P0700 on RAM: How to Diagnose & Fix
Transmission Control System Malfunction
2 RAM models · 2 documented issues · 1 critical · $150-$6,500 repair
P0700 on RAM by model: symptoms, diagnosis and fix
The ZF 8HP 8-speed automatic transmission can experience harsh shifting, hesitation, and jerky behavior. Some units have failed prematurely. Early model years (2013-2016) seem most affected. Multiple TSBs have been issued for software updates.
Common Symptoms
- Harsh or delayed shifts
- Transmission slipping
- Jerky acceleration
- Hesitation when accelerating
- Check engine light with trans codes
How to Fix
First step: Get latest transmission software update from dealer (often free). Change transmission fluid and filter every 60,000 miles using ZF Lifeguard 8 fluid only. If problems persist, valve body replacement may be needed ($1,500-2,500). Full transmission replacement runs $4,000-6,500.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Dorman 265-850 8-speed transmission pan/filter conversion
Confirm transmission code and OE pan cross-reference.
- ZF LifeguardFluid 8 seven-liter service fill
Confirm 845RE/8HP75 fluid specification and total quantity separately rather than inferring.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipDIY repairs can save significantly - dealer charges $1,500-2,500 but DIY costs are typically 50-70% less
- TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
- TipSearch RAM 1500 forums and owner groups for real-world experiences and DIY guides
- TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
Sources for this issue (2)
The RAM ProMaster City uses the ZF 9HP48 9-speed automatic transmission which is plagued with harsh shifting, delayed engagement, gear hunting, and premature failure. The transmission struggles with low-speed maneuvers, often jerking or hesitating during parking lot driving. Some owners report the transmission failing to shift out of first gear or getting stuck in gear. FCA issued TSB 21-053-15, a scan-tool Quick Learn procedure for the 948TE 9-speed used to address poor or erratic shift quality. The 9HP has been the subject of class-action lawsuits across multiple Stellantis vehicles. TCM software updates may help but many vans need valve body replacement ($1,200-2,000) or complete transmission rebuild ($3,000-5,000).
Common Symptoms
- Harsh or jerky shifting at low speeds
- Hesitation when accelerating from stop
- Transmission hunting between gears
- Stuck in one gear (fails to upshift)
- Clunking when shifting into Drive or Reverse
- Delayed engagement (2-3 second delay)
- Check engine light with transmission fault codes
How to Fix
Start with a TCM software update at the dealer (free under warranty), referencing TSB 21-053-15 (948TE Quick Learn procedure). Have the dealer perform a transmission adaptation reset after update. If shifts remain harsh, request valve body inspection/replacement ($1,200-2,000). Ensure correct ZF 9-speed fluid is used (Mopar 68218925AA). Complete fluid change (not just drain and fill) every 40,000 miles. If transmission has failed completely, replacement/rebuild costs $3,000-5,000. Some owners opt for remanufactured transmissions from Jasper or AAMCO.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (4)
P0700 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0700 mean on a RAM?
P0700 stands for "Transmission Control System Malfunction." P0700 is a general code indicating the transmission control module (TCM) has detected a fault somewhere in the transmission control system and has requested the check engine light be turned on. By itself it doesn't pinpoint the problem — it's an 'umbrella' code that tells you to look for additional, more specific transmission codes stored alongside it. The actual fault could be electrical, a sensor, a solenoid, or an internal transmission issue. You may notice harsh or delayed shifts, slipping, or the transmission going into a protective 'limp' mode. On RAM it is documented across 2 models: 1500, ProMaster City.
What are the most common causes of P0700?
The most common causes of P0700 are: Stored companion transmission codes pointing to the real fault, Faulty shift solenoid or pressure control solenoid, Low, dirty, or degraded transmission fluid, Faulty transmission speed or input/output sensor, Wiring, connector, or ground problems at the transmission, Failing transmission control module (TCM), Internal transmission mechanical wear or clutch problems, Valve body fault or sticking valves. The specific cause varies by vehicle.
How much does it cost to fix P0700 on a RAM?
Published repair estimates on RAM range from $150 to $6,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.