Whine in front end

1127xj · 10-19-2012, 09:37 PM

I have noticed that in 4wd, there is a whining noise from the front end. It seems to be mostly when letting off the throttle and changes pitch if I accelerate. If I can hold a steady throttle, it is much quieter. In 2WD, the noise is completely absent. Should I assume this is a pinion bearing issue? It seems to have developed since I replaced the ball joints, but honestly I don't use 4WD often, so it could be coincidence. I had a leaking pinion seal replaced a couple years ago, but it was quiet after the replacement. Any suggestions?

cf1k1 · 10-19-2012, 09:40 PM

Check your diff fluid.

1127xj · 10-19-2012, 09:48 PM

I have, it's full. Sorry, forgot to mention that.

cf1k1 · 10-19-2012, 09:49 PM

Quote:

Originally Posted by 1127xj

I have, it's full. Sorry, forgot to mention that.

Not talking about fluid levels... The actual condition of the oil

beefmobile · 10-19-2012, 09:54 PM

4-lo or 4-hi? normally in 4-lo, i've gotten a whine in all the Jeeps i've ever had...in fact, that's how i know 4x4 is working...

1127xj · 10-19-2012, 10:04 PM

4Hi. I haven't changed the fluid, but it was changed when the pinion seal was replaced.

1127xj · 10-19-2012, 10:05 PM

Quote:

Originally Posted by 1127xj

4Hi. I haven't changed the fluid, but it was changed when the pinion seal was replaced.

Without dumping it, it doesn't show any obvious signs of contamination.

1976Mustang · 10-19-2012, 10:07 PM

Quote:

Originally Posted by beefmobile

4-lo or 4-hi? normally in 4-lo, i've gotten a whine in all the Jeeps i've ever had...in fact, that's how i know 4x4 is working...

That would be the transfer case, all transmissions/transfer cases make that noise in really slow gears. My Ranger does it in first. No clue what causes it though, something i want to figure out.

1976Mustang · 10-19-2012, 10:09 PM

Now that i think about it, my rear diff makes that noise at highway speed, i always figured it was normal... I'm thinking otherwise now.

1127xj · 10-19-2012, 11:58 PM

This is a new noise, don't believe it's normal because it was never there before.

freegdr · 10-20-2012, 02:31 AM

Check tc fliud level lately?

1127xj · 10-20-2012, 05:50 PM

Quote:

Originally Posted by freegdr

Check tc fliud level lately?

yep, it's full.

1127xj · 10-21-2012, 06:08 PM

BTW, I did bring it to the dealer, and was told something is going in the ft. diff. or tc, but they were not sure what it is. They recommended I drive it until it gets louder so they can pinpoint it. Then they charged me $80 for "diagnosis." I already knew that much, thanks a bunch. This is why I rarely visit dealers, what a load of crap...

1976Mustang · 10-21-2012, 07:12 PM

I ONLY go to the dealer if i need Mopar parts in a hurry.
IDK about all AAMCO's, but the one i always go to usually diagnoses for free. They tore my transmission apart a week ago free of charge. I'm sure you can find a place that does free diagnostics.

coloradocherokee · 10-23-2012, 01:25 AM

Quote:

Originally Posted by 1127xj

Without dumping it, it doesn't show any obvious signs of contamination.

very true...found this out when i changed mine....looked like coal water...previous owner mustuve never changed it..in fact myb it had never been changed at all

10-19-2012, 09:40 PM	#2
cf1k1 CF Veteran 2001 Jeep Cherokee Join Date: Aug 2010 Location: South Florida Posts: 5,068 My Photos 2001 Cherokee Engine: I-6 4.0 L Transmission: AW4 Rear Axle: Chrysler 8.25 29 Spline (Powertrax No-Slip) Tires: 33x12.50x15 BFG KM2's Lift Specifications: 5.5" MUT Misc Accessories: Kicker Speakers, Pioneer deck, 12" Audiopipe Sub, 2000 watt audiofonic amp, Realistic TRC 419	Check your diff fluid. __________________ BAHM Gentlemen, you had my curiosity. But now you have my attention. Check out my build thread here: Black Betty Zombie Response Group: http://www.cherokeeforum.com/groups/...nse-jeep-club/ *Modifications:* -5.5" Mut Lift (3.5" RE Superflex leaf, 5.5" RE Coil, 2.5" AutoZone Shackle, 5.5" RE Control arms, Trac Bar drop, TC Drop) -Powertrax No-Slip Locker -CB Radio -Strobes -Whelen Speaker -"Audible Warning Device"

10-19-2012, 09:54 PM	#5
beefmobile Member Garage is empty, add now Join Date: Jan 2012 Location: Dallas Posts: 174 My Photos 1995 Cherokee Engine: 4.0 Transmission: AW4 Transfer Case: NP231 Front Axle: Dana 30 Rear Axle: Chrysler 8.25 Tires: 30" A/T Lift Specifications: None Misc Accessories: Car Seats and Stroller	4-lo or 4-hi? normally in 4-lo, i've gotten a whine in all the Jeeps i've ever had...in fact, that's how i know 4x4 is working... __________________ '90 YJ Laredo - 35" Baja Claws, SOA Conversion, SYE, Ford 8.8, Geared 4.56, monster front bumper, 10k Smittybilt winch, etc '95 XJ 4x4 - 4.0 H.O., 5 Speed, 30" A/Ts '86 XJ 4x4 - 2.8 V6, auto, 31" M/Ts, Budget Boost U.S. Marine Corps

