Jeep driveline bad grinding noise help - Team Camaro Tech
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post #1 of 8 (permalink) Old Dec 15th, 15, 02:45 PM Thread Starter
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Jeep driveline bad grinding noise help

Hey guys looking for help with this. I have a '05 Jeep Rubicon 6 speed. It started making this grinding noise like metal to metal when your disc brakes go. Sounded to me like a bad bearing. The sound was pretty much non existent during acceleration and when the clutch was pressed to the floor. Sound was god awful during deceleration while still in gear with the clutch engaged. Push in the clutch - grinding goes away - let it out slowly and grinding comes back and get louder the more the clutch pedal is released. Last week went into the shop for a replacement trans from mopar. Was told it was a bad input shaft bearing. I was getting prices from $1500 and up to repair or $2500 for a new rebuilt right from mopar with a 3 year/100,000 mile warranty. Thought it would be beneficial to go with the new rebuilt and warranty. Needless to say just got it back today $3200 in the hole and sound is still there - just ALOT quieter. Think I got a bad trans??? Any thoughts? They told me to drive it until they talk to mopar warranty dept.
thanks guys

'68 Camaro with RS conversion
Moser 9" with 4:11
Martz Chassis 4-link and Front Sub-frame
Tremec T-56 Magnum 6 speed
572 BB - CM Engines
Wilwood 6 piston front and 4 piston rear disc
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post #2 of 8 (permalink) Old Dec 15th, 15, 02:49 PM
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Re: Jeep driveline bad grinding noise help

Any way to pinpoint where exactly the noise comes from. Maybe someone walk or drive next to you and listen. It could just be another bad tranny. T
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post #3 of 8 (permalink) Old Dec 15th, 15, 04:10 PM Thread Starter
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Re: Jeep driveline bad grinding noise help

Quote:
Originally Posted by bigblockragtop View Post
Any way to pinpoint where exactly the noise comes from. Maybe someone walk or drive next to you and listen. It could just be another bad tranny. T
Poor mans stethoscope(long handled screwdriver) to the trans case and it seems to be inside. May be transferring through the transfer case??? I am at a loss

'68 Camaro with RS conversion
Moser 9" with 4:11
Martz Chassis 4-link and Front Sub-frame
Tremec T-56 Magnum 6 speed
572 BB - CM Engines
Wilwood 6 piston front and 4 piston rear disc
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post #4 of 8 (permalink) Old Dec 15th, 15, 06:03 PM
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mike
 
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Re: Jeep driveline bad grinding noise help

I think since it got A LOT quieter with the new trans but still there, I would think the new trans has a problem also. If they think the new trans is fine then tell them to extend the warranty because you don't feel it is fine.
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post #5 of 8 (permalink) Old Dec 17th, 15, 03:10 AM
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Re: Jeep driveline bad grinding noise help

Which transfer case?

I had a 249 transfer case that grenaded on me. Sounded like that before it hallened. With the TC bolted to the transmission it could sound like it's coming from the trans.

I don't know if it can be done with the new jeeps but a 249HD transfer case isn't very expensive and is quite an upgrade.

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post #6 of 8 (permalink) Old Dec 20th, 15, 06:38 AM Thread Starter
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Re: Jeep driveline bad grinding noise help

Ok so here is the conclusion. It apparently was the CV joint in my driveshaft - chalk up another $300 to the equation. This is what has my head spinning tho. I told them to check the drive shafts 1st thing. They said they were fine and it was the trans. So did I get a new trans for nothing if the was the same noise as before the new trans just minimal or just a coincidence???? Maybe they greased the joints in the bad shaft when they replaced my trans and that made the sound minimal? Worst part is - they took my old trans when they delivered the new for the core - if I just got ripped off, I will never know.

'68 Camaro with RS conversion
Moser 9" with 4:11
Martz Chassis 4-link and Front Sub-frame
Tremec T-56 Magnum 6 speed
572 BB - CM Engines
Wilwood 6 piston front and 4 piston rear disc
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post #7 of 8 (permalink) Old Dec 20th, 15, 03:38 PM
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mike
 
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Re: Jeep driveline bad grinding noise help

Even if they did not diagnose properly, if you plan on keeping the Jeep at least now you have a new tranny with a warranty(and some more experience).
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post #8 of 8 (permalink) Old Dec 21st, 15, 07:19 AM Thread Starter
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Re: Jeep driveline bad grinding noise help

Jeep is definitely a keeper! Thing is paid off and this the is 1st investment that I had to do to it since new - other than all the mods I did and normal wear and tear items. Ready to go another 100,000 now

'68 Camaro with RS conversion
Moser 9" with 4:11
Martz Chassis 4-link and Front Sub-frame
Tremec T-56 Magnum 6 speed
572 BB - CM Engines
Wilwood 6 piston front and 4 piston rear disc
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