SKU: 37645751545

2004-2008 Ford & Lincoln F150, Mark LT 2 & 4 Wheel Drive Rear Leaf Spring - 3 Leaves - 43-1679

Sale price$134.99 Regular price$149.99
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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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Description

2004-2008 Ford & Lincoln F150, Mark LT 2 & 4 Wheel Drive Rear Leaf Spring - 3 Leaves - 43-1679*Diagram Spring May Differ From Actual Spring* Number of Leaves 3 (2 1) Leaf Spring Width 3" A Leaf Spring Length: 25 5 8" B Leaf Spring Length: 31 3 8" C Leaf Spring Arch: 7 1 4" D Spring Pack Thickness: 1 5 8" Leaf Spring Capacity: 1,500 lbs. Leaf Spring OEM Numbers: 6L3Z5560RD and 6L345560RF Leaf Spring Eye Bushings: Front RB 275 Rear RB 276 Includes Front and Rear Eye Bushings Leaf Spring Material: 2 380 2ND 1 662 Location Rear 2 Center Bolts New

  • *Diagram Spring May Differ From Actual Spring*
  • Number of Leaves - 3 (2/1)
  • Leaf Spring Width - 3" 
  • A - Leaf Spring Length: 25-5/8"
  • B - Leaf Spring Length: 31-3/8"
  • C - Leaf Spring Arch: 7-1/4"
  • D - Spring Pack Thickness: 1-5/8"
  • Leaf Spring Capacity: 1,500 lbs.
  • Leaf Spring OEM Numbers: 6L3Z5560RD and 6L345560RF
  • Leaf Spring Eye Bushings: Front RB-275 / Rear RB-276
  • Includes Front and Rear Eye Bushings
  • Leaf Spring Material: 2/380 2ND 1/662
  • Location - Rear
  • 2 Center Bolts
  • New Body Style

 

Verify the OEM part number and measurements to confirm compatibility before purchasing. Need help? Visit: How to Identify a Leaf Spring.

 

Leaf spring 43-1679 is the rear leaf spring on 2004-2008 Ford F150 2 wheel and 4 wheel drive trucks. Also fits Lincoln Mark LT. The rear spring is 3" wide, is a 3 (2/1) leaf spring and the capacity is 1,500 lbs. The OEM numbers are 6L3Z5560RD and 6L345560RF.


Models And Year Ranges:

Fits: 2004-2008 Rear Ford F150 (2WD And 4WD)

Fits: 2006-2008 Rear Lincoln Mark LT (2WD And 4WD)

Shipping Notes
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Exchange/Return Notes
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SKU: 37645751545

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4.3 ★★★★★
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R
Verified Purchase
Raptor
Pawtucket, US
★★★★★ 5
Near OEM quality at 1/4 cost
Near OEM performance at 25% of the cost! Bosch Quality replaced NGKs/Toyota OEMs. Great value and now the engine is running smoothly! I have seen a slight improvement in my mpg @1mpg overall in mixed driving conditions.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
J
Verified Purchase
Joe H.
Boise, US
★★★★★ 5
Very Expensive
Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
R
Verified Purchase
rkab8745
Waukegan, US
★★★★★ 5
A reliable set of spark plugs.
They’re made in Germany, what else can you say
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Reviewed in the United States on April 24, 2026
A
Verified Purchase
Amazon Customer
Louisville, US
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
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Reviewed in the United States on April 29, 2026
C
Verified Purchase
Christopher D. Bodirsky
Louisville, US
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026

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