Question about Jeep CJ7

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Noise in front axle when turning.

I have a 79 cj 7 with a quadratrac transfer case. when i turn either way it makes a noise and kind of rocks or lounges. Is this normal for an all time fourwheel drive? or is something wrong?

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  • 237 Answers

Likely the viscous coupling and/or chain. Parts are quite expensive.

Posted on Jun 25, 2009

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I have a 1979 ford f250 4x4 and the tranfer case will go in but it wont turn the front driveline


I am a bit rusty on the 22 year old part. Someone else may be more informative, but on some of the 4x4 actuators they used different methods of moving the internal parts.

The actuator used to be Vacuum operated and the part would move a certain distance to put the transfer into high or low mode. If the actuator did not fully extend or contract you would be between gears; sort of in Neutral.

You are now faced with the front driveshaft free-wheeling(But which end?). Disconnect one end of the front driveshaft so you can feel whether the transfer case is free-wheeling or if the other end of the shaft is turning anything in the front axle. With the front hubs locked, the front driveshaft should not turn or if jacked up, the tires should spin when the front driveshaft is turned by hand.

When you are assured that the front axle is fine, then the problem can only be the transfer case. I remember people had a lot of trouble with the actuators.

I hope this gives you a way to test which end of the front driveshaft is the problem.

There are some Blogs on the internet like Ford4x4Owners.com and Off-Road Blogs which can be very helpful. I hope my suggestion helps.

Jul 08, 2012 | Ford Cars & Trucks

1 Answer

Grinding noise....sounds like metal


Check the disk brake pads. At slower speeds you can hear them squeak because there is less wind and road noise. The other possibility could be a bad u joint at the ends of the axle half shafts on the front differential. Check both. I really doubt it is the transfer case. You transfer case is engaged all the time. The axle is locked and engaged when you flip the lever by a vacuum motor on the axle shaft on the differential.

Apr 25, 2012 | 2000 Jeep Grand Cherokee

1 Answer

I can not get power to the motor to engage my front axle on my 4x4.


Power as in 12 V DC ? if yes, you are not in the correct area, the front axle is locked in and out of 4x4 mode with vacuum.

Operationally vacuum shifts the front axle between 2WD and 4WD mode. The GEM ( Generic Electronics Module ) applies ground to the solenoid needed for the mode selected on the switch ( for ESOF ) or when the transfer case shift lever is moved ( MSOF ).The contact plates in the transfer case signal the GEM that the transfer case is engaged, and the Vacuum solenoids need to be activated ( either 2WD to 4WD or 4WD to 2WD ).


Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
- If it turns it is a problem with the transfer case.
- If it doesn't it is a front axle engagement problem.

- If the front drive shaft does not turn :
•With the truck running ( with front wheel back on the ground ), switch from 2WD to 4WD and back again, the vacuum shift motor should move the lever on the front axle.
sscullys_200.jpg
Item #10 in this diagram
sscullys_10.gif
-- If the vacuum shift motor does not move:
1.Check for vacuum on the lines while shifting between modes. Pink vacuum line is 2WD mode, Light Blue vacuum line is 4WD.
2.Check the fuses for the 4WD system and the solenoids.
3.Check the vacuum lines from the vacuum shift motor to the solenoids on the firewall.
4.Check the vacuum lines from the solenoids to the vacuum reservoir box behind the battery.
5.Check the vacuum reservoir box for cracks.
6.Typical solution is the vacuum lines ( to the solenoids or to the vacuum shift motor ) are cracked or the vacuum shift motor has a cracked diaphragm and has water in it.
7.Could be the shift plate contacts in the transfer case are corroded / not making good contact, and not activating the solenoids.
sscullys_199.jpg

- If the front drive shaft turns:
For ESOF system
-- Check the fuses for the transfer case, engine compartment fuse panel, 17 & Cab fuse panel fuses 13 and 23 ( verify with owners manual, 97-97 & 99-03 MY can be slightly different on some items ).
-- Try hitting the transfer case with a dead blow hammer ( do not use a metal hammer, it can damage the transfer case ) to see if the transfer case shift motor is hung up .
-- Check the transfer case connector, to make sure the connector pins are clean and making good contact.
For MSOF systems
-- Check that the shift linkage on the transfer case is moving when the lever is moved from 2W to 4H and 4L.

