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1997 GMC Savanna 3500. Put in reverse to check parking brake…

1997 GMC Savanna 3500...
1997 GMC Savanna 3500 . Put in reverse to check parking brake and heard a loud pop. now no reverse, seems to go forward but scared to drive on road. Any ideas.
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Answered in 5 minutes by:
1/23/2018
Chris (aka-Moose)
Chris (aka-Moose), GMC Technician
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More than likely the rear servo inside the transmission blew out the seals or the rear band that the servo applies has broken. This will mean an overhaul is needed to fix this. As long as all forward gear work you can drive it to a shop to get repaired.

Now that I have posted a partial or complete answer, you will see you can rate me. The deposit you have already paid is not transferred to me until you rate me. I would like to receive nothing less than 5-star excellent ratings. So if we are not there yet, please reply and let me help more. If you're not pleased, let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent replying. Thanks Chris

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Customer reply replied 4 months ago
All I did was apply brake and put in reverse and give it a little gas would do this.

You had a weak part in the transmission and this torque you applied even if minimal. It was enough to finish it off. It would have failed on its own under another circumstance on down the road. You just sped up the process unfortunately accidentally.

Chris (aka-Moose)
Chris (aka-Moose), GMC Technician
Category: GMC
Satisfied Customers: 52,118
Experience: 16 years of experience
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Customer reply replied 4 months ago
thanks

You are welcome

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