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RussMasterTech
RussMasterTech, ASE Certified Technician
Category: Chevy
Satisfied Customers: 791
Experience:  19 years of GM Dealership experience. ASE Master with L1 and GM Master Certified in Electrical
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I rebuilt my 2003 4l60e..rebuild..40 miles..correct level

Resolved Question:

I rebuilt my 2003 4L60E TRANSMISSION. I had 4th gear after the rebuild, but now after 40 miles I have no 4th gear. Fuild is clean and to the correct level. What could it be?
Submitted: 6 years ago.
Category: Chevy
Expert:  RussMasterTech replied 6 years ago.

Hello Matt,

You most likely have a chip of metal or some other debris in the valve body. I'll give you the factory check list for a no 3-4 upshift so you know what could cause this.


No 3-4 Shift, Slips or Rough 3-4 Shift

No 3-4 Shift/Slipping or Rough 3-4 Shift

Checks

Causes

Oil Pump Assembly (4)

Pump cover retainer and ball assembly omitted or damaged
Faces not flat

Valve Body Assembly (60)

Valves stuck
- 2-3 Shift valve train
- Accumulator valve
- 1-2 Shift valve train
- 3-2 Shift solenoid valve assembly
Spacer plate or gaskets incorrect, mispositioned or damaged

2-4 Servo Assembly (13-28)

Incorrect band apply pin
Missing or damaged servo seals
Porosity in piston, cover or case
Damaged piston seal grooves
Plugged or missing orifice cup plug

Case (103)

3rd Accumulator retainer and ball assembly leaking
Porosity in 3-4 accumulator piston or bore
3-4 Accumulator piston seal or seal grooves damaged
Plugged or missing orifice cup plug
Restricted oil passage

Input Housing Assembly (621)

Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting

2-4 Band Assembly (602)

Worn or misassembled

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Russ
RussMasterTech, ASE Certified Technician
Category: Chevy
Satisfied Customers: 791
Experience: 19 years of GM Dealership experience. ASE Master with L1 and GM Master Certified in Electrical
RussMasterTech and 3 other Chevy Specialists are ready to help you

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RussMasterTech
RussMasterTech
Chevy Mechanic
791 Satisfied Customers
19 years of GM Dealership experience. ASE Master with L1 and GM Master Certified in Electrical