I would like this thread to stay focused on the installation of an Eaton Truetrac 913A477 differential. If you contribute, please do not speculate about the merits of LSD, or weather one should use a locker or other type differential. I would like this post only to list descriptions, P/Ns, supporting kits and results of forum members who have installed, or are about to install a Torsen type differential. (I read all the postings to date and they are all filled with conjectures, opinions and side-bar discussions, that make if difficult for anyone to quickly determine what they need to install LSD in their transit.)
Ford 9.75" Eaton Detroit TrueTrac | 34 Spline - 2017 street price - $539.99
- P/N 913A477
- Requires: 1.370" diameter 34 spline axles.
- Type LSD: Torsen
- Torque Bias Ratio: 3.5:1
- Cover = 12 bolt
- Pinion nut: 1-1/8
- Fits all OEM Transit gear ratios
This differential is installed the most in 2011-2017 Ford F150s with 9.75 rear ends.
Other rebuild kits that may be needed for installation, depending on mileage of van.
Crush sleeve and Master bearing kit
Example: Yukon Gear Bearing kit BK F9.75-D
To help stiffen up the pumpkin, F-150 forums recommend that you replace the steel cover with an aluminum girdle cover: Such as a Yukon YP C3-F9.75 - Street price around $200.
(This type of cover has bolts in the cover that secure to the bearing caps to add additional stiffiness.)
There is also an "Axle Crush Sleeve Eliminator Kit" available. (Anyone use one of these?)
Enjoy.
Ford 9.75" Eaton Detroit TrueTrac | 34 Spline - 2017 street price - $539.99
- P/N 913A477
- Requires: 1.370" diameter 34 spline axles.
- Type LSD: Torsen
- Torque Bias Ratio: 3.5:1
- Cover = 12 bolt
- Pinion nut: 1-1/8
- Fits all OEM Transit gear ratios
This differential is installed the most in 2011-2017 Ford F150s with 9.75 rear ends.
Other rebuild kits that may be needed for installation, depending on mileage of van.
Crush sleeve and Master bearing kit
Example: Yukon Gear Bearing kit BK F9.75-D
To help stiffen up the pumpkin, F-150 forums recommend that you replace the steel cover with an aluminum girdle cover: Such as a Yukon YP C3-F9.75 - Street price around $200.
(This type of cover has bolts in the cover that secure to the bearing caps to add additional stiffiness.)
There is also an "Axle Crush Sleeve Eliminator Kit" available. (Anyone use one of these?)
Enjoy.