heavy-duty transfer case

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What, exactly is different about the "shift on the fly" transfer case? From the std transfer case? I'm getting different interpretations...
Gracias!

 

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--in the "enlightened" times in which we live, "shift on the fly" IS the standard for the newer T-case designs----just a few short years ago, there were trucks put out with T-cases that were somewhat primitive in that they were to be shifted from 2H to 4H and back, either at the halt or on the just barely crawl... . the NP205 was one of those... Cast-Iron (ooohhhh yeaaaaah), gear-driven (whirrrrrrRRRrrrrrRRRRR), and virtually indestructible(hho-hho-hho), but, sadly, not suitable for wives and sudden encounters with less-than-optimal driving surfaces--4WD w/ a '205 required some advance warning, and I guess Detroit just doesn't think we're up to it anymore----I don't know of a non-shift-on-fly tcase available by anyone at the present time----4L does remain "shift at the halt, or at the crawl"----happy front-draggin'----rich

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98 12-valve qc2500 4x4/kill-switch, K&N,silencer ring hanging in garage,600amp quick-connect jumper cables, 4"straight-thru w/nasty 5" chrome slant-cut outlet,PrimeLoc,Warn Front receiver, 19. 5"Ricksons w/Goodyear Unisteel "UPS Truck" tires, camper shell, Westin step-rail/nerf bars, diamond-plate rail caps, bedliner,ATF dipstick bungee(modified porky system),Tazmanian Devil mudflaps and floormats--"%$*#)%$^#"-(translation:"TAZ LIKE DIESEL")

 

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The transfer case on the 4x4s come standard with the shift on the fly. The H/D transfer case has the side cover for adding a PTO. Someone correct me if Im wrong.

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1999 2500 Cummins w/4spd auto,Quad Cab,SWB,4x4,Flame red ,all options less leather and radio controls on steering wheel,OEM color matched runningboards,DeeZee bedrails painted black,Power Vision Mirrors,OEM ventshades,Oem sill covers,OEM underrail bedliner

 

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MB-- that sounds right, but the little voice in my head (the one with the horn rims and pocket protector) is telling me that the HD difference having to do w/ PTO access is on the transmission, not the Tcase---sometimes the other voices make him go look it up----BTW here's a bit of "food for thought"... Years ago, my dad worked for a winch manufacturer that mf'd a winch (for WARN to label and market, I think) and an absolutely(mech and engineering) identical winch directly to an end-user client----the only differences were:

1. yellow paint, as opposed to gray or green
2. the presence or absence of the sacred "HD" in the name
3. $1000. 00

always look and see side-by-side (when possible) the difference between "stock" and "heavy-duty"... . sometimes the stock IS already HD, but just isn't bragging about it... sometimes there really is a difference to be taken advantage of----now, if I'd remember to look in the owner's manual about the pto port's location----rm

 

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The HD transfer case not only has the provision for the PTO, it will also take more input torque... 1400 lbs. ft. as opposed to the standard transfer case which is rated at (if I remember correctly) 1028 lbs. ft. A (one row) wider and heavier-duty drive chain and corresponding parts are the upgraded components on the HD transfer case. Best "$100. " you can spend.

Reference DAVE Fritz's Ram Site which can be accessed through a link on the "Links" page.

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'98. 5 2500 QC 4x4, (Black) SLT Sport, personalized license plate: BLCKOUT, ISB, LWB, 3. 54 LSD, A/T, 275 hp. injectors, Glasstite Vision II "canopy", Line-X bed liner, 285/75R16 BFG A/Ts on 16x8 M/T Challengers, Warn 4X Boards, Mopar fender flares, front and rear NW Custom stainless steel/rubber mud flaps, Mag-Hytec diff. cover and trans. pan, Edelbrock IAS shocks, VDO Vision gauges, PIAA Dual Sport 900 auxiliary lights and Super White bulbs, BD exhaust brake and TorqLoc, Prime-Loc fuel filter relocation kit, and Banks 3. 5" dia. exhaust.
COMING ATTRACTIONS: Banks (ISB) Stinger 4" dia. stainless steel exhaust system!

SVP of BOMB! heh,heh,heh

 

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I have to go with John on this one since I remember on the CDW site that someone posted that the HD T-Case had a 3 row chain instead on the std. 2 row and that the HD was PTO ready. I ordered with HD T-Case since I wanted to run a PTO off the T-Case and utilize the Trans for speed selection. The HD part doesn't do much for since most of my 4 wheeln' is around town on the 3 or 4 snow days and the occasional wood getting weekends. BTW aren't all the 5sp PTO ready?

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99 2500, QC, SLT, 4x4 ISB, 5sp, 3. 55sld, Infiniti am/fm/cd, HDTcase, NW Running Boards and Mud flaps, Draw-Tite Front Mount Receiver Hitch, Tekonsha Brake Control, SRW and Husky Liners.

 

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The major difference is that the HD case uses SIX planetary gears in the LOW range carrier as opposed to only THREE as on the LD case (carrier is the same, they just left out every other gear). Also, the HD does have a PTO pad which the LD does not (BTW, the six speed transmission has TWO PTO pads, one on each side). Don't know about the chain, I suspect it is the same.

Six gears provide the extra torque necessary to drive the PTO pump for snow plow ops, etc. For us "non-snow powing" folks, three gears is just fine and they are only used when you shift into 4L. In 4H or 2H the two cases function the same and have essentially the same rating (although the chain may be different).
Ron.

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'00 2500, 4x4, QC, Cummins ETC/6spd, 3. 54, Camper, Trailer, SLT, 4ABS, BD E-brake, Pullrite 20. 5K 5th hitch, Tekonsha Envoy-SX Tbrake, Flame Red/Silver, Agate