Over 2 Months and Still No Moby - Manual Transmission Woes

munstie

New member
I think we're ready just to proceed with Plan B.[/QUOTE]

What's plan B Hemi conversion.

2011 JKU 3.5 R.E. Longarm lift.
 

J-Dub253WA

New member
I think I speak for everyone on this thread.....I can't friggin wait to hear about or see "Plan B"! I'm sucked in and subscribed!


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JAGS

Hooked
In college it sure was! :whew: I owe a few scientists a big :bowdown: for getting me where I am today without any speed-bumps ;)

Yep. Now you just got crabs and hep. LMAO.

Just messing with you Chris. I'm in a mood tonight if you can't tell from the high level of sarcasm in ALL my posts.
 

JeepFan

Hooked
Hard to tell over the tire noise, :thumb: but it does sound like a loaded bearing issue in the trans. Back in the day when I worked for a Jeep dealer, I vaguely recall hearing this type of noise in many Borg Warner 5 speed transmissions in the 1984-1986 models CJ7's. From the way it disappears while shifting I'd say maybe a cluster gear on the countershaft. A good trans tech should be able to verify the noise is in the trans but, it will need to be taken apart for further inspection.

I hope everything works out as painless as possible. Moby needs to get back on the trail soon! :thumb:

T...
 

TheDuff

New member
If plan B is a hemi swap, I think it needs to be renamed to project preperation H
:p

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nacho

New member
I can toss in my 2 cents, I get payed a bunch of money to pretend I know what I am talking about. From what I can see and hear the noise seems to escalate with road speed and gear change. You have to understand what happens in the transmission, basically you have two sides, input and output. One gear, typically 3 or 4 the whole transmission spins together (1:1 ratio) being I never heard the noise stop just increase I would start looking at the back half, From the output of the trans to the rear axle. If dynatrac says its not the axle I would be comfortable looking further up the chain. Try pulling the rear shaft and tossing it in 4wd and see if the noise changes. I believe that the noise is somewhere between the output side (internal output shaft) of the transmission and the rear axle. But this is going strictly from watching a video. Can you "feel" the noise in the shifter? any metal in the trans oil?
 
I just had a thought. You might be able to isolate if it is the transmission. If you are going down the road try outing pressure in the shifter it see if the noise goes away. Might be able to isolate if it is synchro gears or drive gears. Maybe you have already done this. Just trying to help.
 

wayoflife

Administrator
Staff member
I know this is a really old thread but, being that we now officially know for sure what this crazy sound was coming from, I thought I should post an update... just in case you ever get it. As some of you know, we replaced Moby's ProRock 60 rear axle with a ProRock 80 when we upgraded our 3.8L motor with a 6.2 LS and, rather than selling the old 60, we decided to hand it down to Rubicat. Well, about a week ago, we had the axle installed and as soon as it was in, I got a call from Off Road Evolution asking if we were having any issues or noise coming from our transfer case. Confused, I asked Cindy if she was aware of anything and as soon as I did, she closed her eyes and told me to ask them if there was any chance the sound was coming from the rear axle... the one that used to be on Moby :doh:

Upon initial inspection, everything looked okay. Ring checked out but, there was a suspicious shiny wear mark on the teeth that warranted further inspection. And, after pulling out the carrier, this is what they found...

IMG_8235.jpg

Needless to say, sound has a way of traveling. And, even if everything looks okay with your ring gear, it helps to pull things apart and give everything a harder look. Anyway, if you ever have a sound like this on your Jeep, you'll now know where else to look for it. Hope this helps you out.
 
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