Help ! new to forum with a problem that's driving me nuts ! - JeepForum.com
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post #1 of 23 Old 06-19-2019, 07:33 AM Thread Starter
hot2na
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Help ! new to forum with a problem that's driving me nuts !

Been reading this forum ever since I purchased my new 2018 grand cherokee ltd last yr.Last week I bought a USED 2013 jeep grand cherokee overland with a hemi, and while i was at the dealer also purchased a 4yr/48k bumper to bumper extended warranty (mopar vehicle protection)


here's the problem. from a stop if you accelerate hard you will hear a sharp popping noise . Almost as if it's banging into 2nd hard. But it also happens when stopped in the driveway when i apply the parking brake and hold my foot on the gas and place trans in reverse..it clunks as you accelerate.
doesnt always happen when hard acceleration takes place -intermittent.
after doing alot of research -I came up with the following ideas:

transfer case
transfer case control module (under driver's seat)
transmission mount
u joints


I'm baffled and don't want to make a career out of bringing it to the dealer...anyone on here experience this ? I've seen mention of it on a u tube video - but no solution was mentioned ..


any help appreciated

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post #2 of 23 Old 06-19-2019, 07:54 AM
ColdCase
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Check the motor mounts, the engine could be flailing around in there Check the integrity of the drive shaft flex joint. Check transmission fill.

Otherwise it could be any number of drive train parts. There was a flash update for the ELSD on early models that had thump complaints, dunno if that affects your model.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #3 of 23 Old 06-19-2019, 01:37 PM Thread Starter
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motor mounts , ok. trans fluid ok.



hoping someone else will have experienced this issue and found a cure. .... ??
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post #4 of 23 Old 06-19-2019, 01:41 PM
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I agree with coldcase. Picture perfect sign of a motor mount needing replacement.
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post #5 of 23 Old 06-19-2019, 02:03 PM
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I wouldn’t hit the gas with the parking brake on.

Maybe your calipers are loose and sliding around when going from reverse to forwards.

Also if you have a warranty let the dealer figure it out. That is what a warranty is for after all.
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post #6 of 23 Old 06-20-2019, 03:01 AM Thread Starter
hot2na
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Problem is : getting the problem to HAPPEN for the dealer to see...otherwise they check a couple things and send you on your way...that -unfortunately-is the game ...'
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post #7 of 23 Old 06-20-2019, 09:38 AM
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Quote:
Originally Posted by hot2na View Post
Been reading this forum ever since I purchased my new 2018 grand cherokee ltd last yr.Last week I bought a USED 2013 jeep grand cherokee overland with a hemi, and while i was at the dealer also purchased a 4yr/48k bumper to bumper extended warranty (mopar vehicle protection)


here's the problem. from a stop if you accelerate hard you will hear a sharp popping noise . Almost as if it's banging into 2nd hard. But it also happens when stopped in the driveway when i apply the parking brake and hold my foot on the gas and place trans in reverse..it clunks as you accelerate.
doesnt always happen when hard acceleration takes place -intermittent.
after doing alot of research -I came up with the following ideas:

transfer case
transfer case control module (under driver's seat)
transmission mount
u joints


I'm baffled and don't want to make a career out of bringing it to the dealer...anyone on here experience this ? I've seen mention of it on a u tube video - but no solution was mentioned ..


any help appreciated

Hello hot2na,

If you end up going into the dealer, let us know. We're available via direct message and would be happy to help with that process.

Jasmine
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post #8 of 23 Old 06-20-2019, 10:58 AM Thread Starter
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Thank you , Jasmine ..I will be going to the dealer within the next 2 weeks.

When i have a definite appt I will let u know.
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post #9 of 23 Old 06-21-2019, 09:10 AM
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Thank you , Jasmine ..I will be going to the dealer within the next 2 weeks.

When i have a definite appt I will let u know.
Thanks for circling back, hot2na. I'll keep my eyes peeled for any future updates.

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post #10 of 23 Old 07-02-2019, 02:27 AM Thread Starter
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dealer appt for next thurs 7/11 sent pm with requested info to jeep cares,Alex
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post #11 of 23 Old 07-02-2019, 02:57 AM
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Yes I have to agree with JCE and Cold Case.

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post #12 of 23 Old 07-02-2019, 02:59 AM
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Quote:
Originally Posted by PwnCall View Post
I wouldn’t hit the gas with the parking brake on.

Maybe your calipers are loose and sliding around when going from reverse to forwards.

Also if you have a warranty let the dealer figure it out. That is what a warranty is for after all.
What he said, Let the dealers service department figure it that' what they are there for.

"Without Trucks America Stops!"
"I woke up still not dead again today!"
"There's too much Blood in my Caffeine System"

"Boycott the NFL" "Boycott Nike "
"Semper Fi"
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post #13 of 23 Old 07-02-2019, 11:25 AM Thread Starter
hot2na
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Originally Posted by w6pea View Post
Yes I have to agree with JCE and Cold Case.
yes, they both had good thoughts...It's going to the dealer next week...we'll see what happens
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post #14 of 23 Old 07-13-2019, 04:32 AM Thread Starter
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Here's what happened with the dealer: after taking the service mgr for a ride ,the problem showed up and he was able to experience it first hand...then back to the shop and the techinician was able to reproduce the issue. He said he's seen the exact same problem with an SRT ..and are suspecting the TRANSFER CASE...Jeep has 83k on it. The dealer wants ME to pay for a fluid exchange on the transfer case 1st since that is not covered under the max care warranty...the next step as per a "chrysler engineer"is to add FRICTION MODIFIER to the new transfer case fluid and see if that solves the issue..lastly if that doesn't work -they may replace the transfer case altogether..
First I dont see why I need to pay to have the trnfr case serviced @83k when the owners manual recommends 120k..Second I dont think I should accept the idea of putting friction modifier in the transfer case ! this could be a band-aid on a real issue with the clutch paks..
Does anybody on here see why I am leery of all this ???

Would any of YOU accept friction modifier as a solution to a malfunctioning transfer case ??
Please all- chime in- I have till monday till the dealer begins doing any of this !!
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post #15 of 23 Old 07-13-2019, 09:28 AM
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It may not be the transfercase, but the previous owner contaminated the fluid by fording or driving in a severe duty or abusive type environment (perhaps driving in 4Low on dry pavement). Dunno how one can tell. For the 2013 model year, the fluid should be checked every 20,000 miles (30,000 miles newer models) and changed if contaminated. Changed at 120,000 miles regardless.

Changing the fluid and adding friction modifier is the usual first step as that solves clutch problems 90% of the time.

I would be more upset with the dealer selling you a vehicle with contaminated fluid, didn't they check these things? You should have some kind of 30-90 day warranty on the sale to cover that. I would expect the dealer to pick up the dime on that.

You could contact Jeep customer service and see if they can light a fire Under them. Or chalk it up to one of those unexpected expenses when buying used, and move on.

I wouldn't expect popping from the transfercase clutches when accelerating in a straight line or at a standstill unless one wheel loses traction. Thats usualy a transmission clutch issue. These transfer cases power the rear axle straight through without a clutch. There is a reduction gear that perhaps can be a problem, but not likely the clutch. The dealer probably has to follow FCA direction regardless.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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