:1, 9.12:1
* Two transfer cases, one with Marlin gears, the other with stock low range: 1:1, 2.28, 4.7:1, 10.72:1
* Three transfer case ratios with stock low ranges: 1:1, 2.28:1, 5.20:1, 11.85:1

Basically, all three get you obscenely low, but the triple case nets you bragging rights.

Everything else depends on the gearing you have between the transfer case and the engine -- basically, what transmission gears you'll use to split ratios between these (effectively) four-speed transfer cases. On my truck, the Marlin makes most sense, for more adjustment *between* gears... there's more gears that better spread the 20 various speeds. YMMV, I guess...

Randii

[ 09-28-2001: Message edited by: randii ]
 

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Discussion Starter #2
I think the ULTIMATE (yeah, I know that word is overused) combination would be a 2.28, 4:1, and a 4.7:1 combination... but I'll never pay for that.

With 4.55 gears and a turbo transmission, you'd have 840.5:1, and 35 incremental forward speeds... and I'd need a PC to shift them. <IMG SRC="smilies/rolleyes.gif" border="0">

Unimogs use these sort of combinations so that they can plow fields at constant speeds... guess I'll stick to 210:1 for now and only 20 forward speeds. <IMG SRC="smilies/biggrin.gif" border="0"> Haven't found a need for more gears yet, and with something other than a 4-banger, I might even have a wide enough rev range not to HAVE to use all 20 gears! <IMG SRC="smilies/rolleyes.gif" border="0">

Randii
 

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Discussion Starter #3
I guess what I'm saying is that I had previously thought triple cases were pretty silly, but I guess they are no sillier than the double case I curretnly run, with Marlin 4.7:1's stuffed in the back case.

I do get a 6" longer driveshaft outta the deal, tho... and a little less drivetrain friction loss... and one fewer sticks. Tradeoffs, tradeoffs. <IMG SRC="smilies/biggrin.gif" border="0">

Randii
 

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I say they're silly... And I think this post is silly <IMG SRC="smilies/tongue.gif" border="0">

Stop crunching numbers and drive - I have enough trouble juggling the 3 shifters in the cab already <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
 

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I agree with DRM (oh god, did I just say that <IMG SRC="smilies/biggrin.gif" border="0"> ).
If you've never driven a truck with dual cases with 4.0 or greater gears in the rear case, it's more than enough gear. It's too slow sometimes, which leads to a lot of shifting. Dual cases with stock gears are nice, but dual cases with AA or Marlin gears in the rear are the best setup IMO for crawling. I'm 190:1 and it's really rare I stall it. Dual case guys at like 108:1 stall quite a bit more, but it's still a hell of an improvement over stock. I think the smartest monetary setup out there is to do the AA gears in the stock case first. Then do dual cases after you have enough for the adapter and driveshaft mods.
 

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Originally posted by Southern Snipe Hunting Guide:
<STRONG>I say they're silly... And I think this post is silly <IMG SRC="smilies/tongue.gif" border="0">

Stop crunching numbers and drive - I have enough trouble juggling the 3 shifters in the cab already <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"></STRONG>
Every once in a while I forget what position the shifters are supposed to be in. Most of the time we run with the front case in high and the rear case in low which puts me in the 4:70's just what I had before I went dual. But it sure is nice to slip the front case into low also and be a an obsecene 205-to -1 . It take all the way to forth gear to bring the speedo off the peg!!!!! <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/usa.gif" border="0"> <IMG SRC="smilies/usa.gif" border="0">
 

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The doubler with marlin rear set would be 10.716:1 not 9.4:1 which is the way I'd go. I've got the doubler now and a spare T-case so I could go cheaper and go triple. But like I said on the other thread, Marlin and others recommend you put the crawler gear set in the rear case so your not multipling the torque input into the case, the triple setup would be the same effect as putting the crawler setup in the front case. Worse even, as it would be a 5.2:1 input ratio. Thats one reason I'm also reconsidering the possibility of putting a SM465 in front of my doubler. Too much is not always better.
 

