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Transmission Mount Isolator for John Deere 640L, 648L, 748L, 848L, 948L – AT421759

SKU:
AT421759
FitsModel:
640L, 648L, 748L, 848L, 948L, 640L-II, 648L-II, 748L-II, 848L-II, 948L-II, 640L-III, 648L-III, 748L-III, 848L-III, 948L-III, 768L-II, 768L-III
ListDescription:
Transmission Mount Isolator
Transmission mount isolator AT421759 for John Deere 648L grapple skidder
Part # AT421759

Fits Models At A Glance:

  • John Deere Forestry – L Series Skidders: 640L, 648L, 748L, 848L, 948L
  • John Deere Forestry – L-II Series Skidders: 640L-II, 648L-II, 748L-II, 848L-II, 948L-II
  • John Deere Forestry – L-III Series Skidders: 640L-III, 648L-III, 748L-III, 848L-III, 948L-III
  • John Deere Forestry – Bogie Skidders: 768L-II, 768L-III

Key Notes:

  • Part Numbers: AT421759
  • Type: Transmission mount isolator
  • Dimensions: 25.4 mm (1 in) thick, 24.08 mm (0.95 in) inside diameter
  • Weight: 1.30 lbs (0.59 kg)
  • Related Parts: AT227815 is a same-size isolator on other John Deere machines — compare part numbers before substituting. For the D through H series skidders, the transmission and motor mount isolator is AT102326.
  • Application: Supports the transmission on the frame of John Deere L Series skidders, absorbing drivetrain vibration and shock before it reaches the frame and cab.
  • Condition: Replacement Part for John Deere Equipment

Common Use Case or Symptoms: Use when there is excessive drivetrain vibration, clunking on direction changes or under load, or the rubber is cracked, collapsed or separated from the insert — worn transmission mounts let the transmission shift and stress driveshafts, U-joints and hoses.

Why Choose Broken Tractor:

  • ✅ Correct Transmission Mount for the L Series Skidders – L, L-II, L-III and 768L bogie
  • ✅ Dimensions Listed So You Can Match Your Old Mount – 25.4 mm thick, 24.08 mm ID
  • ✅ Fast Shipping from a U.S.-Based Team – ready to ship from our U.S. warehouses
$76.00

Shipping calculated at checkout. If any item in your order is temporarily unavailable, we'll contact you to arrange a back-order or refund — whichever you prefer.

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Product: Category: Brand: Head Title: Transmission Mount Isolator | Broken Tractor | AT421759