912A557 Detroit Truetrac Limited Slip GM 8.5" Front 28 Spline 2.73-5.13 Ratios
APPLICATION: GM 8.5" 28 SPLINE FRONT 2.73-5.13
AXLE PLACEMENT: FRONT
AXLE SPLINE COUNT:28
SPLINE DIAMETER:1.20"
COVER: 10 BOLT
GEAR RATIO: 2.73 THRU 5.13
MODEL:GM 8.5"
RING GEAR DIAMETER:8.5"
NOTES: GM 8.5" 28 SPLINE FRONT ONLY 1977-1988' K5 BLAZER K10 1/2 TON PICKUP K20 3/4 TON PICKUP SUBURBAN 1/2 TON SUBURBAN 3/4 TON

Package deals available featuring OE gear sets from AAM American Axle and Dana Spicer as well as aftermarket sets from Dana SVL and Yukon brand ring and pinion gear sets. Timken or Koyo master bearing installation kits available also. Give us a call or email us for a package for your application.
The Eaton Detroit Truetrac limited slip differential is a helical gear driven limited slip. The Truetrac is a sealed "no maintenance" unit, the unit does not require limited slip additive or adjustments and does not have clutches to wear out like a standard factory posi unit. Durable, quiet and smooth operation and engagement.

EATON/DETROIT DIFFERENTIALS APPLICATION CATALOG


Detroit Truetrac Differentials The Detroit Truetrac was the first helical gear differential ever introduced into the automotive aftermarket as an Eaton brand. It remains the leading helical gear-type limited slip differential in the industry. Detroit Truetrac's proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction recognized not only for its toughness, but its smooth and quiet operation as well. Proven design, low cost and effective performance all make the Detroit Truetrac limited slip differential the ideal choice for a wide variety of vehicle applications. No maintenance - Just Traction.