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John, Master A.S.E Automotive technician
Category: Chevy
Satisfied Customers: 9176
Experience:  A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
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2003 chevy: transmission problems..this morning it has no reverse

Resolved Question:

my 2003 chevy silverado is having transmission problems last nite it was fine this morning it has no reverse and seems to not want to change out.The fluid is ok
Submitted: 6 years ago.
Category: Chevy
Expert:  John replied 6 years ago.

HelloCustomer

There are several things that can cause you situation.One of the first things you should do (besides checking the fluid w/engine running -warmed up,which you indicate you have already done) is to scan the powertrain control module with a class 2 scan tool.

I have seen more of the reaction sun shell come apart than anything.

 

Input Housing Assembly (602)

3-4 Apply ring stuck in applied position
Forward clutch not releasing
Turbine shaft seals missing, cut or damaged

Manual Valve Link (89)

Disconnected

Valve Body Assembly (60)

2-3 Shift valve stuck
Manual linkage not adjusted
Spacer plate and gaskets incorrect, mispositioned or damaged
Lo overrun valve stuck
Orificed cup plug restricted, missing or damaged

Reverse Input Clutch Assembly (605-614)

Clutch plate worn
Reverse input housing and drum assembly cracked at weld
Clutch plate retaining ring out of groove
Return spring assembly retaining ring out of groove
Seals cut or damaged
Restricted apply passage
Porosity in piston
Belleville plate installed incorrectly
Excessive clutch plate travel
Oversized housing

Lo and Reverse Clutch (694-696)

Clutch plates worn
Porosity in piston
Seals damaged
Return spring assembly retaining ring mispositioned
Restricted apply passage

Reaction Sun Shell (670)

Broken spline on reaction sun shell/replace shell

John, Master A.S.E Automotive technician
Category: Chevy
Satisfied Customers: 9176
Experience: A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
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A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician