limited or posi?
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limited or posi?
hi ,im changing the rearend in my 94 f150 4x4,the old tag on the original diff says, S838F, 3 55 88 3L17,the tag on the new diff says, 28O7D, 355 88 9D19.my question is,does the letter D mean i have positrac? thnx for any help.
Fleet Owner
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From: Gilbert, PA
Your "old" axle tags states that you have an open 3:55 gear axle w it saying 3 55
The "new" axle tag states the same thing. Just an OPEN axle.
in order to have Limited slip, it must say 3L55
The "new" axle tag states the same thing. Just an OPEN axle.
in order to have Limited slip, it must say 3L55
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ok thnx guys,now the reason im changing rearends is because diff had no oil in it and caused damage.now would it be easier to change just the differential instead of the whole rear end and would the differential guts with tag number 355889D19 take place of the guts from the original rearend with tag number 355883L17,lol guess what im trying to say is that im thinking is taking the back plate off both and exchanging the guts (diff)instead of the whole rearend,anyone know if this will work?will the D19 fit into the L17 housing,thnx again.
Fleet Mechanic
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From: Richland, WA
Are you sure about the tag on the new diff? 28O7D doesn't make since. If it's S807D, then it is a LS 3.55 diff. Ford Axle Identification
Fleet Mechanic
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From: Richland, WA
The ring and pinion gears are machined together, don't mix and match them. If you want to swap the guts you need to change the pinion as well. If you have the whole axle, it would be easier to swap the whole thing than setting up gears.
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well put the new rearend on stands and had to knock pry etc the drums off as they were stuck. anyway when i turn one side,the other side spins the same way and when i spin backwards the other side spins backwards too.does this mean its posi?
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