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1999 Peterbilt 378
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Lifetime Replacement
1999 Peterbilt 378

1999 Peterbilt 378 Shock Absorber and Strut Assemblies

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Rear, Driver or Passenger Side Shock Sold individually
FCS®
Rear, Driver or Passenger Side Shock Sold individually
Part Number: F347303
Guaranteed to Fit
$32.49
Vehicle Fitment
  • 1999 Peterbilt 378 All Submodels All Engines With Chalmers 46,000 Lb. Rear Suspension; Oem# : 665174, 800670
Product Details
Location : Rear, Driver or Passenger SideType : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE ReplacementProduct Fit : Direct FitWarranty : Lifetime FCS limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Rear, Driver or Passenger Side GR-2/Excel-G Series Shock Sold individually
KYB®
Rear, Driver or Passenger Side GR-2/Excel-G Series Shock Sold individually
Part Number: KY341621
Guaranteed to Fit
$67.99
Vehicle Fitment
  • 1999 Peterbilt 378 Base 6 Cyl 10.5L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 10.3L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 12.0L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 10.8L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 7.2L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 14.0L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 12.7L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 5.9L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 14.6L with Air Leaf Suspension - New Style
  • 1999 Peterbilt 378 Base 6 Cyl 14.9L with Air Leaf Suspension - New Style
Product Details
Location : Rear, Driver or Passenger SideType : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE ReplacementDamping Type : Non-adjustableProduct Fit : Direct FitWarranty : Lifetime KYB limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : GR-2/Excel-G Series
Rear, Driver or Passenger Side GR-2/Excel-G Series Shock Sold individually
KYB®
Rear, Driver or Passenger Side GR-2/Excel-G Series Shock Sold individually
Part Number: KY341620
Guaranteed to Fit
$69.99
Vehicle Fitment
  • 1999 Peterbilt 378 Base 6 Cyl 12.0L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 7.2L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 14.9L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 14.0L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 12.7L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 14.6L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 10.5L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 10.3L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 10.8L with Low Air Leaf Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 5.9L with Low Air Leaf Suspension
Product Details
Location : Rear, Driver or Passenger SideType : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE ReplacementDamping Type : Non-adjustableProduct Fit : Direct FitWarranty : Lifetime KYB limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : GR-2/Excel-G Series
Gas-Magnum 65 Series Shock Sold individually
Monroe®
Gas-Magnum 65 Series Shock Sold individually
Part Number: TS65433
Guaranteed to Fit
$82.99
Vehicle Fitment
  • 1999 Peterbilt 378 Base 6 Cyl 12.0L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 14.0L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 12.7L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 14.6L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 10.3L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 7.2L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 14.9L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 10.5L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 10.8L With 40,000 Lb. Chalmers Suspension
  • 1999 Peterbilt 378 Base 6 Cyl 5.9L With 40,000 Lb. Chalmers Suspension
Product Details
