Mack RD688 Axles &amp; Differentials For Sale

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1990 Mack RD688S Front Axle Assembly

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TAG MISSING PASSENGER SIDE KING PIN BAD, Hub Bolts: BUD

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	RD688S
Will Fit Year(s)	1990
Stock Number	008579-3
MLS Number	10639716
Category	Axle Assemblies, Front
Last Updated	5/14/2026
Location	Farr West, UT, US
Sold By	Rocky Mountain Truck Parts

(855) 624-___ SHOW
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1997 Mack RD688S Front Axle Assembly

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SPINDLES OK,, Capacity: 18,000LBS, Axle Make: MACK

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	RD688S
Will Fit Year(s)	1997
Capacity	18,000LBS
Stock Number	1515-MACK-2
MLS Number	13338787
Category	Axle Assemblies, Front
Last Updated	5/13/2026
Location	STURGEON COUNTY, AB, Canada
Sold By	Badger Truck Parts Ltd.

(844) 402-___ SHOW
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2000 Mack RD688SX Front Axle Assembly

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(Used) 2000 Mack RD688SX, COMPLETE FRONT AXLE- Make: Mack, Model: 3QHF545-P2, Serial Number: 1QHAFA, Hub Bolts: 6 Brake Type: Drum, For more information about this item, give us a call.We...

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	RD688SX
Will Fit Year(s)	2000
Stock Number	P-46345
MLS Number	12019931
Category	Axle Assemblies, Front
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

(844) 402-___ SHOW
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2001 Mack RD688S Left Spindle

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(Used) 2001 Mack RD688S, COMPLETE SPINDLE KNUCKLE- Side: Driver Left Side, Material: Steel, Make: Mack, Model: 3QHF545-P2, Capacity: 18,000 Lbs, Hub Bolts: 10, Brake Type: Drum, For more...

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	RD688S
Will Fit Year(s)	2001
Side	LEFT
Capacity	18,000 lbs.
Stock Number	P-56055
MLS Number	12234344
Category	Spindles / Knuckles
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

(844) 641-___ SHOW
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2000 Mack RD688S Front Axle Assembly

$2,000 USD

20K FRONT WITH BUD WHEELS DOUBLE STEERING BOX

Condition	Used
Fits To Make(s)	MACK
Fits To Model(s)	RD688S
Stock Number	12335
MLS Number	14110904
Category	Axle Assemblies, Front
Last Updated	2/14/2026
Location	Morrisville, NY, US
Sold By	Dutcher's Inc.

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1996 Mack RD688S Front Axle Assembly

$1,800 USD

20K FRONT BEAM DUAL STEERING 6 SPOKE HUB

Condition	Used
Fits To Make(s)	MACK
Fits To Model(s)	RD688S
Stock Number	1601
MLS Number	10569734
Category	Axle Assemblies, Front
Last Updated	2/8/2025
Location	Morrisville, NY, US
Sold By	Dutcher's Inc.

(833) 359-___ SHOW
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1994 Mack RD688S Front Axle Assembly

$2,000 USD

USED MACK FRONT STEERING AXLE BEAM OUT OF A RD688S-# 3QH482AP4/18/20,000LB

Condition	Used
Fits To Make(s)	MACK
Fits To Model(s)	RD688S
Stock Number	93861
MLS Number	12837758
Category	Axle Assemblies, Front
Last Updated	12/21/2024
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

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1996 Mack RD688S Front Axle Assembly

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3QHF545 P2

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	RD688S
Will Fit Year(s)	1996
Stock Number	029089-3
MLS Number	9389518
Category	Axle Assemblies, Front
Last Updated	5/14/2026
Location	Farr West, UT, US
Sold By	Rocky Mountain Truck Parts

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1986 Mack RD688S Front Axle Assembly

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18,000LBS, NO SPINDLES, 4 LEAFS, 3 1/2", 6 SPOKE DAYTON HUBS,, Axle Make: MACK

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	RD688S
Will Fit Year(s)	1986
Stock Number	2794-MACK-11
MLS Number	13341178
Category	Axle Assemblies, Front
Last Updated	5/13/2026
Location	STURGEON COUNTY, AB, Canada
Sold By	Badger Truck Parts Ltd.

(844) 641-___ SHOW
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2001 Mack RD688S Front Axle Assembly

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Condition	Used
Fits To Make(s)	MACK
Fits To Model(s)	RD688S
Stock Number	8645
MLS Number	11681984
Category	Axle Assemblies, Front
Last Updated	2/9/2025
Location	Morrisville, NY, US
Sold By	Dutcher's Inc.