Plain English
What P0700 means for your Chrysler 300
The 300 uses the same ZF 8HP70 as the Charger and Grand Cherokee - generally bulletproof but the mechatronic solenoids wear at 120k+. The ZF 8HP70 8-speed (2012+) is one of the most reliable modern automatics - but the mechatronic unit (integrated valve body and TCM) develops solenoid bore wear at 120k-180k miles. P0700 typically pairs with P0729-P0734 (gear ratio errors), P0841 (PCS-A performance), or P073C/P073D (specific solenoid).
🎯 Top Causes on the Chrysler 300
55%
#1 CAUSE
ZF 8HP70 Mechatronic Solenoid Wear
The ZF 8HP70 8-speed (2012+) is one of the most reliable modern automatics - but the mechatronic unit (integrated valve body and TCM) develops solenoid bore wear at 120k-180k miles. P0700 typically pairs with P0729-P0734 (gear ratio errors), P0841 (PCS-A performance), or P073C/P073D (specific solenoid). A reman mechatronic with a sleeve kit and new solenoids is the standard fix.
Reman Mechatronic
$900-$1,500
Labor
$700-$1,000
Total
$1,600-$2,500
25%
#2 CAUSE
W5A580 (Pre-2012) Conductor Plate
Pre-2012 300s with the Mercedes-derived W5A580 5-speed have well-known conductor plate failures inside the valve body. P0700 with P0716/P0717 (input speed sensor) is the textbook symptom. The conductor plate is a $300-$500 part and a relatively straightforward repair without removing the transmission.
Conductor Plate
$300-$500
Labor
$400-$700
Total
$700-$1,200
15%
#3 CAUSE
TCM Reflash / Software
Stellantis/FCA has released multiple TCM software updates for the 8HP70 addressing shift quality and false codes. A free dealer flash can resolve P0700 in some cases. Always check VIN for open programming campaigns before paying for hardware repairs.
Dealer Flash
$0-$200
Diagnostic
$100-$150
Total
$100-$350
🚗 Most Affected Chrysler 300 Model Years
| Year | Engine/Trans | Primary Cause | Typical Mileage | Notes |
|---|---|---|---|---|
| 2011 | 3.6 / 5.7 W5A580 | Conductor plate | 100k-160k | Last year of W5A580 |
| 2012-2018 | 3.6 / 5.7 8HP70 | Mechatronic solenoid | 120k-180k | ZF 8-speed - very robust |
| 2019-2023 | 3.6 / 5.7 8HP70 | TCM software | 30k-80k | Programming updates available |
⚠️ Is It Safe to Drive Your Chrysler 300 with P0700?
The 8HP70 is robust enough that you can drive carefully for 2-3 weeks while awaiting repair, as long as there are no symptoms beyond the code. If you have harsh shifts, limp mode, or torque converter shudder - schedule sooner.
🔧 How to Diagnose P0700 on a Chrysler 300
- Check VIN for Stellantis programming campaigns. Free dealer flashes have resolved many 8HP70 P0700 cases.
- Use a Chrysler-capable scanner (wiTECH, AlfaOBD, Autel). Generic OBD2 misses many TCM codes on the 8HP70.
- Verify fluid level via scan tool procedure. No dipstick - level is checked at temperature. Use only ZF Lifeguard 8 or MS-12339.
- Pre-2012 W5A580: drop the pan and inspect the conductor plate. A common, relatively cheap repair on those models.
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