88 IROC - Whiny Rear-End while coasting, goes away when accelerating

Discussion in 'Transmission & Driveline Topics' started by mgd1790, Sep 1, 2020.

  1. GoldenOne7710

    GoldenOne7710 Equal Opportunity Offender Lifetime Gold Member

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    It probably IS bad at this point. I would go ahead and pull the yoke and change the seal while you're there...then reinstall the yoke and tighten the nut to the specs BGH posted. Remember to top off the gear oil...most of yours was on the exhaust pipe and torque arm.

    Oh yeah...might want to kill the spider.
     
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  2. ronzz572

    ronzz572 Veteran Member Lifetime Gold Member

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    Mike judging by what I saw in the video the pinion yoke doesn't even look correct. And,, Also someone actually used a bolt with a hex nut on the u joint strap. Even if tightening the pinion nut fixes the rear. That pinion yoke is going to rattle your teeth from vibration at 60 mph. It will need replaced.
     
  3. 76z28

    76z28 Veteran Member

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    I just started having this issue on Sunday on my way home from 100 mile drive.... Really hoping it's a loose pinion nut.... Otherwise I'll be going to a 9 inch with 4.30 gears
     
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  4. Knuckle Dragger

    Knuckle Dragger Mayor of Simpleton Staff Member Lifetime Gold Member

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    Kind of a waste of time and money to change the seal until you know if the bearings are good, IMO
     
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  5. John Wright

    John Wright Veteran Member Lifetime Gold Member

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    BGH said it...the seal just keeps the oil in and the dirt out. You have something more than just a seal going on. Take the drive shaft off the pinion yoke and try tightening that pinion nut. That won't cost anything to try.
     
  6. dkcamaro

    dkcamaro Veteran Member Lifetime Gold Member

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    Looks like someone beat the hell out of the yoke with a BFH. Probably to change the seal that is hanging out of the housing. Oil should be pouring out? Looks kind of dry?
    I like what looks like a regular nut and bolt holding the strap on
     
  7. big gear head

    big gear head Veteran Member

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    I've seen people put a rear end together with a new crush spacer and not go through the procedure of crushing it. They thought that when the nut got tight it was good enough. This could be the case here.
     
  8. 76z28

    76z28 Veteran Member

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    I wish that were my freaking case, mine was set at 18inch pounds and after about 8,000 miles just started. I am hopeful a bearing isn't going out as it is only on decel, but we will see saturday!
     
  9. Lowend

    Lowend Administrator. .a car, a man, a maraca. Staff Member Lifetime Gold Member

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    Those 7.5" 10-bolts are notoriously weak. it was originally designed for the 6-Cylinder Vega, which had a whole 120 ft/lbs of torque.
    I can't keep track of how many of those things I saw destroyed in 4th gens
     
  10. big gear head

    big gear head Veteran Member

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    I took a look at that video again. The yoke needs to be replaced if you intend to keep this. Someone has been done some damage to that thing.
     

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