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Dana 44 & 44HD, Corvette & Viper Eaton Truetrac Limited-Slip Differential 913A614
Eaton Truetrac, Helical Type Limited-Slip Differential

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Price: $1,072.99

Product Code: TT913A614

Description Vehicle Applications

Dana Spicer Model 44 HD
Truetrac Performance Differential

1980-1982 Chevrolet Corvette C3
1985-1996 Chevrolet Corvette C4 with Manual Trans
1992-2002 Dodge Viper

*does not fit models with Hydra-Lok / Vari-Lok rear diff

Differential: Dana 44, IRS Cast-Alum. Hsg.
Gear Ratio: 3.73 & Down, A/M Thick
Axle Splines: 30
Ring Gear Bolts: 10 (not included)
Manufacturer: Eaton
Warranty: 1 Year

Detroit Truetrac Differential
The Detroit Truetrac is a helical-gear style performance differential that maximizes wheel traction and enhances driving and handling characteristics.

The Truetrac operates as a standard or open differential under normal driving conditions, allowing one wheel to spin faster or slower as necessary. When a wheel encounters a loss of traction or the terrain changes, the gear separation forces take effect and transfer torque to the high-traction wheel. The helical-shaped gears mesh with increasing force until wheel spin is slowed or completely stopped. When the vehicle exits the low traction situation, the differential resumes normal operation.

Operation of the Truetrac is smooth, quiet and automatic. The unit will engage without any driver knowledge or action required. It also has no wearable parts and requires no maintenance, meaning less time in the garage and more on the road.

For more information about the Eaton Truetrac read the FAQ Here.

Eaton logo

EATON Performance Differentials.


  • Helical-style pinion gears
  • Limited-slip operation
  • Smooth and automatic engagement - no driver action needed
  • Parts are maintenance free meaning more time on the road
  • Validated performance and durability
Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Eaton TrueTrac June 29, 2017
Reviewer: william Zenkus from seymour, CT United States  
Great Product at a super price!
Received much quicker than expected too!
Sooo glad I found this site before I ordered.

My only disappointment is that I just missed the rebate offer from Eaton - no ones fault just the offer ran until the end of March, and my rear gave out the end of may. Could have used that $70.00 to buy the bearing, shims ans gasket .

Just mentioned the latter so those of you that are looking for rear end parts, don't forget to check for Eaton's latest rebate offers first...

Many thanks to Just Differentials. for their great product and services!

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