Click on image to zoom

TCI880007 - TCI Speedometer Driven Gear - GM 76-85 200C, 69-84 375B, 76-79 TH425, 77-84 475, 82-93 700R4, TH400- 34 Tooth, Green, 3.35"L x .305" Shaft x 1.500" Gear Type H

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Pricing: $22.52


The driven gear is located in a removable housing, usually in the tailhousing, of transmissions.

The following formula is very useful when there is no established baseline from which to work, such as replacing a transmission in a vehicle that was purchased without a driveline.

# Drive Teeth x Axle Ratio x Tire Rev. per Mile ÷ 1001 = # Driven Teeth
Tire Rev. per Mile = 20168 ÷ Tire Diameter In Inches

Use with housing number 25512340

Application List



Shipping Information

  • Item Requires Shipping
  • 0.1 lbs.
  • W4.0000” x H2.0000” x L6.0000”

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

  • We don’t just want your business today. We want to EARN your business for LIFE!
  • USA Owned, Operated & Employed
  • Installers & Resellers Click Here to Apply
  • We Specialize In:
    • GM LS Conversions
    • Engine & Trans Combo Kits
    • Unique Ready to Run Engines
  • Have a question?
  • 888-748-4655 Mon-Fri 8AM-6PM EST
  • Click above for 24/7 Live Chat Service.