Location : Rear, Driver or Passenger SideType : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE ReplacementDamping Type : Non-adjustableProduct Fit : Direct FitExtended Length : 20.61 in. Extended LengthDamper Travel : 7.02 in. Damper TravelReplaces OE Number : 10148, 665174, 665265, 90044083, 57366636, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 90044642, 59024, 650433MT, 90044681, AMS660130, 315423, E83204, 925337, 728631, 16335, 665109, M85060, 57306895, 4940610, B461725, B23316, 438031, 317964, 557013, 601130, L57649, 680570, 3043, 341628, B462092, 85910, 3178165, 65433, 3166287Interchange Part Number : 10148, 665174, 665265, 90044083, 57366636, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 90044642, 59024, 650433MT, 90044681, AMS660130, 315423, E83204, 925337, 728631, 16335, 665109, M85060, 57306895, 4940610, B461725, B23316, 438031, 317964, 557013, 601130, L57649, 680570, 3043, 341628, B462092, 85910, 3178165, 65433, 3166287Warranty : Lifetime Monroe limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Gas-Magnum 65 SeriesCompressed Length : 13.59 in. Compressed Length
Gas-Magnum 65 Series Shock Set of 2
Monroe®
Gas-Magnum 65 Series Shock Set of 2
Part Number: SET-TS65433-2
Guaranteed to Fit
$182.49
Vehicle Fitment
  • 1999 Peterbilt 378 All Submodels All Engines Shocks are 1.75 in Bore, Chalmers 40,000 lb Rear Suspension, Replaces OE #(s) 665174
Product Details
Location : Rear, Driver or Passenger SideComponents : (2) Shock AbsorberType : ShockCondition : NewQuantity Sold : Set of 2Recommended Use : OE ReplacementDamping Type : Non-adjustableProduct Fit : Direct FitExtended Length : 20.61 in. Extended LengthDamper Travel : 7.02 in. Damper TravelReplaces OE Number : 10148, 665174, 665265, 90044083, 57366636, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 90044642, 59024, 650433MT, 90044681, AMS660130, 315423, E83204, 925337, 728631, 16335, 665109, M85060, 57306895, 4940610, B461725, B23316, 438031, 317964, 557013, 601130, L57649, 680570, 3043, 341628, B462092, 85910, 3178165, 65433, 3166287Interchange Part Number : 10148, 665174, 665265, 90044083, 57366636, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 90044642, 59024, 650433MT, 90044681, AMS660130, 315423, E83204, 925337, 728631, 16335, 665109, M85060, 57306895, 4940610, B461725, B23316, 438031, 317964, 557013, 601130, L57649, 680570, 3043, 341628, B462092, 85910, 3178165, 65433, 3166287Warranty : Lifetime Monroe limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Gas-Magnum 65 SeriesCompressed Length : 13.59 in. Compressed Length
Monroe Rear, Driver or Passenger Side Shock absorber, For Models With 40,000 Lb. Chalmers Suspension - Rear, Driver or Passenger Side
Monroe®
Monroe Rear, Driver or Passenger Side Shock absorber, For Models With 40,000 Lb. Chalmers Suspension - Rear, Driver or Passenger Side
Part Number: TS66636
Guaranteed to Fit
$47.99
Vehicle Fitment
  • 1999 Peterbilt 378 Base 6 Cyl 12.0L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 14.0L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 12.7L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 14.6L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 10.3L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 7.2L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 14.9L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 10.5L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 10.8L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
  • 1999 Peterbilt 378 Base 6 Cyl 5.9L with 40,000 (lb) Chalmers Suspension, Shock Absorbers are 1.38 (in) Bore Diameter
Product Details
Location : Rear, Driver or Passenger SideType : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE ReplacementDamping Type : Non-adjustableDesign : Twin-tubeColor Finish : YellowProduct Fit : Direct FitCollapsed Length : 13.38 in. Collapsed LengthExtended Length : 20 in. Extended LengthReplaces OE Number : 10148, 665174, 665265, 90044083, 57366636, M83127, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 345608, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 90044642, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 59024, 650433MT, 90044681, AMS660130, E83204, 728631, 16335, 665109, 8150371, 57306895, 4940610, B23316, 438031, 317964, 601130, L57649, 680570, 3043, 341628, S2212, 85910, 3178165, 78530771, 83127, 3166287, 5521698Interchange Part Number : JP28030004, 10148, 665174, 665265, 90044083, 57366636, M83127, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 345608, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 90044642, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 59024, 650433MT, 90044681, AMS660130, E83204, 728631, 16335, 665109, 8150371, 57306895, 4940610, B23316, 438031, 317964, 601130, L57649, 680570, 3043, 341628, S2212, 85910, 3178165, 78530771, 83127, 3166287Lower Mount Style : Loop Lower Mount StyleUpper Mount Style : Loop Upper Mount StyleWarranty : Lifetime Monroe limited warrantyGas Charged : Gas ChargedProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Magnum Series
