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#1
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Unlock hubs in 94 Cherokee
I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
part-time 4WD tranny. The previous owner told me that you needed to back it up to unlock the hubs after having it in 4WD. I had to do this for my 88 Trooper. But I haven't seen anything in the Jeep owner's manual about backing up to unlock the hubs. Do I need to back to unlock hubs, or not? thanks, Tom |
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#2
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These hubs don't "unlock". That's unless you've added aftermarket hubs. The
backing up part is what you need to do if the shifter is stuck do to driving on a dry hard road and binding up the drive line. Earlier XJ's had a vacum operated unlock on the right axel but that was discontinued before yours was made (90 I think). JoBo > wrote in message ups.com... >I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > part-time 4WD tranny. The previous owner told me that you needed to > back it up to unlock the hubs after having it in 4WD. I had to do this > for my 88 Trooper. But I haven't seen anything in the Jeep owner's > manual about backing up to unlock the hubs. > > Do I need to back to unlock hubs, or not? > > thanks, > > Tom > |
#3
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You have permanently locked hubs, the previous owner obviously had no
clue how to use the 4x4. You can shift on the fly into and out of 4 high at any legal speed on a Jeep. I just treat 4 H like any other shift and when I see a snow patch coming, I shift in, get back to dry and just shift back to 2x4. When using 4 low for high torque and low speeds, you should be moving 2-3 mph only when shifting into or out of it or you will get bad noises. It clunks at the best of times going into low though. Even with the older vacuum axled hubs, you didn't have to back up to unlock them. You sometimes have to let off on the gas pedal fast to bump the vacuum up to get them to work, but that is just because of old age and leaky vacuum hoses. If the shifter will physically shift to 2 wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects the front driveshaft from the engine. On my 86 CJ7 with locking hubs, I sometimes have issues getting it out of 4x4 low. The shifter itself won't move sometimes unless I spin rubber or goose it in reverse. This only happens after coming off a too high a traction area just before wanting to use 2x4 again. So if the shifter won't move, you have to hit reverse sometimes or spin rubber, but the hubs don't care one way or the other. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's wrote: > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > part-time 4WD tranny. The previous owner told me that you needed to > back it up to unlock the hubs after having it in 4WD. I had to do this > for my 88 Trooper. But I haven't seen anything in the Jeep owner's > manual about backing up to unlock the hubs. > > Do I need to back to unlock hubs, or not? > > thanks, > > Tom |
#4
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My 96 xj has locking hubs, Oh by the way it is a warn conversion.
"Mike Romain" > wrote in message ... > You have permanently locked hubs, the previous owner obviously had no > clue how to use the 4x4. > > You can shift on the fly into and out of 4 high at any legal speed on a > Jeep. I just treat 4 H like any other shift and when I see a snow patch > coming, I shift in, get back to dry and just shift back to 2x4. > > When using 4 low for high torque and low speeds, you should be moving > 2-3 mph only when shifting into or out of it or you will get bad > noises. It clunks at the best of times going into low though. > > Even with the older vacuum axled hubs, you didn't have to back up to > unlock them. You sometimes have to let off on the gas pedal fast to > bump the vacuum up to get them to work, but that is just because of old > age and leaky vacuum hoses. If the shifter will physically shift to 2 > wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects > the front driveshaft from the engine. > > On my 86 CJ7 with locking hubs, I sometimes have issues getting it out > of 4x4 low. The shifter itself won't move sometimes unless I spin > rubber or goose it in reverse. This only happens after coming off a too > high a traction area just before wanting to use 2x4 again. > > So if the shifter won't move, you have to hit reverse sometimes or spin > rubber, but the hubs don't care one way or the other. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > wrote: >> >> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, >> part-time 4WD tranny. The previous owner told me that you needed to >> back it up to unlock the hubs after having it in 4WD. I had to do this >> for my 88 Trooper. But I haven't seen anything in the Jeep owner's >> manual about backing up to unlock the hubs. >> >> Do I need to back to unlock hubs, or not? >> >> thanks, >> >> Tom |
#5
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Your point?
