Weight 8.8 vs. 9.97 rear end?
Senior Member
Joined: Mar 2018
Posts: 101
Likes: 27
From everything I read you can tell the 9.75 from the 8.8 by the number of bolts on the cover. 10 for the 8.8 and 12 for the 9.75, does anyone know if this is true? I have a 5.0 with 3.31 gears and the cover has the 12 bolts, I have been thinking of doing a gearing swap ever since increasing my tire size but couldn't find much for the 8.8, then checked the bolts and can find any combo I want for the 9.75.
it's 8.8" with 3.55 e locker
Senior Member
Joined: Dec 2017
Posts: 3,269
Likes: 1,359
In 2018, the 9.75 axle was only available with the through the Max Tow Package which required the 3.5L EcoBoost Motor and came standard with the 3.55 gears and e-locker. I know it was available on other motors in prior years, but I am not sure what it took to get the axle.
I am curious as to whether it will be available with other motors in 2019 or only the 3.5L EcoBoost Max Tow configuration.
I am curious as to whether it will be available with other motors in 2019 or only the 3.5L EcoBoost Max Tow configuration.
Senior Member
Joined: Dec 2017
Posts: 3,269
Likes: 1,359
From everything I read you can tell the 9.75 from the 8.8 by the number of bolts on the cover. 10 for the 8.8 and 12 for the 9.75, does anyone know if this is true? I have a 5.0 with 3.31 gears and the cover has the 12 bolts, I have been thinking of doing a gearing swap ever since increasing my tire size but couldn't find much for the 8.8, then checked the bolts and can find any combo I want for the 9.75.
Senior Member
Joined: Jun 2018
Posts: 3,003
Likes: 444
My truck doesn't have an axle tag. What happened to an aluminum tag held by one of the bolts? Cheap bastages. Isn't there a build sheet somewhere inside the truck? At any rate, my diff has 12 bolts, so 9.75? I'd like to know out of curiosity. Also about the HD frame. I know it's 3.55ELD because it says on the window sticker, and has the lock switch on the dash.
Member
Joined: Aug 2018
Posts: 62
Likes: 11
My truck doesn't have an axle tag. What happened to an aluminum tag held by one of the bolts? Cheap bastages. Isn't there a build sheet somewhere inside the truck? At any rate, my diff has 12 bolts, so 9.75? I'd like to know out of curiosity. Also about the HD frame. I know it's 3.55ELD because it says on the window sticker, and has the lock switch on the dash.
Senior Member
Joined: Dec 2017
Posts: 3,269
Likes: 1,359
My truck doesn't have an axle tag. What happened to an aluminum tag held by one of the bolts? Cheap bastages. Isn't there a build sheet somewhere inside the truck? At any rate, my diff has 12 bolts, so 9.75? I'd like to know out of curiosity. Also about the HD frame. I know it's 3.55ELD because it says on the window sticker, and has the lock switch on the dash.
9.75
8.8 diff cover
Senior Member
Joined: Apr 2018
Posts: 397
Likes: 116
From everything I read you can tell the 9.75 from the 8.8 by the number of bolts on the cover. 10 for the 8.8 and 12 for the 9.75, does anyone know if this is true? I have a 5.0 with 3.31 gears and the cover has the 12 bolts, I have been thinking of doing a gearing swap ever since increasing my tire size but couldn't find much for the 8.8, then checked the bolts and can find any combo I want for the 9.75.