Differential work
Thread Starter
|
More Turbo
Joined: Feb 2003
Posts: 532
Likes: 0
From: Grand Rapids, MI
Differential work
Planning to use some bonus money this year to upgrade from my stock open rear end in the '11. Its naturally a Ford 9.75 and I just scooped up a eaton posi (now a discontinued model, but uses clutch packs which share common applications) on a killer deal and I am VERY tempted to try this myself... though common sense and experience are saying otherwise.
I am familiar with the procedure, and have tinkered around on 8.8s in the past, though with limited success. Has anybody swapped their diff before? Were you lucky enough for a plug-and-play install reusing shims? I would replace the carrier bearings/races but I haven't had any issues with my rear and would try to leave everything else intact.
I know its a long shot, but looking for success or failure stories to sway my plans.
I am familiar with the procedure, and have tinkered around on 8.8s in the past, though with limited success. Has anybody swapped their diff before? Were you lucky enough for a plug-and-play install reusing shims? I would replace the carrier bearings/races but I haven't had any issues with my rear and would try to leave everything else intact.
I know its a long shot, but looking for success or failure stories to sway my plans.
Cargo Master
Joined: Feb 2007
Posts: 2,474
Likes: 24
From: ME
Planning to use some bonus money this year to upgrade from my stock open rear end in the '11. Its naturally a Ford 9.75 and I just scooped up a eaton posi (now a discontinued model, but uses clutch packs which share common applications) on a killer deal and I am VERY tempted to try this myself... though common sense and experience are saying otherwise.
I am familiar with the procedure, and have tinkered around on 8.8s in the past, though with limited success. Has anybody swapped their diff before? Were you lucky enough for a plug-and-play install reusing shims? I would replace the carrier bearings/races but I haven't had any issues with my rear and would try to leave everything else intact.
I know its a long shot, but looking for success or failure stories to sway my plans.
I am familiar with the procedure, and have tinkered around on 8.8s in the past, though with limited success. Has anybody swapped their diff before? Were you lucky enough for a plug-and-play install reusing shims? I would replace the carrier bearings/races but I haven't had any issues with my rear and would try to leave everything else intact.
I know its a long shot, but looking for success or failure stories to sway my plans.
Cargo Master
Joined: Feb 2007
Posts: 2,474
Likes: 24
From: ME
You mean the side shims for the carrier?I didn't measure nothing. I put the side shims back in on the same sides they came from and they fit exactly like they fit with the stock carrier.
I used new carrier bearings on the Truetrac because I wanted to leave the carrier bearings on the peg leg/e-locker so I can just slap it back in when I trade the truck in.
Thread Starter
|
More Turbo
Joined: Feb 2003
Posts: 532
Likes: 0
From: Grand Rapids, MI
Well, there are pretty much two measures you need to take. The first is an objective measurement of gear backlash and the second is a subjective "measurement" of the gear mesh pattern using marking compound.
Cargo Master
Joined: Feb 2007
Posts: 2,474
Likes: 24
From: ME
I don't know those measurements. My friend did all that, I was just helping him. He's specialized in differential work for over 30 years. He works for cheap for me so I help. He swapped carriers on 2 of my Grand Nationals, my 2011 F150, my 2014 F150 and added a Truetrac and 4.10's in my Bronco.
New User
Joined: Jan 2008
Posts: 4
Likes: 0
2010 f-150 2wd 5.4 litre has 9.75 with 3:15 ring and pinion Would like to change to a 3:55 ring and pinion for towing purposes. Asked dealer and they told me it could not be done they said transmission was synchronized to differential and changing gears would mess things up. I find this hard to believe. Any opionons on if this can be done
Trending Topics
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 738
From: Isanti, MN
2010 f-150 2wd 5.4 litre has 9.75 with 3:15 ring and pinion Would like to change to a 3:55 ring and pinion for towing purposes. Asked dealer and they told me it could not be done they said transmission was synchronized to differential and changing gears would mess things up. I find this hard to believe. Any opionons on if this can be done
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
crucialprospect
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
21
May 13, 2018 04:00 PM
nomad221
1994.5 - 1997 7.3L Power Stroke Diesel
14
May 29, 2012 01:24 AM
studlybilly
Clutch, Transmission, Differential, Axle & Transfer Case
11
Jul 18, 2004 09:51 AM