Sponsored

What rear end is this?

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
I’m just trying to make sure this is the 9.75. I bought 4.56 gears for my previous truck but never installed them. I got the reverse 8.8 fronts as well.

Ford F-150 What rear end is this? IMG_1682
Ford F-150 What rear end is this? IMG_1679
Ford F-150 What rear end is this? IMG_1683
Sponsored

 

SpaceWhiteF150

Well-known member
Joined
Sep 18, 2021
Threads
59
Messages
1,865
Reaction score
969
Location
Montgomery, Texas
Vehicles
2021 F150
I have no input to help but I’m following! What setup are you running that warrants 4.56s?
 

SALEEN961

Well-known member
Joined
Jan 1, 2023
Threads
6
Messages
281
Reaction score
356
Location
Radnor, PA
Vehicles
2021 F150 XLT 302A
Occupation
Automotive Technician
That's a Super 8.8" differential, not to be confused with the previously used 8.8" differential.
 
OP
OP
Lobostang77

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
I have no input to help but I’m following! What setup are you running that warrants 4.56s?
either a Cobra jet or 18+ Mustang GT intake manifold.
 
OP
OP
Lobostang77

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
That's a Super 8.8" differential, not to be confused with the previously used 8.8" differential.
Darn it. Is the front still a reverse 8.8 you think? Now I have to buy just the rear correct?
 

Sponsored

SALEEN961

Well-known member
Joined
Jan 1, 2023
Threads
6
Messages
281
Reaction score
356
Location
Radnor, PA
Vehicles
2021 F150 XLT 302A
Occupation
Automotive Technician
Darn it. Is the front still a reverse 8.8 you think? Now I have to buy just the rear correct?
The front axle is still a reverse 8.8" so everything you bought for the front should work.
 
OP
OP
Lobostang77

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
Did I get this type of rear because my truck has 3.31 gears?
 

brfertig

Well-known member
Joined
Feb 13, 2024
Threads
10
Messages
151
Reaction score
184
Location
United States
Vehicles
2023 F150 XLT 5.0 4X4 ELocker Fox Racing w/35's
Occupation
Sr Project Manager & Investor
I’m just trying to make sure this is the 9.75. I bought 4.56 gears for my previous truck but never installed them. I got the reverse 8.8 fronts as well.

IMG_1679.png
That is an 8.8 but that has nothing to do with those bolts. :) that is just a happy coincidence. Also the 8.8 is an awesome axle and has 34 splines in our truck. The 8.8 is an ISO 898-1 strength rating for the bolt, nothing to do with the 8.8 ring gear in Ford axles.

I have the e locker and if you dont you can add one while doing gears. I setup my own gears from my old Jeep Days. I have the 3.31 gears but the 10 speed is so good I really dont need the 3.73 for towing. It only adds about 1000 lbs of extra towing on my truck.
 

diambo4life

Well-known member
Joined
Dec 31, 2021
Threads
6
Messages
874
Reaction score
921
Location
OKC
Vehicles
2022 Lariat Screw 4x4
Occupation
Assassin
The 9.75 has an assymetric shape looking at it from the same angle this photo was taken.
 
OP
OP
Lobostang77

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
That is an 8.8 but that has nothing to do with those bolts. :) that is just a happy coincidence. Also the 8.8 is an awesome axle and has 34 splines in our truck. The 8.8 is an ISO 898-1 strength rating for the bolt, nothing to do with the 8.8 ring gear in Ford axles.

I have the e locker and if you dont you can add one while doing gears. I setup my own gears from my old Jeep Days. I have the 3.31 gears but the 10 speed is so good I really dont need the 3.73 for towing. It only adds about 1000 lbs of extra towing on my truck.
I’m building a Sport/Street truck so I’m using the gears for off the line fun. But thanks for clarifying even more. Now I have to order the rears again. My truck does come with the e locker.
 

Sponsored


OP
OP
Lobostang77

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
My truck has a 7050 GVWR package. What is that?
 

brfertig

Well-known member
Joined
Feb 13, 2024
Threads
10
Messages
151
Reaction score
184
Location
United States
Vehicles
2023 F150 XLT 5.0 4X4 ELocker Fox Racing w/35's
Occupation
Sr Project Manager & Investor
My truck has a 7050 GVWR package. What is that?

Look at your door sticker, probably the same as mine.

Gross Vehicle Weight meaning you have 7050 max weight. So below that on the tire sticker should say something like 1994 lbs capacity on the chassis, that is how much people and cargo you can cary on the truck itself.

The Gross Combined Weight Rating is 14800 for our trucks. So Subtract our truck weight about 5050 lbs dry weight. You get about 9300 towing capacity. Minus your passengers and cargo you get about 9000lbs capacity towing. If you change the gears to 3.73 or greater it becomes 10000 lbs capacity for towing.

GCWR 14800 lbs for 4x4 supercrew 5.0
CVWR is 7050 lbs
Max towing for equipped trucks is 9300 or 9400 lbs
Curb weight for 4x4 SUper Crew is 5050 lbs
 
OP
OP
Lobostang77

Lobostang77

Member
First Name
Mando
Joined
Feb 14, 2024
Threads
1
Messages
18
Reaction score
3
Location
Houston
Vehicles
2023 F-150 Platinum
Look at your door sticker, probably the same as mine.

Gross Vehicle Weight meaning you have 7050 max weight. So below that on the tire sticker should say something like 1994 lbs capacity on the chassis, that is how much people and cargo you can cary on the truck itself.

The Gross Combined Weight Rating is 14800 for our trucks. So Subtract our truck weight about 5050 lbs dry weight. You get about 9300 towing capacity. Minus your passengers and cargo you get about 9000lbs capacity towing. If you change the gears to 3.73 or greater it becomes 10000 lbs capacity for towing.

GCWR 14800 lbs for 4x4 supercrew 5.0
CVWR is 7050 lbs
Max towing for equipped trucks is 9300 or 9400 lbs
Curb weight for 4x4 SUper Crew is 5050 lbs
Thank you sir. I need to learn this.

p.s. I just ordered the 8.8 rear gears.
Sponsored

 
 




Top