88 Automatic Transmission problem

By kolk88
December 29, 2004 in 1999-2013 Silverado 1500 & Sierra 1500

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kolk88

Posted December 29, 2004

I have an 88 GMC 4x4 2500 w/ automatic OD trans. When I put it in reverse sometimes I hear a high pitched gear grinding noise, almost like the linkage is not quite fully engaged. I've checked the linkage, no problem, along with 2WD and 4WD operation, no problem, any suggestions as to the cause?

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  By 2022LtTbZ71 · Posted 45 minutes ago
  
  That stinks. I’m sitting on the side of the road right now with the same issue. Never had an issue before taking it in for the ground strap recall. Now I’m outside of warranty and they’ll probably want $200 just to diagnose what they already “fixed”.
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  By jagabom (Esquire) · Posted 58 minutes ago
  
  I wonder kind of nuts and bolts they will come up with next? Jim
- The Peckish Synapse
  
  By OnTheReel · Posted 1 hour ago
  
  “It should be recognized, however, that there becomes a point where fuel economy oils do not make much economic sense for the end consumer—we talk about a fuel saving of ~€100 compared to a risk of €1000 Euros if the oil is too thin and causes increased engine wear rates. However, the benefit of these oils accrues to the car manufacturers. If their vehicles can save 1–2% fuel by using a special fuel economy lubricant, then that OEM can drastically reduce the amount of fines they need to pay.” I liked this and the following paragraph as well but it’s really only touching the beginning of the benefits OEMs see from spec’ing these oils. After you factor in “out of warranty” service work and new car sales when these engines fail before their time, it’s a good racket for them. Just because you're paranoid doesn't mean they're not out to get you!
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  By Atlas · Posted 1 hour ago
  
  Too much voodoo and snake oil. Time to go EV 😉
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  By Grumpy Bear · Posted 1 hour ago
  
  SwRI is who the big OEM's go to for this sort of thing. In the above the ring and bore plus valvetrain power is roughly the same for 0W30 to 0W16 but both fall apart in the 0W8. Overall the only looser is bearing friction which Stribeck told us decades ago. There is much to ponder in that reference material. That was a good find @OnTheReel
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