The 4L60E pump is the single most important pressure-generating component in the trans. When it wears, line pressure drops, clutches slip, and you cook the whole rebuild. Here is the complete rebuild guide.
Shop the parts for this fix
Doing the whole job? 4L60E Master Rebuild Kit - Frictions & Steels, Gaskets & Seals, Filter, Shift Kit, Servo, Solenoids, Bushings (7-Piece) — $233.99 $245.99 (save 5% vs buying separately)
Or grab the individual parts:
The part for this fix
4L60E Pump Slide Pivot Pin 1993-2008 OEM 8634097
$29.99 · In stock
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What the 4L60E pump does
- Driven by torque converter hub
- Generates all hydraulic pressure for the trans
- Vane-style positive displacement pump
- Output: 60-80 PSI idle, 150-180 PSI WOT
Symptoms of pump wear
Low line pressure:
Pump whine:
Front leak:
Brass particles in pan:
What wears in the pump
Pump rotor:
Pump slide:
Pump bushings:
Pump body:
Pump rebuild parts
Pump rotor kit:
Pump slide:
Pump bushings (set):
Pump body O-ring:
Sealing rings:
Total pump rebuild parts:
HD pump options
Sonnax HD pump body:
Hughes Performance pump:
When to rebuild vs replace pump
Rebuild if:
Replace full pump if:
Install (pump rebuild during trans rebuild)
- Trans must be out
- Pump unbolts from front of trans (13 bolts)
- Separate pump body from stator support
- Pull rotor and slide
- Drive out old bushings
- Press in new bushings (driver tool)
- Assemble pump with new rotor, slide, rings, O-ring
- Reassemble to stator support
- Air-test for proper seal before reinstall
- Reinstall on trans with new gasket
- Torque 13 bolts in cross pattern (18 ft-lb)
Cost
DIY pump rebuild:
DIY full pump + bushings (HD):
Shop pump rebuild (during full rebuild):
Pump rebuild alone (without full rebuild):
Always replace converter with pump
- Worn pump = worn converter hub usually
- Reinstalling old converter wears new pump in 10k miles
- Cost-effective to do both at once
Pair with HD stator support
- Stator support shares wear surfaces with pump
- Read our pump and stator coverage in best 4L60E rebuild kit
What kills a 4L60E pump fast
- Old burnt fluid (varnish sticks parts)
- Tuned engine + stock pump
- Worn converter hub wallowing the bushing
- Skipping filter changes (debris through pump)
Common mistakes
- Skipping pump rebuild during trans rebuild
- Reusing old rotor (failure pattern repeats)
- Not replacing pump body bushings (causes future leak)
- Forgetting the O-ring (instant rear pump leak)
Need 4L60E pump rotor, bushings, HD pump kit? Shop our 4L60E catalog. OEM pump kits, HD pump bodies, complete rebuild kits. Free shipping over $70.
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