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1997 GMC Sierra transmission upgrade.

Tiny
ASHINHURST
  • MEMBER
  • 1997 GMC SIERRA
  • 103,000 MILES
A local mechanic told my my transmission is going out and needs replaced. I think my truck has the 4L60E transmission. Can I upgrade to a 4L70E or 4L80E? Is this a difficult and costly upgrade? Or should I beef up the transmission I currently have? Any information would be great.
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Sunday, September 8th, 2013 AT 5:05 AM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
I would just the standard transmission, not sure if you can use the other transmissions, the main thing you want to do is add a quality external oil cooler as this will help reduce temp stress on the trans and this is one of the main things that kill transmissions.
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Sunday, September 8th, 2013 AT 5:25 AM

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