Traction Concepts LSD conversion kit installed in my 2014 SHO 6F55 AWD front differential! The welded diff is coming out!
Thanks to Brian A.K.A. @Bluezone for coming across this product for our GM cousin the 6T70/75 transmission. There are numerous similarities between our transmissions especially since it’s design was a GM/Ford tag team of sorts. Not enough information can be obtained from looking at pictures alone, I found and bought a GM 6T70/75 front diff on EBay. And boy was I excited to verify with digital calipers that the housing, axle and spider gears, as well as the shaft pin were all the same dimensions including the spacing!
After verifying the dimensions I purchased the LSD kit. https://www.tractionconcepts.com/Chevy-Impala-LTZ-6T70-HD-Upgrade-LSD-Kit-p/tcxchg5323.htm First offered as is without a heavy duty option, I learned after I received the LSD kit that they had a light duty and heavy duty version. Light duty springs were good for 300-350hp or so and the heavy duty springs for up to 600hp+ applications. I quickly contacted Traction Concepts and found I had the light duty springs (Red) in color and they sent me their heavy duty upgrade (green) springs and I swapped them out using a vice and a heavy heart as it’s like a small fragment grenade! Edit: Traction Concepts corrected me on this. They have several spring rates and applications. From 250-350hp, 350-550hp, 550-600+hp and even 1000+Hp applications. The color can change and red doesn’t automatically mean “Light Duty” and green doesn’t mean it’s automatically “Heavy Duty”. They prefer you to consult with them on your HP goals and needs to get the appropriate spring rates.
Next part and most important was determining how much material to remove from the axle and spider gears. Using the GM diff as my guide, I came up with these numbers and all work was performed at a local machine shop. The kit does come with directions and states you could use a bench grinder but @aaron240 and @Ecoboost_xsport strongly advised me not to use a bench grinder. They were both very helpful with input and recommendations. It took some back and forth with the machine shop and gears but this is the cheat sheet of results needed.
And evidently I let the cat out of the bag with Traction Concepts regarding their GM kit actually being in a Ford 6F55 diff and explained that initially I didn’t disclose that for fear of resistance and they love it, this is what they do and they want to find more applications for their products. Their online support (email correspondence) has far exceeded my expectations.
As much as I thought I was in the clear with getting this installed, I hit a snag with the shaft pin passing through the LSD kit. Traction Concepts informed me to release the side brackets, allowing the LSD to open slightly and send the shaft pin through. Unfortunately I still hit a little, causing no damage to the shaft pin and only causing minor cosmetic damage to the radius of the LSD kit. But after using a Dremel sand barrel to smooth it out, I actually found that I was able to pass the shaft pin through the LSD kit. Of which final assembly was a breeze, allowing the shaft pin and coder pin of the diff to be fully reinstalled “prior” to pulling off the side brackets.
Full install video filmed just need to edit it. Also still waiting on Traction Concepts to verify adding our specific Ford Ecoboost AWD SHO, Flex, Explorer, Edge and MKS LSD Conversion Kit to their website! Stay tuned for that and the install video!
Thanks to Brian A.K.A. @Bluezone for coming across this product for our GM cousin the 6T70/75 transmission. There are numerous similarities between our transmissions especially since it’s design was a GM/Ford tag team of sorts. Not enough information can be obtained from looking at pictures alone, I found and bought a GM 6T70/75 front diff on EBay. And boy was I excited to verify with digital calipers that the housing, axle and spider gears, as well as the shaft pin were all the same dimensions including the spacing!
After verifying the dimensions I purchased the LSD kit. https://www.tractionconcepts.com/Chevy-Impala-LTZ-6T70-HD-Upgrade-LSD-Kit-p/tcxchg5323.htm First offered as is without a heavy duty option, I learned after I received the LSD kit that they had a light duty and heavy duty version. Light duty springs were good for 300-350hp or so and the heavy duty springs for up to 600hp+ applications. I quickly contacted Traction Concepts and found I had the light duty springs (Red) in color and they sent me their heavy duty upgrade (green) springs and I swapped them out using a vice and a heavy heart as it’s like a small fragment grenade! Edit: Traction Concepts corrected me on this. They have several spring rates and applications. From 250-350hp, 350-550hp, 550-600+hp and even 1000+Hp applications. The color can change and red doesn’t automatically mean “Light Duty” and green doesn’t mean it’s automatically “Heavy Duty”. They prefer you to consult with them on your HP goals and needs to get the appropriate spring rates.
Next part and most important was determining how much material to remove from the axle and spider gears. Using the GM diff as my guide, I came up with these numbers and all work was performed at a local machine shop. The kit does come with directions and states you could use a bench grinder but @aaron240 and @Ecoboost_xsport strongly advised me not to use a bench grinder. They were both very helpful with input and recommendations. It took some back and forth with the machine shop and gears but this is the cheat sheet of results needed.
And evidently I let the cat out of the bag with Traction Concepts regarding their GM kit actually being in a Ford 6F55 diff and explained that initially I didn’t disclose that for fear of resistance and they love it, this is what they do and they want to find more applications for their products. Their online support (email correspondence) has far exceeded my expectations.
As much as I thought I was in the clear with getting this installed, I hit a snag with the shaft pin passing through the LSD kit. Traction Concepts informed me to release the side brackets, allowing the LSD to open slightly and send the shaft pin through. Unfortunately I still hit a little, causing no damage to the shaft pin and only causing minor cosmetic damage to the radius of the LSD kit. But after using a Dremel sand barrel to smooth it out, I actually found that I was able to pass the shaft pin through the LSD kit. Of which final assembly was a breeze, allowing the shaft pin and coder pin of the diff to be fully reinstalled “prior” to pulling off the side brackets.
Full install video filmed just need to edit it. Also still waiting on Traction Concepts to verify adding our specific Ford Ecoboost AWD SHO, Flex, Explorer, Edge and MKS LSD Conversion Kit to their website! Stay tuned for that and the install video!
Last edited:
