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WebbHome / Catalog / Suspension / Shocks
Monroe
Part number 66109
Monroe Magnum 66109 is a cab shock absorber with LS77 upper and LS77 lower mounting codes and a listed dust shield.
Confirm the exact application and configuration before selecting this part. Reference numbers and similar configurations do not guarantee interchange.
| Part number / SKU | 66109 |
|---|---|
| Brand | Monroe |
| Department | Suspension |
| Part type | Shocks |
| Upper end code | LS77 |
| Lower end code | LS77 |
| Compressed length | 8 in |
| Extended length | 9.38 in |
| Travel | 1.38 in |
| Manufacturer product family | Magnum Cab ShockConditions / detailsExact 2023 catalog row; product family does not establish vehicle fitment. |
| Dust shield | YesConditions / detailsAs listed in the exact 2023 mounting-table row. |
| Upper end code | LS77Conditions / detailsMount code is not a separate complete-shock cross reference. |
| Upper mount sleeve inside diameter | 1/2 inConditions / detailsExact LS77 bushing-and-sleeve mounting sleeve dimension. Do not interchange shocks based only on mount size. |
| Upper mount sleeve overall length | 2 7/16 inConditions / detailsExact LS77 sleeve dimension, not the overall shock length. |
| Lower end code | LS77Conditions / detailsMount code is not a separate complete-shock cross reference. |
| Lower mount sleeve inside diameter | 1/2 inConditions / detailsExact LS77 bushing-and-sleeve mounting sleeve dimension. Do not interchange shocks based only on mount size. |
| Lower mount sleeve overall length | 2 7/16 inConditions / detailsExact LS77 sleeve dimension, not the overall shock length. |
| Length measurement reference | Center of loop to center of loopConditions / detailsThe mounting guide measures loop mounts at their centers. All listed end codes here are loop types; do not apply the separate stem-bracket allowance. |
Need a measurement or technical specification? Ask our parts team before choosing the part.
| Brand / reference type | Part number | Notes |
|---|---|---|
| AUTOMANN | A83048 | manufacturer-listed-directed-interchange. |
| BULLDOG HD | HD12140554 | manufacturer-listed-directed-interchange. |
| FCS | F347214 | manufacturer-listed-directed-interchange. |
| GABRIEL | 83048 | manufacturer-listed-directed-interchange. |
| GENERAL MOTORS | 3919939 |
These source-qualified listings are not a fitment guarantee. Confirm the engine, OE number, installed equipment, mounting/configuration and VIN before selecting a part. Missing years or models have not been verified.
| Make | Model | Years |
|---|---|---|
| Volvo/White | /GMC VAH; 2011-2018; 430 Models w/ 42" Sleeper; position: cab; match catalog OEM number 20721254, 22662224. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2018-11 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. Original source conditionsVolvo/White/GMC VAH; 2011-2018; 430 Models w/ 42" Sleeper; position: cab; match catalog OEM number 20721254, 22662224. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2018-11 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. | Not stated |
| Volvo/White | /GMC VHD; 2001-2009; Models w/ OEM Part Number; position: cab; match catalog OEM number 20704334, 22662125. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2009-01 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. |
www.monroeheavyduty.com — Source document cited for this item. Confirm the exact article and source restrictions; not a complete application or interchange approval.
www.monroeheavyduty.com — Source document cited for this item. Confirm the exact article and source restrictions; not a complete application or interchange approval.
www.monroeheavyduty.com — Source document cited for this item. Confirm the exact article and source restrictions; not a complete application or interchange approval.
www.monroeheavyduty.com — Source document cited for this item. Confirm the exact article and source restrictions; not a complete application or interchange approval.
Monroe Magnum 66109 is a cab shock absorber with LS77 upper and LS77 lower mounting codes and a listed dust shield.
Exact 2023 catalog row; product family does not establish vehicle fitment.
As listed in the exact 2023 mounting-table row.
Mount code is not a separate complete-shock cross reference.
Exact LS77 bushing-and-sleeve mounting sleeve dimension. Do not interchange shocks based only on mount size.
Exact LS77 sleeve dimension, not the overall shock length.
The mounting guide measures loop mounts at their centers. All listed end codes here are loop types; do not apply the separate stem-bracket allowance.
2018 owning chart remains linked from current manufacturer resources; confirm current stocked revision and all application years before publication.
Manufacturer interchange catalog is being recorded separately. No cross-reference closure or shared-number equivalence is inferred.
No engine-specific coverage or currently supplied shock revision is established by these historical 2023 tables.
Horizontal and vertical VN cab positions are not selectable replacement alternatives; no variant link is created.
Public attachment requires independent source review and separate human approval.
Physical stocked package/revision and current exact suspension/application constraints remain held. Independent QA and human/public approval required.
Prior 2018 source facts are not modified or approved. This distinct 2023 interchange has no dimensional/application transfer.
No source-backed variants recorded yet; not proof that none exist.
Independent content review and explicit human approval remain required before public attachment.
