4.10 Installed...by myself.
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Senior Member
Joined: Oct 2000
Posts: 364
Likes: 0
From: Houston, Tx.
Ok,
Just finished swapping out the gears on the front end, so I am fully functional now. The front is a little tougher than the rear since the whole axle between the CV joints must be removed, so there is more disassembly/assembly work involved. Otherwise the basic gear swap is similar to the rear. I am glad I did this work by myself since I understand much better the mechanics of how the axle/gears/etc work and the pieces involved. I am not afraid of it any more. However, my advice to you is to not do this yourself unless you have lots of time and patience. I will take you at least one full weekend, probably more to do one end. With a 4x4, we are talking two full weekends.
gah,
I really like the change. The acceleration is quicker which is what I was after in the first place. I don't have any good data on change in mpg since I haven't done a highway trip yet. I don't expect the city mpg to change much, but will verify in a couple of days after I fill-up. Looks like the speedometer/odometer recalibration is a problem for now but am still investigating. I am thinking that an approximate fix can be done by having Ford (or a speedo shop w/ the right tools) change the computer setting to 3.73 gears AND a smaller tire size to get close to the same effect as 4.10's. But still need to chase this down.
Y2K 770 4x4
Thanks. Yes, I did check the patterns. The rear was centered face-to flange and was slightly toe on both the drive and coast side. The front was about the same, but slightly centered towards the flange, not bad, otherwise OK. On the rear, a perfectionist probably would have removed a 0.001" to 0.002" shim from the pinion.
GDG
Just finished swapping out the gears on the front end, so I am fully functional now. The front is a little tougher than the rear since the whole axle between the CV joints must be removed, so there is more disassembly/assembly work involved. Otherwise the basic gear swap is similar to the rear. I am glad I did this work by myself since I understand much better the mechanics of how the axle/gears/etc work and the pieces involved. I am not afraid of it any more. However, my advice to you is to not do this yourself unless you have lots of time and patience. I will take you at least one full weekend, probably more to do one end. With a 4x4, we are talking two full weekends.
gah,
I really like the change. The acceleration is quicker which is what I was after in the first place. I don't have any good data on change in mpg since I haven't done a highway trip yet. I don't expect the city mpg to change much, but will verify in a couple of days after I fill-up. Looks like the speedometer/odometer recalibration is a problem for now but am still investigating. I am thinking that an approximate fix can be done by having Ford (or a speedo shop w/ the right tools) change the computer setting to 3.73 gears AND a smaller tire size to get close to the same effect as 4.10's. But still need to chase this down.
Y2K 770 4x4
Thanks. Yes, I did check the patterns. The rear was centered face-to flange and was slightly toe on both the drive and coast side. The front was about the same, but slightly centered towards the flange, not bad, otherwise OK. On the rear, a perfectionist probably would have removed a 0.001" to 0.002" shim from the pinion.
GDG
Senior Member
Joined: Feb 2000
Posts: 1,544
Likes: 0
From: Kalamazoo, MI, USA
Good job!
You put more into adjustment than they do at the plant -- good thing they're fairly 'forgiving'.
Too bad you didn't have some photo's to share -- as the job would serve as a real good tutorial. It's always hardest for a tech-writer to 'remember' what the first-timer experiences -- so that the manual can have all of the right answers for people of all levels of experience with the process.
I've got the 3.73 -- and thought I'd have preferred the 4.10 -- but after doing some towing and living with the thing, I'm fairly convinced that the set-up is nearly perfect for my set-up and load.
I'm interested in your follow-up report.
Regards,
Jim
You put more into adjustment than they do at the plant -- good thing they're fairly 'forgiving'.
Too bad you didn't have some photo's to share -- as the job would serve as a real good tutorial. It's always hardest for a tech-writer to 'remember' what the first-timer experiences -- so that the manual can have all of the right answers for people of all levels of experience with the process.
I've got the 3.73 -- and thought I'd have preferred the 4.10 -- but after doing some towing and living with the thing, I'm fairly convinced that the set-up is nearly perfect for my set-up and load.
I'm interested in your follow-up report.
Regards,
Jim