5R110W vs 6R140: Ford Diesel Trans

Ford has used the 5R110W TorqShift (2003-2010) and 6R140 (2011-2019) behind Powerstroke diesels. Here's the comparison for owners and rebuilders.

Quick spec comparison

5R110W TorqShift:

  • 5-speed automatic
  • ~650 ft-lb stock (early), ~800+ (late 6.4L)
  • 2003-2010 F-Series Powerstroke 6.0L and 6.4L
  • 6.7L 2011 transition year

6R140:

  • 6-speed automatic (similar 10R80 architecture)
  • ~900-1,000 ft-lb stock
  • 2011-2019 F-Series Powerstroke 6.7L
  • Heavy-duty pickup workhorse

Gear ratios

5R110W:

  • 1st: 3.09 (or 3.97 in "Tow" mode)
  • 2nd: 2.20
  • 3rd: 1.54
  • 4th: 1.00
  • 5th: 0.71
  • Reverse: 2.88

6R140:

  • 1st: 3.97
  • 2nd: 2.32
  • 3rd: 1.51
  • 4th: 1.15
  • 5th: 0.86
  • 6th: 0.67
  • Reverse: 3.13

Result:

  • 6R140 lower 1st gear
  • More gears = more refinement
  • Better MPG at cruise

Strength comparison

5R110W stock:

  • 6.0L Powerstroke: ~600 ft-lb
  • 6.4L Powerstroke: ~750-800 ft-lb (HD upgrades)

6R140 stock:

  • ~900-1,000 ft-lb
  • Designed for 6.7L Powerstroke 800+ ft-lb torque
  • Industry-leading capacity

With HD upgrades:

  • 5R110W: 850+ ft-lb with full HD
  • 6R140: 1,100+ ft-lb with full HD

Applications

5R110W:

  • 2003-2007 F-250/350 6.0L Powerstroke
  • 2008-2010 F-250/350 6.4L Powerstroke
  • F-450/550 chassis cab

6R140:

  • 2011-2019 F-250/350 6.7L Powerstroke
  • F-450/550 chassis cab through 2019
  • 6.2L gas applications too

Common failures

5R110W:

6R140:

Both:

Rebuild costs

5R110W:

  • DIY: $1,500-2,500
  • Shop: $3,500-5,500
  • HD reman: $4,000-6,500

6R140:

  • DIY: $2,000-3,000
  • Shop: $4,500-7,000
  • HD reman: $5,500-8,500

Cost difference:

  • 6R140 more complex
  • More parts to replace
  • Specialty tools sometimes needed

HD upgrades

5R110W HD:

  • BTS HD rebuild kit
  • Sonnax HD parts
  • HD torque converter
  • Read our Sonnax explained

6R140 HD:

  • BTS/ATS/SunCoast HD kits
  • Billet input shaft
  • HD apply pistons
  • HD TCC

Result with HD:

  • 5R110W: 850+ ft-lb capable
  • 6R140: 1,100+ ft-lb capable
  • Both bulletproof for max-tow use

Service intervals

5R110W:

6R140:

  • Pan drop + filter: 30,000 miles tow / 60,000 normal
  • Full flush: 60,000 tow / 100,000 normal
  • Mercon LV fluid specific
  • Read our Mercon vs Dexron

Fluid specifications

5R110W:

  • Mercon SP (specific)
  • Don't substitute with standard Mercon
  • ~12-14 quarts capacity

6R140:

  • Mercon LV
  • ~14-17 quarts capacity
  • HD service fills more

Read our transmission fluid types

Which to swap into your project

Generally no — these stay in their factory trucks

  • Bellhousing pattern is Ford diesel-specific
  • Wiring/ECM integration complex
  • Better: rebuild what's in the truck

Exception:

  • 5R110W into older Ford diesel with adapter
  • Significant project, specialty shop needed

When to rebuild vs replace

Rebuild makes sense if:

  • Local quality shop available
  • Cost-sensitive
  • Good cores available

Replace (reman) makes sense if:

  • No quality rebuilder nearby
  • Want warranty
  • Need fast turnaround

Read our transmission parts buying guide

Operating practices for both

Mandatory:

Recommended:

Year-by-year quirks

5R110W:

  • 2003-2007 (6.0L era): more failures historically
  • 2008-2010 (6.4L era): updated, more reliable
  • HD aftermarket mature

6R140:

  • 2011-2014: early version, some issues
  • 2015+: refined, very reliable
  • HD aftermarket still developing

After rebuild

Break-in:

Adapt learn:

  • Drive normally 100+ miles
  • TCM learns new clearances
  • Behavior improves over time

Need 5R110W or 6R140 parts? Shop our complete catalog. Rebuild kits, Sonnax HD upgrades, complete diesel trans solutions. Free shipping over $70.

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