Does the front or differentials on the 2006 CRD require any limited slip additives? According to the Amsoil site, they may or may not, I could not find a tag on the rear differential to verify this?

http://www.amsoil.com/mygarage/vehiclel ... +LIBERTY+5

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

Call your dealership with the last 8 or 9 digits of your VIN. They can tell you if you have the rear Trac-Lok axle. If you do, yes it does require limited slip additive.

The front axle does not require any since no limited slips were available for the front end.

I found out by experience that synthetic fluid does NOT work better in the diffs. When I put the cheapest dino oil available into my rear diff, it became butter smooth and much happier.

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2005 Stone White KJ Limited CRD 4x4
Off-Road Pkg
Trac-Lok
Emu 790s/948s
Skyjacker H7088s rear/Bilsteins front
15x7 Black Rock Lobos/31x10.50 Firestones
GDE HOT Tune + TCM Tune
Euro TC
CB radio
Thrush Turbo muffler
AEM DryFlow filter

Don't bother calling anyone
Your 06 has ESP and limited slip was not offered in 06

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

I heard the 06s were all the same, so do I need the additive or not?

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

No you do not need additive for the 06.

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2007 Grand Cherokee CRD, GDE ECO and DPF delete.
2006 CRD Limited, GDE ECO Full TQ and TCM tunes. SOLD

Thanks guys.

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

what about the 05's?

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"Never mind the maneuvers, go straight at "em," Lord Horatio Nelson

2005 Jeep Liberty CRD

If you have a trac-loc on an 05, then yes you need the additive in the rear.

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2006 Liberty CRD Limited

Provent @ 43,000 km
SEGR in progress
SAMCO Sport hoses @ 48500 km
Goodyear Wrangler Duratrac LT225/75R16