10-19-2012, 10:09 PM	#9
1976Mustang CF Veteran 1992 Jeep Cherokee My Garage Join Date: May 2012 Location: Evans, Colorado Posts: 2,466 My Photos 1992 Cherokee Sport Engine: AMC 242 I6 - Chrysler MPI "High Output" Transmission: Aisin-Warner AX15 5-speed manual Transfer Case: New Process NP231 "Command-Trac" Front Axle: Dyna 30 Rear Axle: Dyna 35 Tires: GoodYear Mesa 31x10.5 A/P Lift Specifications: 3 Inch Rough Country - Flat OEM leaf springs Misc Accessories: Cobra 29 LTD ST - PIAA Fog lights	Now that i think about it, my rear diff makes that noise at highway speed, i always figured it was normal... I'm thinking otherwise now. __________________ '92 XJ Sport "Raider" - AMC 242, AX-15, NP231, 220k miles - 3inch RC AAL lift, 703 injectors, cowl snorkel - 31/10.5 MESA A/P's(Build Thread) '01 Ranger EDGE "Hornet" - 4.0 SOHC V6, 5R55E, 2-Speed 4x4, 140k miles - Stock as a Rock and built like one too XJ Mantanance Tips HERE! Resident CF Furry. That's right, I'm a Furry. Look it up. Remember: Post count doesn't mean jack-crap! I got over 2k posts, and I'm still an idiot!

10-20-2012, 02:31 AM	#11
freegdr CF Veteran 1989 Jeep Cherokee Join Date: Mar 2010 Location: in our own home hollywood, florida Posts: 25,023 My Photos 1989 xj sport 2dr Cherokee Engine: 4.0 neon injectors Transmission: 5speed 2000 nv3550 Transfer Case: 231 sye 2000 tj Front Axle: dana30 410s Rear Axle: 8.25 29 spline lunched Tires: 38/15.5/15 ground hawgs Lift Specifications: 13 front 12 rear Misc Accessories: a lot of foul language,skin ,cuts and bruises and a lot of blood	Check tc fliud level lately? __________________ its all in your altitude,horn broke watch for finger

10-21-2012, 07:12 PM	#14
1976Mustang CF Veteran 1992 Jeep Cherokee My Garage Join Date: May 2012 Location: Evans, Colorado Posts: 2,466 My Photos 1992 Cherokee Sport Engine: AMC 242 I6 - Chrysler MPI "High Output" Transmission: Aisin-Warner AX15 5-speed manual Transfer Case: New Process NP231 "Command-Trac" Front Axle: Dyna 30 Rear Axle: Dyna 35 Tires: GoodYear Mesa 31x10.5 A/P Lift Specifications: 3 Inch Rough Country - Flat OEM leaf springs Misc Accessories: Cobra 29 LTD ST - PIAA Fog lights	I ONLY go to the dealer if i need Mopar parts in a hurry. IDK about all AAMCO's, but the one i always go to usually diagnoses for free. They tore my transmission apart a week ago free of charge. I'm sure you can find a place that does free diagnostics. __________________ '92 XJ Sport "Raider" - AMC 242, AX-15, NP231, 220k miles - 3inch RC AAL lift, 703 injectors, cowl snorkel - 31/10.5 MESA A/P's(Build Thread) '01 Ranger EDGE "Hornet" - 4.0 SOHC V6, 5R55E, 2-Speed 4x4, 140k miles - Stock as a Rock and built like one too XJ Mantanance Tips HERE! Resident CF Furry. That's right, I'm a Furry. Look it up. Remember: Post count doesn't mean jack-crap! I got over 2k posts, and I'm still an idiot!

10-19-2012, 09:48 PM	#3
1127xj Junior Member Garage is empty, add now Join Date: Jul 2010 Location: Charlestown, NH Posts: 59 My Photos 2000 Cherokee Engine: 4.0L Transmission: AW4 Transfer Case: NP242 Front Axle: Dana 30 Rear Axle: Dana 35 posi	I have, it's full. Sorry, forgot to mention that.

10-19-2012, 10:04 PM	#6
1127xj Junior Member Garage is empty, add now Join Date: Jul 2010 Location: Charlestown, NH Posts: 59 My Photos 2000 Cherokee Engine: 4.0L Transmission: AW4 Transfer Case: NP242 Front Axle: Dana 30 Rear Axle: Dana 35 posi	4Hi. I haven't changed the fluid, but it was changed when the pinion seal was replaced.

10-19-2012, 11:58 PM	#10
1127xj Junior Member Garage is empty, add now Join Date: Jul 2010 Location: Charlestown, NH Posts: 59 My Photos 2000 Cherokee Engine: 4.0L Transmission: AW4 Transfer Case: NP242 Front Axle: Dana 30 Rear Axle: Dana 35 posi	This is a new noise, don't believe it's normal because it was never there before.

10-21-2012, 06:08 PM	#13
1127xj Junior Member Garage is empty, add now Join Date: Jul 2010 Location: Charlestown, NH Posts: 59 My Photos 2000 Cherokee Engine: 4.0L Transmission: AW4 Transfer Case: NP242 Front Axle: Dana 30 Rear Axle: Dana 35 posi	BTW, I did bring it to the dealer, and was told something is going in the ft. diff. or tc, but they were not sure what it is. They recommended I drive it until it gets louder so they can pinpoint it. Then they charged me $80 for "diagnosis." I already knew that much, thanks a bunch. This is why I rarely visit dealers, what a load of crap...

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10-23-2012, 01:25 AM