1998 GMC Sierra number

Tiny
RICHARDJAY
  • MEMBER
  • 1998 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 112,456 MILES
Where can I find the number to know if it a 350 or 400trubo?I going to change the ringgear, I think that what its call.
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Wednesday, April 14th, 2010 AT 6:44 PM

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Tiny
FACTORYJACK
  • EXPERT
In 1998, and speaking of transmissions, you had no turbo 350 or 400. The transmissions in a 98 Sierra would be 4L60E(1500 series), or 4L80E(2500/3500). You want to change a ring gear, are you perhaps talking about the rear differential ring and pinion? The only other ring gear would be flexplate/flywheel ring gear, and it is usually changed as an assembly, fleaxplate for auto, flywheel for manual trans.
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Wednesday, April 14th, 2010 AT 9:25 PM

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