Do locking hubs magically prevent you from shifting out of 4x4 like the OP was told? Mike The Fuzz wrote: > > My 96 xj has locking hubs, Oh by the way it is a warn conversion. > "Mike Romain" > wrote in message > ... > > You have permanently locked hubs, the previous owner obviously had no > > clue how to use the 4x4. > > > > You can shift on the fly into and out of 4 high at any legal speed on a > > Jeep. I just treat 4 H like any other shift and when I see a snow patch > > coming, I shift in, get back to dry and just shift back to 2x4. > > > > When using 4 low for high torque and low speeds, you should be moving > > 2-3 mph only when shifting into or out of it or you will get bad > > noises. It clunks at the best of times going into low though. > > > > Even with the older vacuum axled hubs, you didn't have to back up to > > unlock them. You sometimes have to let off on the gas pedal fast to > > bump the vacuum up to get them to work, but that is just because of old > > age and leaky vacuum hoses. If the shifter will physically shift to 2 > > wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects > > the front driveshaft from the engine. > > > > On my 86 CJ7 with locking hubs, I sometimes have issues getting it out > > of 4x4 low. The shifter itself won't move sometimes unless I spin > > rubber or goose it in reverse. This only happens after coming off a too > > high a traction area just before wanting to use 2x4 again. > > > > So if the shifter won't move, you have to hit reverse sometimes or spin > > rubber, but the hubs don't care one way or the other. > > > > Mike > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > > 88 Cherokee 235 BFG AT's > > > > wrote: > >> > >> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > >> part-time 4WD tranny. The previous owner told me that you needed to > >> back it up to unlock the hubs after having it in 4WD. I had to do this > >> for my 88 Trooper. But I haven't seen anything in the Jeep owner's > >> manual about backing up to unlock the hubs. > >> > >> Do I need to back to unlock hubs, or not? > >> > >> thanks, > >> > >> Tom |
#6
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The previous owner meant to back up while you are shifting out of
four wheel drive. A must with old Ford products as the the Dana and nine inch ratios don't exactly match, not as important with Jeeps, unless there is a tire size or pressure difference. But, it a good practice to get into. God Bless America, ßill O|||||||O http://www.billhughes.com/ wrote: > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > part-time 4WD tranny. The previous owner told me that you needed to > back it up to unlock the hubs after having it in 4WD. I had to do this > for my 88 Trooper. But I haven't seen anything in the Jeep owner's > manual about backing up to unlock the hubs. > > Do I need to back to unlock hubs, or not? > > thanks, > > Tom |
#7
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Crap Bill, I can just see someone doing 65 mph and in order to shift
having to stop on the highway and go backward against 70 mph traffic to shift to 2WD. LOL! Too funny.... Mike "L.W.(ßill) Hughes III" wrote: > > The previous owner meant to back up while you are shifting out of > four wheel drive. A must with old Ford products as the the Dana and nine > inch ratios don't exactly match, not as important with Jeeps, unless > there is a tire size or pressure difference. But, it a good practice to > get into. > God Bless America, ßill O|||||||O > http://www.billhughes.com/ > > wrote: > > > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > > part-time 4WD tranny. The previous owner told me that you needed to > > back it up to unlock the hubs after having it in 4WD. I had to do this > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's > > manual about backing up to unlock the hubs. > > > > Do I need to back to unlock hubs, or not? > > > > thanks, > > > > Tom |
#8
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The hubs lock through a vacuum mechanism. There is a collar of sorts that
slides over two splined shafts to connect them, this collar moves on command of a vacuum system. Sometimes the shafts and collar can bind, and going in reverse will release the bind and allow the collar to move back to its home position. This is not in the manual because it is not "required". It is helpful though. You can also release the binding, if present, by changing the load on the drive train, you can do this by letting off of the gas and turning the steering wheel from side to side. If you shift out of 4WD, and can hear the resulting clunk from the movement of the collar, then you do not have to do anything else. In theory, all you need do is shift out of 4WD, and eventually the vacuum system will pull the collar back to its home position. In practice, the collar can stick and the remedy is to try going backwards for a few feet. > wrote in message ups.com... > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > part-time 4WD tranny. The previous owner told me that you needed to > back it up to unlock the hubs after having it in 4WD. I had to do this > for my 88 Trooper. But I haven't seen anything in the Jeep owner's > manual about backing up to unlock the hubs. > > Do I need to back to unlock hubs, or not? > > thanks, > > Tom > |
#9
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He doesn't have a locking front end, it is on all the time.
Even with the old vacuum lock, shifting is by a lever on the floor. If this lever on the floor will shift to 2 wheel drive, you are freaking 'IN' 2 wheel drive no matter if the front axle is a vacuum release, permanent locked, or manually locked! There is no such thing as having to go into reverse to 'unlock' front hubs or axles period! That cannot happen on "ANY" Jeep! Once the shifter has moved to 2 wheel drive, the front driveshaft is no longer connected to the drivetrain, therefore there can be no 'binding up'. The older vacuum collar cannot 'bind up' when the driveshaft is not connected.... Now if your gear shift won't come out of 4x4, then yes, you do have to maybe back up to shift the transfer case. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Jeff Strickland wrote: > > The hubs lock through a vacuum mechanism. There is a collar of sorts that > slides over two splined shafts to connect them, this collar moves on command > of a vacuum system. Sometimes the shafts and collar can bind, and going in > reverse will release the bind and allow the collar to move back to its home > position. This is not in the manual because it is not "required". It is > helpful though. You can also release the binding, if present, by changing > the load on the drive train, you can do this by letting off of the gas and > turning the steering wheel from side to side. > > If you shift out of 4WD, and can hear the resulting clunk from the movement > of the collar, then you do not have to do anything else. In theory, all you > need do is shift out of 4WD, and eventually the vacuum system will pull the > collar back to its home position. In practice, the collar can stick and the > remedy is to try going backwards for a few feet. > > > wrote in message > ups.com... > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, > > part-time 4WD tranny. The previous owner told me that you needed to > > back it up to unlock the hubs after having it in 4WD. I had to do this > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's > > manual about backing up to unlock the hubs. > > > > Do I need to back to unlock hubs, or not? > > > > thanks, > > > > Tom > > |
#10
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Incorrect. You won't find the vacuum disconnect axle on a 1994 Cherokee.
Last model year for that was 1991 for XJ/MJ and 1995 for YJ. The hubs on a 94 Cherokee are permanently connected straight through the axles to the differential. Steve http://xjeep.dyndns.org Jeff Strickland wrote: > > The hubs lock through a vacuum mechanism. > > > wrote in message > ups.com... > >>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual, >>part-time 4WD tranny. The previous owner told me that you needed to >>back it up to unlock the hubs after having it in 4WD. I had to do this >>for my 88 Trooper. But I haven't seen anything in the Jeep owner's >>manual about backing up to unlock the hubs. >> >>Do I need to back to unlock hubs, or not? |
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