I thought i had a factory posi....
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From: Warrensburg Missouri
I thought i had a factory LSD/posi....
well i just pulled the cover to change the gear oil and it has spider gears not a posi! 
it is a 98 4x4 XLT F150 with towing package! WTF? I have done a few burnouts and both tires spin the hole time and it kicks out sideways. So oh well. Anyway to no from part#'s on the door?
it is a 98 4x4 XLT F150 with towing package! WTF? I have done a few burnouts and both tires spin the hole time and it kicks out sideways. So oh well. Anyway to no from part#'s on the door?
Last edited by Dans4x4F150; Feb 5, 2007 at 02:26 PM.
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From: DFW
https://www.f150online.com/forums/sh...36&postcount=7
Originally Posted by bluejay432000
I bet your next question is "what do the codes mean".
19 = 3.55 open
H9 = 3.55 LSD
26 = 3.73 open
B6 = 3.73 LSD
27 = 3.31 open
18 = 3.08 open
25 = 4.10 open
B5 = 4.10 LSD
19 = 3.55 open
H9 = 3.55 LSD
26 = 3.73 open
B6 = 3.73 LSD
27 = 3.31 open
18 = 3.08 open
25 = 4.10 open
B5 = 4.10 LSD
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From: Warrensburg Missouri
H9 LSD is what it is! guess i just dont no fords that well 
also has a auto E E40d trans f150-f250 is this a good trans?
also has a auto E E40d trans f150-f250 is this a good trans?
Last edited by Dans4x4F150; Feb 5, 2007 at 02:34 PM.
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From: Hampton, VA
Originally Posted by Dans4x4F150
well i just pulled the cover to change the gear oil and it has spider gears not a posi! it is a 98 4x4 XLT F150 with towing package! WTF? I have done a few burnouts and both tires spin the hole time and it kicks out sideways. So oh well. Anyway to no from part#'s on the door?
it is a 98 4x4 XLT F150 with towing package! WTF? I have done a few burnouts and both tires spin the hole time and it kicks out sideways. So oh well. Anyway to no from part#'s on the door?
Thread Starter
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Senior Member
Joined: Dec 2006
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From: Warrensburg Missouri
it say it has 3.55 lsd and it spins both tires everytime! But when i opened it up all i saw as spider gears? LOL i dont no much about fords but oh well! as long as it keep spinning both tires im kool!
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From: NE Ohio
You have a 3.55 Limited Slip Differential (LSD) and there are spider gears in there. The limited slip is different from a locker. There are little clutch disks on the outside of the carrier that make your differential only slip a little! Thus the limited slip.
Also if you changed the gear oil, you may (probably will) experience some chatter when you accelerate, especially around a corner. You'll need to add a tube or two of friction modifier to your diff to smooth things out. --DIY
Also if you changed the gear oil, you may (probably will) experience some chatter when you accelerate, especially around a corner. You'll need to add a tube or two of friction modifier to your diff to smooth things out. --DIY
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From: Warrensburg Missouri
I added the ford friction modifier! but have replaced spider gears in a dodge b4 and it looked just like it. My old chevy had all the clutches in so i no what im looking at LOL! But it is weird! only thing i can think of is that it was on the other side where i couldnt see.