Jul 30, 2011 | 2000 Ford F150 Flareside SuperCab

1 Answer

Front hubs not engaging or disengaging clicking


Is the front driveshaft turning but the wheels are not? or is the noise coming from the transfer case and the front driveshaft is stationary. If the driveshaft is not turning the problem is inside the transfer case. If the driveshaft turns, remove the front differential cover and make sure the gears are not damaged. Before doing that though, If the boots on the axles are torn, chances are that the c/v joints (one or both) have failed. The front diff is an "open type" which means that the wheel with the least amount of traction will receive all the power. If a joint fails there is no "traction": at that wheel so the opposite one will not turn as well. You will see the axle turning but the wheel will remain stationary. If joint has failed, most times it's faster and easier (and not much more $ to buy a complete rebuilt axle). Chilton or haynes manual outlines r&r...not terribly difficult job but if you have any questions about any of it just ask!

May 29, 2010 | 2000 Jeep Grand Cherokee

2 Answers

Strange wobble noise


your bearings. thats what it sounds like to me. if it almost sounds like you have a big rock just jumbling around in your tire thats most likely your bearings. its pricey but its worth it to get it fixed. if thats not it check into your transfer case and your shocks

Feb 23, 2010 | 2000 Chevrolet Blazer

1 Answer

When i put 79 k10 in four wheel drive it makes a loud knocking noise


check u joints for damage,also transfer case and front axle for lube gear oil

Feb 01, 2010 | 1983 Chevrolet Silverado

1 Answer

When I turn sharp turns my jeep makes a growling noise, like the 4 wheeldrive is activated why? It just started doing this about 6 mos ago


Which transfer case do you have? Does it have AWD or 4WD? Does it only do it while the steering wheel is being turned, or all the way through the turn?

If it does it only while turning the steering wheel, there is a bushing in the steering column that is making noise. I have seen this happen on an '00 and '01. If it is making noise all the way through the turn, and you have AWD, it probably is the front axle. A neighbor of mine had this happen on her '00. Turns out the front axle wasn't filled properly from the factory. Added the appropriate amount of gear oil and noise went away.

If you have 4WD, make sure you're not driving around with the transfer case locked in.

Dec 12, 2009 | 2003 Jeep Grand Cherokee

1 Answer

1999 Silverado Transfer Case Noise


I have the same problem and its in the front axle..Sounds like its in the t case but its the front axle.Make sure all your tires are the same size and same air pressure and the inner front axle seals are not leaking any fluid..

Mar 29, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Banging noise in 4 wheel drive under torque. front hub questions.


Hello scotch1812, those of us that still enjoy the square headlights have to stick together! The front axle in our YJ's are dana 30 with a high pinion! The high pinion make the ring and pinion spin in a reverse rotation from the dana 30 found in CJ and TJ Jeeps. When Chrysler designed the YJ front axle, they removed the manual hubs like those found in CJ models and installed a vacuum disconnect on the passenger side axle shaft. The passenger side axle shaft is 2 piece with a sleeve that is moved into place to connect the 2 pieces of axle shaft when you shift the transfer case into 4 wheel drive. This is done via a vacuum module mounted on the axle housing. If your module diaphram goes bad you have no 4WD! If your vacuum hose comes off of the module or breaks you have no 4WD. Now when your transfer case is in 2WD the front driveshaft does not turn. The vacuum disconnect allows this to happen. As for the hubs, they are simply hubs with sealed bearings and a universal joint to allow your front wheels to turn left and right. If you hear the banging noise in 2WD it could be a bad universal joint in one of your axle shafts.

Now if you are hearing the banging noise only when you are in 4WD there could be a number of reasons. You could have a broken axle shaft or a bad bearing in your ring and pinion. Your front driveshaft could be bent or at least not straight. I would start with the driveshaft. Just lay under the Jeep (Not running! With emergency brake set!) and spin the front driveshaft. If it spins true and doesn't have an out of round rotation we can rule that out! Also, grab it and push it and pull it to check to see if your universal joints in the drive shaft are gor and tight! They can make a grinding noise or popping noise if they are bad!

Try these and let me know what you find! We will find your problem!

map6260

Mar 13, 2009 | 1992 Jeep Wrangler

2 Answers

95'jeep cherokee leardo 4x4


Sory to tell you but it sounds like the transfer case needs to be repaired or replaced. When they start making that noise they only get worse.

Jan 29, 2009 | 1995 Jeep Grand Cherokee

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