Moser 5TT690 Detroit Truetrac Ford 9" Rear -- 35 Spline


Moser 5TT690 Detroit Truetrac Ford 9" Rear -- 35 Spline

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Eaton Detroit Truetrac

Mfg #: 914A690
Application: Ford 9 inch
Ring Gear Diameter: 9.00"
Carrier: All Ratios
Side Gear Spline: 35 Teeth

Requires aftermarket 3.250" Case!

Product Description

•Smooth operation
•Performs open until needed
•Fully automatic limited slip

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.
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.

Moser has changed their website to reflect the Motul gear oil as their recommended fluid for all gear type LSD’s (this includes Truetrac’s). Gear type units require friction to work properly. Most aftermarket oils have additives that helps to alleviate heat, wear and prolong life. In doing so these additives minimize friction causing gear driven units to be less efficient and sometimes fail completely.


Part#                            Description                                   

MUT-100118                 Gear 300 75W90 Synthetic                   

MUT-101161                 Gear Competition 75W140 Synthetic    

Moser 5TT690 Detroit Truetrac Ford 9" Rear -- 35 Spline
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  • Item #: Moser 5TT690
  • Manufacturer: Moser Engineering
  • Condition: New
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Price $585.00
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