Differential Questions HELP
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Differential Questions HELP
I have a 1988 Bronco EB Edition and I need to know what the tag plate numbers mean. (I have been able to figure out some of it). My boyfriend was able to get a complete rearend out of a 94 Bronco that belonged to a buddy of his who lets just say had to send it to the Bronco grave yard a couple of years ago. Well the tag plate was missing and the guy has just shipped out for Iraq.
Well, to make a long story short he just thru it in and I had my Bronco on the road again, but not for long (5 days driving in the city) and you guessed it. Its back on jacks in my garage.
The numbers on the original rearend plate are: S815D 4L10 8 8 6MO3.
I have figured out that the 4L10 is the gear ratio 4.10 with a 8.8" rearend.
What I need to know is will the gears out of another Ford rearend with a ratio of 3.27 8.8" rearend work.
Please help
Thanks,
Queen Bicth
Well, to make a long story short he just thru it in and I had my Bronco on the road again, but not for long (5 days driving in the city) and you guessed it. Its back on jacks in my garage.
The numbers on the original rearend plate are: S815D 4L10 8 8 6MO3.
I have figured out that the 4L10 is the gear ratio 4.10 with a 8.8" rearend.
What I need to know is will the gears out of another Ford rearend with a ratio of 3.27 8.8" rearend work.
Please help
Thanks,
Queen Bicth
Post Fiend
Joined: Jan 2007
Posts: 18,157
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From: Stanton DE
Welcome to FTE
If the gears come out of an 8.8 and your putting them in an 8.8 they should work.
And unless your boyfriend has done this before a couple times I would highly recommend having them professionally installed.
It may cost a little more but if a good shop dose the install they will hold up better in the long run.
If the gears come out of an 8.8 and your putting them in an 8.8 they should work.
And unless your boyfriend has done this before a couple times I would highly recommend having them professionally installed.
It may cost a little more but if a good shop dose the install they will hold up better in the long run.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Everything will work 8.8 to 8.8, but as the member above me pointed out, one doesn't just bolt everything together, otherwise the rear end won't last a week...as you found out. Certain parts must be replaced to set the lash. The most important is the crush sleeve. Best to have someone that has experience do the work. You may find that some/all of the bearings will need replacing, and you'll also need all new seals.
Post Fiend
Joined: Jul 2006
Posts: 6,948
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As far as 8.8's go, that is a decent carrier. The "L" is for the desireable limited slip.
Depending on the year of the donor 8.8 you may run into yoke differences.
This is 4wheel drive right? Are you going to change the front gears too?
What led up to the failure of the existing rear axle? Is it possible to just repair what you have? Even if you get a great deal on a set of gears, that deal will not be so great if you have to spend more money just to get those to work. Might just repair what you have. The labor will be the same.
Depending on the year of the donor 8.8 you may run into yoke differences.
This is 4wheel drive right? Are you going to change the front gears too?
What led up to the failure of the existing rear axle? Is it possible to just repair what you have? Even if you get a great deal on a set of gears, that deal will not be so great if you have to spend more money just to get those to work. Might just repair what you have. The labor will be the same.
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