So can I use this if I have a noisy diff but a non limited slip?

No, for a noisy diff I would look at a Lucas oil...after you have checked to make sure the noise isn't being caused by the bad news fairy. Take it to tech and have them check the gears. Or crack it open yourself and look for metal shavings.

does my 2005 4.6L lincoln town car use this? cant find any info

IF your Town Car has a limited slip differential then this fluid is indeed the proper additive if you are going to be renewing the gear oil in your T C.

can this be used on my 1997 awd mercury mountaineer

This is used for a clutch type rear end?

must I change differential oil before adding or can I add to oil already in it?

You could add it to the oil that's already in there but you may need to remove some oil to make room. BTW, Diff oil should be changed at 100K.

Genuine Ford Xl 3 Friction Modifier Additive 4 Oz

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€ 65.58

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In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Drive Quiet, Drive Confident: The Secret to Smooth Gears

SILENCE THE DRIVE - Reduces limited slip differential chatter for a smoother, quieter ride
OEM TRUSTED FORMULA - Genuine Ford additive designed to meet exact manufacturer specifications
MAXIMIZE GEAR LONGEVITY - Lowers surface friction to extend differential and lubricant life
ENGINEERED FOR EXCELLENCE - Formulated specifically for hypoid gears to minimize noise and wear
EASY PRECISION APPLICATION - Tapered neck applicator ensures mess-free, targeted use every time

The Genuine Ford XL-3 Friction Modifier Additive is a 4 oz precision formula designed to reduce chatter and hypoid gear noise in specific limited slip differentials. Featuring a tapered neck applicator for easy, accurate application, this OEM-approved additive lowers surface friction in lubricants, enhancing gear performance and longevity while ensuring a quieter, smoother driving experience.

Reviews

M**D

وصل سريعا وريحة قويه مزعجة

اكيد انه الاصلي من ريحته اشعر ان الرائحة مخزنه من ايام هنري فورد وتم اخراجها لكي نستخدمها من ايام الابيض والاسود معتقه شكرا أمازون. دائما يختار لنا المنتج الاصلي الموصى به من الشركة الام

17.01.2025

A**R

Great product

26.01.2026

B**N

Well it's good and it's stinky!

26.09.2024

B**E

A must for limited slip differential

4.11.2025

H**R

Works great. Smells terrible

18.11.2025

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€ 65.58

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Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

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Manufacturer	Rain-X
Brand	Ford
Model	XL-3
Item model number	XL-3
Is Discontinued By Manufacturer	No
Exterior	Painted
OEM Part Number	0, XL-3, XL3
Item Weight	113 g

Genuine Ford XL-3 Friction Modifier Additive - 4 oz

Description

Specifications

Reviews

Common Questions