This newly authored description requires separate independent prose/source review and explicit root registration; no public, physical-stock, package, fitment or interchange approval.
Exact owner only. Full engineering/reference tables and all prior identity, fitment, package, condition, safety and revision qualifiers remain unchanged. No new supplied-package inspection, OEM fitment, universal interchange, publication approval or product completion. Historical 2023 manufacturer table, exact own row and family heading. Codes remain codes; no dimension is decoded from them. No rounded value correction or unprinted global inch unit is introduced. Dust Shield Yes is a catalogue construction entry, not package-inspection proof. 2023 Monroe mounting/length chart. Upper/lower codes and Dust Shield Yes are printed catalogue entries; unprinted global length units and physical stock package condition are not established. Exact attributed manufacturer catalogue context only; not physical-stock inspection, supplied condition, package contents or installed fit approval. All earlier identity, material, source, revision, stock and fitment holds remain. No inverse/transitive interchange or counterpart-property transfer. Overall research is not complete.
Online ordering is coming soon. Contact our team about this part; listings do not confirm stock.
Contact us to confirm current availability and shipping options for this part.
More Shocks
| GENERAL MOTORS | 20704334 | manufacturer-listed-directed-interchange. |
|---|
| GENERAL MOTORS | 20721254 | manufacturer-listed-directed-interchange. |
|---|
| GENERAL MOTORS | 21391412 | manufacturer-listed-directed-interchange. |
|---|
| GENERAL MOTORS | 22662125 | manufacturer-listed-directed-interchange. |
|---|
| GENERAL MOTORS | RCSA3048 | manufacturer-listed-directed-interchange. |
|---|
| GENERAL MOTORS | SA3048 | manufacturer-listed-directed-interchange. |
|---|
| HALDEX | SA66109 | manufacturer-listed-directed-interchange. |
|---|
| INTERNATIONAL | AMS66109 | manufacturer-listed-directed-interchange. |
|---|
| MERITOR | M83048 | manufacturer-listed-directed-interchange. |
|---|
| MONROE SHOCKS & STRUTS | 11938 | manufacturer-listed-directed-interchange. |
|---|
| NAPA SHOCKS | 66109 | manufacturer-listed-directed-interchange. |
|---|
| SACHS | 317531 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | 20704334 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | 20721254 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | 21391412 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | 22662125 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | 83176194 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | RCSA3048 | manufacturer-listed-directed-interchange. |
|---|
| VOLVO | SA3048 | manufacturer-listed-directed-interchange. |
|---|
| WHITE TRUCK | 20704334 | manufacturer-listed-directed-interchange. |
|---|
| WHITE TRUCK | 20721254 | manufacturer-listed-directed-interchange. |
|---|
| WHITE TRUCK | 21391412 | manufacturer-listed-directed-interchange. |
|---|
Reference numbers alone do not guarantee fit. Confirm the exact application.
Volvo/White/GMC VHD; 2001-2009; Models w/ OEM Part Number; position: cab; match catalog OEM number 20704334, 22662125.
2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2009-01 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated.
| Not stated |
| Volvo/White | /GMC VN Series; 1998-2013; VN Series (Cab Shock) - Vertical; position: cab / vertical; match catalog OEM number 8078545, 20496215, 20624915, 20704334, 20721254, 21368413, 22662125. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2013-98 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. Original source conditionsVolvo/White/GMC VN Series; 1998-2013; VN Series (Cab Shock) - Vertical; position: cab / vertical; match catalog OEM number 8078545, 20496215, 20624915, 20704334, 20721254, 21368413, 22662125. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2013-98 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. | Not stated |
|---|
| Volvo/White | /GMC VNL; 2000-2020; Models (Cab Shock) w/ OEM Part Number; position: cab; match catalog OEM number 21391412, 20704334, 20721254, 21368413, 22662125. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2020-00 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. Original source conditionsVolvo/White/GMC VNL; 2000-2020; Models (Cab Shock) w/ OEM Part Number; position: cab; match catalog OEM number 21391412, 20704334, 20721254, 21368413, 22662125. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2020-00 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. | Not stated |
|---|
| Volvo/White | /GMC VNM; 2000-2018; Models w/ OEM Part Number; position: cab; match catalog OEM number 21391412. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2018-00 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. Original source conditionsVolvo/White/GMC VNM; 2000-2018; Models w/ OEM Part Number; position: cab; match catalog OEM number 21391412. 2023 manufacturer application-catalog entry only. Confirm the installed OE number, axle or cab position, suspension and any listed axle-load restriction before selection; this does not cover every configuration of the named truck. Source year notation 2018-00 is preserved in the raw record; no coverage beyond that range is inferred. Only OEM numbers horizontally aligned to this exact Monroe number are retained. Adjacent rows, other shock positions and shared model headings are not evidence of interchange. Engine fitment is not stated. | Not stated |
|---|
Applications not listed here have not been verified.
Compare the number on your existing part. If you’re unsure, our parts team can help check the match before you order.