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Unread 10-09-2003, 01:47 PM   #1
NJCJ7
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stupid question?

I've been told there are no stupid questions, i hope that applies here.

Anyway, i don't have to get out and lock hubs or anything in my 85 to engage 4wd do I? Just move the shift lever into desired position and go? I am assuming i should be stopped though when i do this? If someone wants to run down the procedure real quick that would be cool...

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[color=blue][b]1985 CJ7[/color][/b] MC2100,TFI, 2.5" BDS suspension, Full Cage, 31" Mud Tires, 1/2" MORE shackles, Aussie Locked AMC 20
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Unread 10-09-2003, 02:55 PM   #2
390fastback
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An 85, I beleive you will need to get out and lock the hubs. You could just engage the transfer case, but your wheels would still just be along for the ride. To engage it, lock the hubs (mine stay locked most of the time) and pull the stick back to 4H. You can still be moving, though not really fast, to engage 4 high. I would suggest no more that a few miles an hour (read:no more than 5). I don't know the shift on the fly spec with dana 300's. To hit 4 low though you do need to stop.
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Unread 10-09-2003, 04:21 PM   #3
johny1i
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Quote:
Originally Posted by 390fastback
lock the hubs (mine stay locked most of the time)
Do you notice a drop in gas mileage with the hubs locked in 2WD? Mine seems more sluggish, but maybe it's just psychological.
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Unread 10-09-2003, 08:36 PM   #4
wm69
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Think of it this way, when you engage the lever on your transfer case the front drive shaft spins, so the front axles spin. If you do this without locking the hubs in, the axles aren't "connected" to the wheels; the front axles are spinning, but they aren't driving the wheels. When you lock the hubs in, it connects the wheels to the axles.
If you are driving with the hubs locked in 4wd and the tcase in 2 wd, the front axles are still spinning if the jeep is rolling, cause the axles are "connected" to the wheels. When the wheels spin, it casues the axles to spin, but the front driveshaft is not connected to the engine cause the tcase isn't engaged. Hope I didn't confuse you more.
To simply answer your question, yes you have to lock your hubs AND put the tcase in 4wd to put it in 4wd. Newer jeeps don't requre this cause they have "automatic" hubs. These are nice, but are considered less reliable.
In the late 70's CJ7's I have seen some hubs that automatically lock for light mud, and then you lock them in like regular hubs for heavy mudding/ towing. Seemed weird to me, but they worked good (were on a buddies jeep).
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Unread 10-10-2003, 07:01 AM   #5
NJCJ7
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Okay, so i have to lock the hubs. Is it okay, as someone said, to drive around with the hubs locked all the time? Also, how do i actually do this? Thanks for all the great info, guys.
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[color=blue][b]1985 CJ7[/color][/b] MC2100,TFI, 2.5" BDS suspension, Full Cage, 31" Mud Tires, 1/2" MORE shackles, Aussie Locked AMC 20
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Unread 10-10-2003, 07:21 AM   #6
fuzz401
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some say yes some say no if you read the manual for the jeep it tells you to do it each month to lube the rear up i have locked my hubs in for months at a time and never have had any problems at all with it
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Unread 10-10-2003, 07:43 AM   #7
390fastback
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Quote:
Originally Posted by johny1i
Do you notice a drop in gas mileage with the hubs locked in 2WD? Mine seems more sluggish, but maybe it's just psychological.
Come winter time, the hubs are locked all the time. Just easier when I get stuck. Done that on every 4wheel drive I've ever had. Noticed a small drop in milage but not really significant.
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Unread 10-10-2003, 07:53 AM   #8
wm69
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Quote:
Originally Posted by 390fastback
Come winter time, the hubs are locked all the time. Just easier when I get stuck. Done that on every 4wheel drive I've ever had. Noticed a small drop in milage but not really significant.
Right, it puts a little wear on your drivetrain components (up front), cause your front axles and driveshaft are turning all the time, and it will drag/ lower MPG a little (not even very noticable). I leave mine locked in if the weather is turning snowy/icy, or if I'm going from one muddy spot to another. I don't leave them locked in on the highway (if I'm not definately going into 4wd very soon) cause it's putting unneccesary wear on my front end. May not be a big deal, but here again, it may. Depends on whether you would rather be lazy or rebuild your front end a little sooner.... Not a big deal unless you plan on keeping your vehicle forever (which I do).
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85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT

85 CJ7 258, A/C, T176, MC2100, Team Rush, Warn XD8000i, superwinch hubs, 3in lift 31" BFG AT/KO

Last edited by wm69; 10-10-2003 at 07:55 AM..
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