Transfer Case??? 231D to 231 HD -

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2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Transfer Case??? 231D to 231 HD

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Old 06-20-2011, 08:30 PM
TwistedCage TwistedCage is offline
Join Date: Nov 2010
Vehicle: 2001 Dodge Ram 1500 Sport 4x4 5.9L 360ci
Location: Florida
Posts: 89
Red face Transfer Case??? 231D to 231 HD

2001 Dode ram 1500 Sport qud cab short bed 4x4 auto transmission. now to the point I got my build sheet from dodge and it said that my truck was built with
ADAP Light Group
ADJ Heavy Duty Service Group
AGG Sport Group
DGT 4-Spd. Automatic 46RE Transmission
DHAP Lock-Up Torque Converter
DHKS Shift-on-the-Fly,231HD Transfer Case
NMCP Heavy Duty Engine Cooling
SFBS Front Heavy Duty Shock Absorbers
SGBS Rear Heavy Duty Shock Absorbers

but when i went under my truck my trans case says 231 D.I was woundering if i could just buy a 231 hd and just bolt it up with no problems or is there a stronger trans case that would fit with none or little moding. Oh and does all that heavy duty mean i have a heavy duty truck? or how can i find out if it is HD or not?
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2001 Dodge Ram 1500 Sport 4x4 Quad cab 5.9L V8 360 ci 3.92 gears LT265/75/16E 46re transmissinon 231D transfercase 9 1/4 rear dana 44 in the front 210,00 miles
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Old 06-20-2011, 11:44 PM
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HeyYou HeyYou is offline
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Join Date: Apr 2010
Vehicle: 1996 Dodge Ram 2500
Location: Adrian, MI
Posts: 35,478

Being a heavy duty just means it is more capable, it doesn't give it any additional tow rating, or load carrying capacity that I am aware of. (of course, I may be missing something to0.....)

Its possible the original t-case crapped out, and that was what they put in there. The tag should read 231DHD....... If you can find one of the HD units, it should be a direct bolt in.

Of course, the 241 would bolt right up as well, to the trans anyway.... but, rear output shaft is different spline count/diameter... I think, and the front shaft uses larger u-joints.... not sure if the flange is larger or not.
1996 Ram 2500 5.9 EC/SB Gas, Auto, 4x4, Hughes plenum plate, Kegger mod, double roller timing set, rest is stock. For now.....
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Old 06-20-2011, 11:44 PM

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