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XJ Ask the Question Thread
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Seasoned Member
Joined: Dec 2013
Posts: 473
Likes: 0
From: SATX
Year: 1999
Model: Cherokee
Engine: 4.0 I6
anyone ever use both rubber and polyurethane bushings on their brown dog motor mounts? which ones did you prefer? and what would you recommend for south texas weather? hot and humid summers with mild winters.
Senior Member
Joined: Feb 2014
Posts: 854
Likes: 1
From: Minnesota
Year: 1996
Model: Cherokee
Engine: 4.0
Seasoned Member
Joined: Dec 2013
Posts: 473
Likes: 0
From: SATX
Year: 1999
Model: Cherokee
Engine: 4.0 I6
CF Veteran
Joined: Apr 2014
Posts: 1,028
Likes: 0
From: Hagerstown MD
Year: 93
Model: Cherokee
Engine: 4.0 I6 w/Flux Capacitor
So sitting inside my jeep i can hear what sounds like my transmission is brewing coffee. It makes that light thumpy knocking kinda sound. If i put my hand on the floor over the trans i can feel it. It happens in all gears except drive. Im being cautious and thinking "yanno maybe the exhaust is tapping something" When i crawl under the engine noise is too loud to really trace where the sound is coming from. Ideas as to what i should look at? Or am i boned and my trans is about to explode.
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Man you have some weird coffee makers in Maryland if they make light thumpy knocking kinda sounds...

Made for pinpointing noises. Dirt cheap at Harbor Freight. This weekend probably like $3 or something lol
Your transmission has the right amount of fluid in it yes?

Made for pinpointing noises. Dirt cheap at Harbor Freight. This weekend probably like $3 or something lol
Your transmission has the right amount of fluid in it yes?
CF Veteran
Joined: Apr 2014
Posts: 1,028
Likes: 0
From: Hagerstown MD
Year: 93
Model: Cherokee
Engine: 4.0 I6 w/Flux Capacitor
But it makes a bubble/churning sound and a thump sound after the bubble
No, I don't lick fish.



Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Long **** screwdriver is what I use. Got one at the dollar store section of the flea market here for.... a dollar. Shaft is about 2' long.
Seasoned Member


Joined: Oct 2012
Posts: 328
Likes: 5
From: Dominican Republic
Year: 1990
Model: Cherokee
Engine: inline 6
So sitting inside my jeep i can hear what sounds like my transmission is brewing coffee. It makes that light thumpy knocking kinda sound. If i put my hand on the floor over the trans i can feel it. It happens in all gears except drive. Im being cautious and thinking "yanno maybe the exhaust is tapping something" When i crawl under the engine noise is too loud to really trace where the sound is coming from. Ideas as to what i should look at? Or am i boned and my trans is about to explode.
CF Veteran
Joined: Apr 2014
Posts: 1,028
Likes: 0
From: Hagerstown MD
Year: 93
Model: Cherokee
Engine: 4.0 I6 w/Flux Capacitor
CF Veteran
Joined: Oct 2009
Posts: 2,867
Likes: 16
From: Fauquier County, Virginia
Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
Finishing up brake line replacement today. For my axle hard lines, I wrapped them in 3/16 fuel line for protection. Will this be alright?
Seasoned Member
Joined: Dec 2009
Posts: 269
Likes: 1
From: Eastern NC
Year: 93
Model: Grand Cherokee
Engine: 5.2
My jeep sometimes decides it doesn't want to run.. This has been going on for a couple months now. Sometimes it would start strong, then die while RPMs drop to idle speed, and other times it would start/run/drive as usual. Now it won't run at all. On board diagnostics throws codes 12(battery disconnected, duh), 33(a/c code but I deleted my a/c years ago), and 55 to end code reading.. Distributor, cap, and wires were replaced a year ago and look fine. Plugs replaced a couple weeks ago and I have confirmed spark. Battery is good. Alternator was replaced a year ago but some interior lights are randomly coming on when key is in "on" position. IAC and throttle body removed, cleaned/inspected and reinstalled. Bypassed fuel ballast resistor, problem remains. Cleaned vacuum lines.
I have not checked fuel pressure yet, but in doing all this I have noticed that my PCM is making a high-pitched whining noise with the key in the "on" position. Has anyone heard of this being a sign of a PCM that needs to be replaced?
I have not checked fuel pressure yet, but in doing all this I have noticed that my PCM is making a high-pitched whining noise with the key in the "on" position. Has anyone heard of this being a sign of a PCM that needs to be replaced?
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Is your exhaust touching the crossmember? Time for that stethescope eh
Only thought I have is whether that wrapping will trap moisture and accelerate rust.
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Not unless you have a LOT of seam sealer on there. What kind of balancing did you have done? Some tires are really hard to balance and junk like WalMart aren't up to the task





