USA Standard Gear

1970-1988 Duramax USA Standard Gear & Install Kit for Dana Spicer 60 & GM 14 Bolt 4.88 Ratio (ZGK020)

Quote required Transmission / Drivetrain · Duramax · Supplied through Dirty Diesel Customs
Stock checked before fulfillmentSpecial orderCore reviewInstall recommendedQuote-firstStreet-use review before fulfillment
1970-1988 Duramax USA Standard Gear & Install Kit for Dana Spicer 60 & GM 14 Bolt 4.88 Ratio (ZGK020) official supplier product photo

Checkout path with Rankin review

USA Standard Gear transmission / drivetrain listing sourced for catalog-backed Rankin performance catalog depth.

  • Fitment: Duramax applications; confirm submodel/options before fulfillment
  • Intent: Quote first
  • Supplier SKU: ZGK020
  • Final price, lead time, compliance and install scope are confirmed before parts move.
  • Possible supplier core charge or return. Rankin confirms core amount, return window, condition rules, return shipping and credit path before parts are ordered or fulfilled.

Load cart for review View live product details

What Rankin checks before fulfillment

Vehicle fitmentYear, trim, engine, transmission, current mods and exact supporting parts are reviewed before parts move.
AvailabilityRankin confirms current supplier availability, supersession, MAP limits, lead time, pickup or shipping path.
Install and tuning contextWhen the part affects fuel, boost, exhaust, driveline or calibration, Rankin checks the supporting plan first.
Compliance and returnsStreet/off-road notes, special-order limits, electrical items, opened packaging, core-return requirements and warranty route are clarified before fulfillment. Read the policy.