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Originally posted by BrianR:
<STRONG>Thats one reason I'm also reconsidering the possibility of putting a SM465 in front of my doubler. Too much is not always better.</STRONG>
If U want a lower 1st, Marlin also sells gear kits for the trannys, check his website out, it's $$$$$$$ though
<IMG SRC="smilies/eek.gif" border="0"> <IMG SRC="smilies/eek.gif" border="0"> <IMG SRC="smilies/eek.gif" border="0">
 

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Discussion Starter #9
Stop crunching numbers and drive
Says the guys who's been talking about rebuilding his truck for as long as I've ever known him. <IMG SRC="smilies/rolleyes.gif" border="0">

I blew my motor out in June, and have still managed to ride-along with someone else at least once a month... even without a functioning 4x4.

Randii
 

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Discussion Starter #10
The doubler with marlin rear set would be 10.716:1 not 9.4:1...
Good eye. I knew that looked wrong. Correction made.

Too much is not always better.
Also true!

Randii
 

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Discussion Starter #11
Stop crunching numbers and drive
Guess I'm a little sensitive to this -- I sure wanna get it driving, but time is not allowing. <IMG SRC="smilies/frown.gif" border="0">

Kudos to all of you out there who *ARE* wheeling...

Randii
 

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Marlins truck has three cases, two with 4.7 gear sets. Just for the sake of convertion.[

QUOTE]Originally posted by BrianR:
<STRONG>The doubler with marlin rear set would be 10.716:1 not 9.4:1 which is the way I'd go. I've got the doubler now and a spare T-case so I could go cheaper and go triple. But like I said on the other thread, Marlin and others recommend you put the crawler gear set in the rear case so your not multipling the torque input into the case, the triple setup would be the same effect as putting the crawler setup in the front case. Worse even, as it would be a 5.2:1 input ratio. Thats one reason I'm also reconsidering the possibility of putting a SM465 in front of my doubler. Too much is not always better.</STRONG>[/QUOTE]

<IMG SRC="smilies/smile.gif" border="0">
 

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Yah, but are his 4.7's stronger than the stock 2.28's so they can take the torque better. <IMG SRC="smilies/confused.gif" border="0">
 

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I've been breakin' stuff at 108:1, and have wondered if you would have More or Less breakage at higher gear ratios. At 108:1 I still have to use more throttle than I'd like to climb over big stuff. I was surprised to find that in reality 108:1 is NOT that low!! It still does not perform as well in some situations as my old '70 GMC w/ a 330hp 350, turbo350, 205NP t'case. The auto still has better variable torque for crawling.
 

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Originally posted by CALTOW:
<STRONG>something tells me that Marlin runs with 23 spline transfercases... he doesn't recomend using 4.7's in the first case unless you have the 23 spline so......</STRONG>
so.......................... <IMG SRC="smilies/biggrin.gif" border="0">
<IMG SRC="smilies/clown.gif" border="0"> <IMG SRC="smilies/clown.gif" border="0"> <IMG SRC="smilies/jester.gif" border="0"> <IMG SRC="smilies/rasta.gif" border="0">
 

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one thing not being mentioned is increased slop with 3 cases(or "backlash"). you'll notice with a dual case that there is more drivetrain slop than a single case toy. therefore, triple cases give a little more. i am 190:1, and its sweet. btw, i notice some of this slop, but it has never been a problem for me-----brad
see ya in moab seabass---
 

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Originally posted by CALTOW:
<STRONG>
Originally posted by SeaBass44:
[QB]so.......................... <IMG SRC="smilies/biggrin.gif" border="0">

so.... maybe he has 23 spline... what else what I mean?? I'm just guessing though... I've never talked to the guy before....I'd go triple anyway... these toy cases are very strong and I wouldn't be worried about them busting up</STRONG>
So...........I'm givin ya a hard time <IMG SRC="smilies/biggrin.gif" border="0">
 
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