400 trans, 205 & 203 range box. opinions please - Pirate4x4.Com : 4x4 and Off-Road Forum

GAguy · 02-05-2008, 05:00 AM

Ok, I have read a lot of info about the 205,203,400 doubler setup. I would like opinions from those who use this setup.

Is $700 worth adding the 203 range box to 400/205 in a trail truck. How does this combo perform compared to a stock 700r4 and 241 c transfer case. Does fuel mileage decrease and is there power loss from running the heavyer parts.

Does the weight affect the frame over time? Is the shifting a pain in the ass and does maintance requirement go up or down compared to stock?

And lastly would you still use this setup or have done something different? Such as just using the 400 and 205 or even a lomax kit?

Thanks,

Gaguy

1990 K5
14 b, d60, 5.38s
43" 14.5 x 20 mich. xl's, 7" lift
stock 700r4 with 241c
hydro assist steering

florida4x4 · 02-05-2008, 05:13 AM

depends on what you mean by trail truck. if you're going to need a crawl ratio then there is no substitute.

Why not run it with the 241? The low range is better than a 205 and as long as you protect it from hitting the rocks it will hold up. $700 is cheap, $525 is even cheaper (jed's machine). Don't forget that you'll have to modify you're driveshafts and make a new trans mount...

tacoma73 · 02-05-2008, 08:39 AM

The "extra weight" will not affect the frame: the 203 box is like 50lbs or something.

Doubling to a 241 would be pretty sweet... I'm going to think abou that one. 2.72:1 vs 1.96:1 in the 205.... so you'd have a better low to start with and even lower Low-Low. Hmmmm

Gearhead 1990 · 02-05-2008, 09:01 AM

If you want ultimate gearing, put in a 4:1 klune between the 700r4 and 241.

That will give you 3 low range ratios, 2.72, 4.0, and 10.88!

That will make your crawl ratios, 44.63, 65.64, and 178.53!

Tim84K10 · 02-05-2008, 10:34 AM

A 241 cannot be used in a doubler with a 205. The shift rails will hit the adapter.

Red Chevy · 02-05-2008, 09:19 PM

I did see on here were a guy was able to modify the 205 rails and shift it from behind. Just a thought.

02-05-2008, 05:00 AM	#1 (permalink)
GAguy Registered User Join Date: Dec 2007 Member # 105288 Posts: 43	400 trans, 205 & 203 range box. opinions please Ok, I have read a lot of info about the 205,203,400 doubler setup. I would like opinions from those who use this setup. Is $700 worth adding the 203 range box to 400/205 in a trail truck. How does this combo perform compared to a stock 700r4 and 241 c transfer case. Does fuel mileage decrease and is there power loss from running the heavyer parts. Does the weight affect the frame over time? Is the shifting a pain in the ass and does maintance requirement go up or down compared to stock? And lastly would you still use this setup or have done something different? Such as just using the 400 and 205 or even a lomax kit? Thanks, Gaguy 1990 K5 14 b, d60, 5.38s 43" 14.5 x 20 mich. xl's, 7" lift stock 700r4 with 241c hydro assist steering

02-05-2008, 05:13 AM	#2 (permalink)
florida4x4 Beaver Pleaser Join Date: Sep 2002 Member # 13645 Location: home of the wayward dirt bike Posts: 1,421 Blog Entries: 1	depends on what you mean by trail truck. if you're going to need a crawl ratio then there is no substitute. Why not run it with the 241? The low range is better than a 205 and as long as you protect it from hitting the rocks it will hold up. $700 is cheap, $525 is even cheaper (jed's machine). Don't forget that you'll have to modify you're driveshafts and make a new trans mount... __________________ 1972 GMC Submarine 383 / TH350 / 203D-NP205 / D60 / 14FF / 42's on Stazworks / heavy foote / four eyez Inclined to brute force attack a 70* incline with a Quadrajet 1997 GMC K3500 Suburban Turbo 5.3 in the works / 4L80E / HP60 SAS / PROJECT TOWHOE

02-05-2008, 08:39 AM	#3 (permalink)
tacoma73 be cool, baby Join Date: Mar 2003 Member # 17896 Location: tooele UT Posts: 3,048	The "extra weight" will not affect the frame: the 203 box is like 50lbs or something. Doubling to a 241 would be pretty sweet... I'm going to think abou that one. 2.72:1 vs 1.96:1 in the 205.... so you'd have a better low to start with and even lower Low-Low. Hmmmm __________________ Utah 4-Wheel Drive Association---Blue Ribbon Coalition---USA-ALL---Tread Lightly

02-05-2008, 09:01 AM	#4 (permalink)
Gearhead 1990 Registered User Join Date: Feb 2007 Member # 87457 Location: Sandpoint, Id Posts: 488	If you want ultimate gearing, put in a 4:1 klune between the 700r4 and 241. That will give you 3 low range ratios, 2.72, 4.0, and 10.88! That will make your crawl ratios, 44.63, 65.64, and 178.53! __________________ 2000 Yukon Denali hidden inside a 1997 Yukon body :D SAS, hp d44, 14ff, 5.13s, 38s.....

02-05-2008, 09:19 PM	#6 (permalink)
Red Chevy Oilfield Trash Join Date: Jan 2006 Member # 64526 Location: Many, Louisiana Posts: 1,511	I did see on here were a guy was able to modify the 205 rails and shift it from behind. Just a thought. __________________ '91 k3500, 454, 4speed, 42" R-1's no lift '97 z-71, 3" BL, 38" tsl radial, 454/th400 '97 tj, 2.5/auto, rubi 44/5.13/spartan, 8.8/5.13/spool, 34/10.50/16 ltb

02-05-2008, 10:34 AM	#5 (permalink)
Tim84K10 Banned Join Date: Nov 2003 Member # 24704 Location: Illinois Posts: 4,430	A 241 cannot be used in a doubler with a 205. The shift rails will hit the adapter.

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