XDP Tow Series Flex Plate XD644

PART# XD644 | SKU XD644
★★★★★ ★★★★★ 4.5 (2 Reviews)

Vehicle Fitment For:
2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML Allison 1000

See full application list below
NOTES: Without Ring Gear Allison LCT-1000/2000/2400 Some trucks may be equipped with one or two shims or spacers on either side of the OEM flex plate. These shims or spacers wi
$199.95

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Description

The XDP Tow Series Flex Plate XD644 is a must-have to replace the factory flex plate if you have made performance upgrades to your diesel. If your truck is used for constant heavy-duty towing, it's only a matter of time before your factory flex plate fails. Modifications and continuous heavy hauling add further strain to the flex plate that can result in heat spots from the torque converter. These heat cycles can cause these heat spots to crack and even cause the center of the flexplate to tear apart.

The Tow Series Flex Plate is engineered to withstand the abuse of heavy towing and not break the bank. Not only is this flex plate ideal for towing, but the additional strength makes it well suited for competition, off-road, and other severe duty conditions. This flexplate is manufactured from cold rolled steel and features a black e-coat finish that helps prevent corrosion. Being SFI 29.1 approved, it will be able to last for many years of competition and heavy-duty use.


Features:
  • SFI 29.1 Certified
  • Manufactured From Cold Rolled Steel
  • Black E-Coat Finish Helps Prevent Rust
  • 4mm Thick Centerplate Provides Rigidity
  • Ideal For Heavy-Duty Towing, Competition, & Severe-Duty Requirements
Manufacturer Warranty*:
2 Year / Unlimited Mileage
Note:
Without Ring Gear
Allison LCT-1000/2000/2400
Some trucks may be equipped with one or two shims or spacers on either side of the OEM flex plate.
These shims or spacers will not be needed for installation of the XDP flex plate as it is thicker than the OEM flex plate.
Removal of any shims or spacers is necessary to ensure good thread engagement of the flex plate bolts to the crankshaft.

Instructions & Tech Info

Installation Info
Customer Average
5 Hours

Reviews For XDP XD644

Overall Rating
4.5/5
2 Reviews
Rating Snapshot
5 ★
1
4 ★
1
3 ★
0
2 ★
0
1 ★
0
Verified Buyer
★★★★★ ★★★★★
Flywheel flex plate
Daniel (Davis ok) | May 7th, 2026
Overall a good product I was not happy that there wasn’t a sticker in the box.
Verified Buyer
★★★★★ ★★★★★
custmer
Dave (home) | February 24th, 2025
The flex plate is well made, seems to do the job in truck. No virbrations, didn't need bolts.
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Frequently Asked Questions

Where do I get the ring gear for it?
The XDP Tow Series Flex Plate XD644 reuses your factory outer ring gear.
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More to Consider

Specifications For XDP XD644

MPN XD644
SKU XD644
ID 146695
Manufacturer Name XDP
Shipping Weight 5.00 lb.
Shipping Length 14 in.
Shipping Width 14 in.
Shipping Height 1 in.
Fuel Type Diesel
E-Code 1
Manufacturer Warranty* 2 Year / Unlimited Mileage
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Internal L2R23

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