Diesel JD
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Yeah I'm having a louder howl than usual only when I declerate...any idea what it could be? ATS non gated turbo, 6.9, C6. Thanks in advance
Hooowl on acceleration
- Thread starter Diesel JD
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Dieselguy123
Full Access Member
Which part of the vehicle is it coming from?
Diesel JD
Full Access Member
don't know transmission shop says I've been stack shifting my C6. I wonder if its not happy. What could be the possibilities. Hard to say I know without hearing it.
illinoisboy
Full Access Member
same thing happend to my 85 3/4 ton, made a howling noise when i let off the gas. the nut holding the yoke into the rear differential was lose. 5 minute fix for me.
Diesel JD
Full Access Member
I thoiught of the diff....and it is the only time it happens.... which nut do you mean.... differential to driveshaft yoke or what...where is it exactly?
illinoisboy
Full Access Member
on mine, i removed the rear u joint(good time to replace if needed), and the nut that was loose on mine, is the one that holds the yoke(that the rear u joint attaches to)into the rear diff. it was like and 1 1/8 or 1 1/4 socket. it needs to be torqued down to specs. the nut itself may be bad and it might keep backing off. i put new rear axle seal in mine and didnt get it tight enough the first time. i got lucky. i thought the whole rear end was going out. it made a horrible noise! good luck
Be careful there is not a specific torque spec for the nut (IE 160 lb-ft) on these diff's (Sterlings) there is a crush sleeve in there that determines the 'pre-load' on the pinion bearings. This means that tightening the nut up too far will put too much load on the bearings and cause failure. The correct procedure involves tightening the nut until it requires 'x' lb-in force to turn the pinion. It is very important to not re-use a pinion nut if it is removed for any reason. Not to say it can't be done but...