Magnum Series Shock Set of 2
Monroe®
Magnum Series Shock Set of 2
Part Number: SET-TS66636-2
Guaranteed to Fit
$90.99
Vehicle Fitment
  • 1999 Peterbilt 378 All Submodels All Engines Shocks are 1.38 in Bore, Chalmers 40,000 lb Rear Suspension, Replaces OE #(s) 665174
Product Details
Location : Rear, Driver or Passenger SideComponents : (2) Shock AbsorberType : ShockCondition : NewQuantity Sold : Set of 2Recommended Use : OE ReplacementDamping Type : Non-adjustableDesign : Twin-tubeColor Finish : YellowProduct Fit : Direct FitCollapsed Length : 13.38 in. Collapsed LengthExtended Length : 20 in. Extended LengthReplaces OE Number : 10148, 665174, 665265, 90044083, 57366636, M83127, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 345608, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 90044642, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 59024, 650433MT, 90044681, AMS660130, E83204, 728631, 16335, 665109, 8150371, 57306895, 4940610, B23316, 438031, 317964, 601130, L57649, 680570, 3043, 341628, S2212, 85910, 3178165, 78530771, 83127, 3166287, 5521698Interchange Part Number : JP28030004, 10148, 665174, 665265, 90044083, 57366636, M83127, AMS650433, RCSA3127, 6026, L57661, 90044915, 90045083, NW90044979, 57365433, 85326, 345608, 1083204, 600130MT, 665267, AMS600130, 2096001, 537524C91, 6877, 90044642, 3197642, L59030, SA3127, 727604, 661130, E85029, 434236, 83204, 59024, 650433MT, 90044681, AMS660130, E83204, 728631, 16335, 665109, 8150371, 57306895, 4940610, B23316, 438031, 317964, 601130, L57649, 680570, 3043, 341628, S2212, 85910, 3178165, 78530771, 83127, 3166287Lower Mount Style : Loop Lower Mount StyleUpper Mount Style : Loop Upper Mount StyleWarranty : Lifetime Monroe limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Magnum Series
FSD Series Shock Sold individually
Koni®
FSD Series Shock Sold individually
Part Number: K3488051019
Universal Fit
$227.12
Product Details
Type : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE UpgradeDamping Type : Non-adjustableProduct Fit : UniversalWarranty : Koni lifetime warrantyDeals : ClearanceProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : FSD Series
Universal, RS999012, 9-way Adjustable, Compressed Length 19.4in. Extended Length 32.3in, 12.8in. Travel, 16in. Body Length, Sold Individually
Rancho®
Universal, RS999012, 9-way Adjustable, Compressed Length 19.4in. Extended Length 32.3in, 12.8in. Travel, 16in. Body Length, Sold Individually
Part Number: R38RS999012
Universal Fit
$132.49
Product Details
Notes : Lower Loop Bushing Mount - 5/8" Bushing ID X 1.5/16" Bushing OAL; Upper Loop Bushing Mount - 5/8" Bushing ID X 1.5/16" Bushing OALType : ShockCondition : NewQuantity Sold : Sold individuallyRecommended Use : OE UpgradeDamping Type : AdjustableProduct Fit : UniversalExtended Length : 32.3 in. Extended LengthDamper Travel : 12.88 in. Damper TravelBody Length : 16.23 in. Body LengthWarranty : Lifetime Rancho limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : RS9000XL SeriesCompressed Length : 19.41 in. Compressed Length
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Product Questions & Answers

Rancho Universal, RS999012, 9-way Adjustable, Compressed Length 19.4in. Extended Length 32.3in, 12.8in. Travel, 16in. Body Length, Sold Individually
$132.49
Q:What size mounting bolts and length from mounting eye to mounting eye when compressed properly? Show Less
Craig T.
A:BEST ANSWERHello! Collapsed length is 19.375 in. and mounting bolt size is 5/8 in. Show less
Mitchell D.
 
4 Questions, 1 AnswerView all Q&As >
Koni FSD Series Shock Sold individually
$227.12
Q:Do you have a complete set of front & rear shocks?
SalmonSlayer
A:BEST ANSWERHi Al, I'm glad to assist you. For us to check carefully and be accurate on the part you need, please provide the complete details of your vehicle (year, make, model, submodel, 2WD/4WD, and engine size). It is best to call our parts specialist (for real-time live & immediate assistance) on our toll-free number, 1-866-529-0412 (Mon to Sun). Show less
Jeonino E.
 
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