Ranger FW 8.8 vs 9.75


Stephonix

New member
Joined
Mar 17, 2015
Messages
8
Reaction score
0
Points
0
Vehicle Year
2001
Make / Model
Mazda
Transmission
Manual
I am in the middle of planning out my SAS for this winter and am having trouble choosing an axle. Eventually I would like to swap a Chevy 5.3L v8 in my ranger and don't want to have to replace the rear axle again when this is done so my thinking was to go ahead and go with a 4.10 l/s 9.75 rear axle and redrill it to the correct bolt pattern as it is essentially just a larger 8.8 with 34 spline shafts, bigger axle shafts, 9.75 inch ring gear and tubes but weighs about 135lbs more than my explorer 8.8 already installed. It is comparable to a D60 in strength. However if I get a FW 8.8 all I need to do is redrill bolt pattern and swap ring, pinion and diff. Any thoughts or suggestions? I know both axles are overkill for my 3.0 but again do not want to be swapping axles again in the future.
 


Rock Auto 5% Discount Code: CFB3B5F7F32B37 Expires: March 30, 2020

adsm08

Senior Master Grease Monkey
Supporting Member
Ford Technician
TRS 20th Anniversary
Joined
Sep 20, 2009
Messages
32,620
Reaction score
1,932
Points
113
Location
Dillsburg PA
Vehicle Year
1987
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Tire Size
31X10.50X15
Well there isn't any real strength difference between the Explorer 8.8 and the F-150 8.8, so if you are going to swap anything put a 9.75 in it.
 

85_Ranger4x4

Forum Staff Member
Forum Moderator
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
TRS 20th Anniversary
Joined
Aug 7, 2007
Messages
21,555
Reaction score
2,265
Points
113
Location
SW Iowa
Vehicle Year
1985
Make / Model
Ford
Engine Size
5.0
Transmission
Manual
The 9.75 is strong, but for gearing and locker choices either a 8.8 or a D60 will beat the tar out of it.

Will have to redrill the bolt pattern, F-150 wheels of that vintage are hub centric so you might run into issues with your rims fitting over the locating ring on the flange too.
 

4x4junkie

Forum Staff Member
Forum Moderator
TRS 20th Anniversary
Joined
Aug 19, 2001
Messages
10,364
Reaction score
245
Points
63
Location
So. Calif (SFV)
Vehicle Year
1990
Make / Model
Bronco II
Engine Type
2.9 V6
Engine Size
2.9L V6
Transmission
Manual
2WD / 4WD
4WD
Tire Size
35x12.50R15
The ARB Air Locker, Detroit Locker and gears down to 5.13:1 are all available for the 9.75". What else is needed? :D
 

alwaysFlOoReD

Forum Staff Member
Forum Moderator
TRS Banner 2012-2015
TRS 20th Anniversary
Joined
Apr 13, 2009
Messages
10,071
Reaction score
1,143
Points
113
Location
Red Deer, Canada
Vehicle Year
'91, '94, '80
Make / Model
Ford, GMC
Engine Size
4.0,4.0,350
Transmission
Manual
I'm not familiar with any of the options other than the 8.8. What is the clearance from ground to bottom of the pumpkin of these rear ends? That may be worth a thought.
 

85_Ranger4x4

Forum Staff Member
Forum Moderator
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
TRS 20th Anniversary
Joined
Aug 7, 2007
Messages
21,555
Reaction score
2,265
Points
113
Location
SW Iowa
Vehicle Year
1985
Make / Model
Ford
Engine Size
5.0
Transmission
Manual
The ARB Air Locker, Detroit Locker and gears down to 5.13:1 are all available for the 9.75". What else is needed? :D
Not nearly as easy to find stuff for as a 8.8.

My brother regeared his F-150 (8.8 rear) the about the same time I did mine (9.75). He had a ton more options for gears (like Ford Racing) and I guess I was mainly shopping for limited slips... which at least four years ago were pretty limited.

The reverse rotation 8.8 in the front was about comparable with the 9.75 with gearing vender options. :annoyed:

I ended up with Motive 3.73 gears front and rear and just left the rear carrier open.

I'm not familiar with any of the options other than the 8.8. What is the clearance from ground to bottom of the pumpkin of these rear ends? That may be worth a thought.
I can measure mine if anyone needs to know. They are pretty big but look bigger yet because they have gussets on the sides of the diff compared to a 8.8.
 
Last edited:


Top