Rumble when accelerating. Could it be pinon angles?
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JK Newbie
Joined: Feb 2014
Posts: 87
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From: Seattle
Rumble when accelerating. Could it be pinon angles?
Hey guys. Could use your input. Ever since installing my 2.5" lift and 35" tires my jeep makes this rumble/studder problem when accelerating hard (from stop, or from low gear rolling). I haven't done a regear yet and am still running the small stock ratio. I've just been gentle with it up until now...today I was stopped at a light and when to accelerate and got the rumble really but, however this time it was accompanied by a strange squeeking sound.
Something strange to note, after I installed the lift I went for a few days without reprogramming with the AEV programmer. The rumble would happen then too, but it would throw a error code of something like "wrong 2nd gear input/output ratio". I can't remember the error code but will track it down. Since doing the reprogram the error doesn't get thrown when the rumble happens.
I've taken some shots of my driveline to see if you guys can notice any obvious issues. I'm thinking that the front shaft angles on the stoke CV might be the cause of this. One thing I've found strange about my lift is that the front sits slightly higher than the rear. I was told that this is normal and is done because Teraflex expects customers to out winches and larger bumpers on the front.
So with all that said, can anyone offer advice with this issue? I'll post a link to some photos for better diagnoses.
Thank you and Happy Thanksgiving,
Bradley
Something strange to note, after I installed the lift I went for a few days without reprogramming with the AEV programmer. The rumble would happen then too, but it would throw a error code of something like "wrong 2nd gear input/output ratio". I can't remember the error code but will track it down. Since doing the reprogram the error doesn't get thrown when the rumble happens.
I've taken some shots of my driveline to see if you guys can notice any obvious issues. I'm thinking that the front shaft angles on the stoke CV might be the cause of this. One thing I've found strange about my lift is that the front sits slightly higher than the rear. I was told that this is normal and is done because Teraflex expects customers to out winches and larger bumpers on the front.
So with all that said, can anyone offer advice with this issue? I'll post a link to some photos for better diagnoses.
Thank you and Happy Thanksgiving,
Bradley
Thread Starter
JK Newbie
Joined: Feb 2014
Posts: 87
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From: Seattle
JK Freak
Joined: Nov 2013
Posts: 577
Likes: 1
From: Colorado
Did you install exhaust spacers for cross over pipe . Sometimes the stock front drive shaft can make contact with the cross over pipe
Or brace, if you didn't physically change R&P gears you shouldn't be changing ratio with programmer. Just tire size
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Or brace, if you didn't physically change R&P gears you shouldn't be changing ratio with programmer. Just tire size
Sent from my iPad using JK-Forum
JK Super Freak
Joined: Mar 2014
Posts: 1,156
Likes: 2
Hey guys. Could use your input. Ever since installing my 2.5" lift and 35" tires my jeep makes this rumble/studder problem when accelerating hard (from stop, or from low gear rolling). I haven't done a regear yet and am still running the small stock ratio. I've just been gentle with it up until now...today I was stopped at a light and when to accelerate and got the rumble really but, however this time it was accompanied by a strange squeeking sound.
Something strange to note, after I installed the lift I went for a few days without reprogramming with the AEV programmer. The rumble would happen then too, but it would throw a error code of something like "wrong 2nd gear input/output ratio". I can't remember the error code but will track it down. Since doing the reprogram the error doesn't get thrown when the rumble happens.
I've taken some shots of my driveline to see if you guys can notice any obvious issues. I'm thinking that the front shaft angles on the stoke CV might be the cause of this. One thing I've found strange about my lift is that the front sits slightly higher than the rear. I was told that this is normal and is done because Teraflex expects customers to out winches and larger bumpers on the front.
So with all that said, can anyone offer advice with this issue? I'll post a link to some photos for better diagnoses.
Thank you and Happy Thanksgiving,
Bradley
Something strange to note, after I installed the lift I went for a few days without reprogramming with the AEV programmer. The rumble would happen then too, but it would throw a error code of something like "wrong 2nd gear input/output ratio". I can't remember the error code but will track it down. Since doing the reprogram the error doesn't get thrown when the rumble happens.
I've taken some shots of my driveline to see if you guys can notice any obvious issues. I'm thinking that the front shaft angles on the stoke CV might be the cause of this. One thing I've found strange about my lift is that the front sits slightly higher than the rear. I was told that this is normal and is done because Teraflex expects customers to out winches and larger bumpers on the front.
So with all that said, can anyone offer advice with this issue? I'll post a link to some photos for better diagnoses.
Thank you and Happy Thanksgiving,
Bradley
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Thread Starter
JK Newbie
Joined: Feb 2014
Posts: 87
Likes: 0
From: Seattle
Damn. Think it could be something as serious as my transmission going out? I've read somewhere around the internet that a faulty torque converter can produce similar symptoms as what I've experienced.
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Thread Starter
JK Newbie
Joined: Feb 2014
Posts: 87
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From: Seattle
Sorry guys, holiday season has kept things busy.
I haven't had a chance to take the Jeep in for a look. I got under and checked the lug nuts, everything looks fine. Next will be to make sure everything with the suspension is torqued.
I feel like it's getting worse in this past week, so thinking of getting it in sooner than later.
I haven't had a chance to take the Jeep in for a look. I got under and checked the lug nuts, everything looks fine. Next will be to make sure everything with the suspension is torqued.
I feel like it's getting worse in this past week, so thinking of getting it in sooner than later.