How do I know if I have L.S. or not? I am installing a LockRight locker and it is not fitting. They don't work on an L.S. Here is the part# on on the diff tag that was attached. S8698
3L55 88 6A04


------------------
97 F150 XLT SuperCab 4.6L 2WD White w/red and blue custom pen striping.

 

From what I've read on this board about the subject, you have a limited slip rear end with 3.55:1 gears. The 3L55 on your tag is what indicates this. Take a look at the below thread for more info or do a search for limited slip or the like for even more.
https://www.f150online.com/f150board...ML/000162.html

------------------
1997 F150 XLT Flareside
4.6, Auto, 3.55, custom catback
Pioneer DEH-305, Alpine 3547, 12" Kicker Comp.

 

If the code on the door says XH9 you have the limited slip if yours say X19 you have a regular axel. Mine is a regular axel I wish I had the limited slip but the 3.55 regular is far better than the standard 3.08 gear.

------------------
2000 F150 XLT Reg. cab
4.6 Triton Engine
4x2 3.55 rear end gear
sliding rear window
automatic keyless entry
white styleside short box

 

Thanks for the answers. I don't know that limited slip is worth the money on a 4x2. I still get pushed sideways, but go forward as well on snow.

Wish I had know this before, but I guess that's part of learning.

 

White Stallion:

The limited slip diff is definately worth the $265.00!! especially with the 4X2. The limited slip (or POSI as GM likes to call it) will help prevent wheel spin in the event that you loose traction on one of the rear wheels. The limited slip differential will sense the "slippage" and through a clutch or spring mechanism, will transfer more torque to the wheel that is not slipping, and will help your traction. Most, if not all 4x2's should have this option. In my opinion, all trucks (including 4X4's) should have some sort of limited slip, differential. With the 5.4 especially, as this engine produces heaps of torque.

Steve

2000 4X4 Lariat SC SB
5.4
Two tone black/silver
All options except LS differential

MODS so far:

-Westin step bars (powder coated matte black)
-Lund bug shield
-Gentex electrochromatic rear view mirror
-Cabin Air Filtration Kit

MODS to come:

-Superchip (of course!!)

-K&N or AirAid air plenum/filter (can't decide yet which one to get)

-Flowmaster Force II exhaust (series 50 SUV with duals out the rear)

-Mickey Thompson Classic 16" wheels with 305/75 BFG AT KO's

-4.10 gears (still thinking about this one ...anyone have any input?)

-LS diff or locker of some sort once they are available..

 

Wildstallion,
What are you gonna do with that locker?
If you are interested in selling it let me know on the board.



------------------
'97 Ford SC 4X4 XLT Off Road pkg., 4.6,A/OD, 3:55, premium sound w/CD chg, Black clct,towing pkg., hvy duty elec. pkg., Bridestone dueler AT's, line X, Flowmaster true duals, chip, K&N air filter, smittybilt stainless nerf bars

 

TSSCS: I would say that all trucks should have a locker which costs about the same as limited slip.

Nickster: I was going to send it back. I would be willing to sell. Let me know your e-mail address.

 

TSSCS: I would say that all trucks should have a locker which costs about the same as limited slip.

Nickster: I was going to send it back. I would be willing to sell. Let me know your e-mail address.

------------------
97 F150 XLT SuperCab 4.6L 2WD, 3.55 L.S., CD changer, K&N Filter Kit, White w/red and blue custom pen striping.

 

hey my door tag says h 9 what does that mean ?i'll check the diff. tag tomorrow

------------------
pacific green 97 f150 4.6l..reg cab flareside ,ROUSH suspention down 3 fr and3.5rear,snug lid,carpeted bed, painted tailight accents,4x4 grill &bumper,k&n,SUPERCHIP(THANX MIKE),ram air kit,valvoline synthetic,accel super stock wires,platinum plus4 plugs,flow master muff,blue halogen bulbs, speed-glo dash,carbon fiber gauge accent,..."#6 sticker!!!!"
STEREO:eclipse head unit ,boston seperates ,orion amp, pioneer amp,2-orion 12's,custom box by me!,sony adjustable crossover,1 farad cap&way to many cd's

 

Roushfan-1: I found out from one of the other people here that H9 stands for a limited slip diff. Click on the link from Tiron.

I have a #88 and #6!

 

thanx !!

------------------
pacific green 97 f150 4.6l..reg cab flareside ,ROUSH suspention down 3 fr and3.5rear,snug lid,carpeted bed, painted tailight accents,4x4 grill &bumper,k&n,SUPERCHIP(THANX MIKE),ram air kit,valvoline synthetic,accel super stock wires,platinum plus4 plugs,flow master muff,blue halogen bulbs, speed-glo dash,carbon fiber gauge accent,..."#6 sticker!!!!"
STEREO:eclipse head unit ,boston seperates ,orion amp, pioneer amp,2-orion 12's,custom box by me!,sony adjustable crossover,1 farad cap&way to many cd's

 

Well, I put my diff back together. Has anyone put a limited slip back together? There is a spring clip that goes between the two side gears and the pinon shaft goes between that clip. I could not get the clip back in. I don't understand why they put it in there. You have c-clips holding the side gears to the axle and the pinion shaft has no play, plus the spider gears go between the side gears. Someone let me know if i'm in trouble.

------------------
97 F150 XLT SuperCab 4.6L 2WD, 3.55 L.S., CD changer, K&N Filter Kit, White w/red and blue custom pen striping.

 

hmustang,
you mentioned that if the sticker says XH9 you have the limited slip if yours say X19 you have a regular axel
(thanks by the way, I didn't know what those codes meant)
My friend has a 96 (the old style) and he checked his and it said 12. Does anybody know how he can tell if he has LS or a reg axle? Or, what the 12 signifies?
Thanks,

------------------
Black 98 F150 XL Sportgroup
2WD 5spd 4.6L Triton V8
Reg. Cab Short Box 3.08
Air, Sliding Rear Window,
Boxliner,

 

Don't woory about the door tags. All you need is the numbers on the diff. cover tag.
You said your number is a 3L55. That means you have a 3.55:1 with Limited slip. If you do not have the "L" (ex. 3 55), then you have the open rear end.

------------------
stock 98 XL, Reg. cab,4.6, Auto, Tow package, 255/70R16 on styled steel wheels,3.55LS, Black with chrome grille and bumpers! MODS: custom stereo by me, building speaker box was a !@#$%. K&N air filter w/ airbox mod, a complete keyless entry system.