5-6 Shift
The P0829 code means the vehicle's onboard diagnostic system has detected: 5-6 Shift. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $2,500 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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What Are the Symptoms of P0829?
- Check Engine Light illuminated
- Harsh or delayed 5th to 6th gear shift
- Transmission slips during 5-6 upshift
- Vehicle may stay in 5th gear and not upshift to 6th
What Causes P0829? (Most Likely First)
- Worn 5-6 shift clutch pack or band Very High
- Faulty 5-6 shift solenoid High
- Low or degraded transmission fluid Moderate
- TCM calibration issue or internal valve body wear Low
Can I Still Drive with P0829?
Short distances only. P0829 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does a 5-6 shift code mean?
P0829 indicates the TCM detected an issue with the shift from 5th to 6th gear. This could be slippage, harsh engagement, or failure to complete the shift.
Is this a sign of internal transmission damage?
It can be. If the 5-6 clutch pack is worn, internal transmission work or a rebuild may be needed. However, a faulty solenoid or low fluid are less expensive fixes.
Will changing transmission fluid help?
If the fluid is low or severely degraded, a fluid change may improve shifting. However, if the clutch pack is worn, fluid alone will not fix the problem.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0829?
-
Check transmission fluid level and condition
-
Monitor 5-6 shift timing and quality with a scan tool
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Test 5-6 shift solenoid resistance and operation
-
Perform a transmission line pressure test during 5-6 shift
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P0829?
- 2007-2017 Ford F-150 (6R80)
- 2008-2018 GM Silverado (6L80)
- 2010-2020 Ram 1500 (65RFE)
- 2009-2019 Toyota Tundra
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