What P0700 means for your RAM 1500
The RAM 1500 uses the ZF 8HP70 or 8HP75 (TorqueFlite 8). It is generally robust but fluid degradation and Hemi MDS lifter issues can trigger P0700. P0700 is the "umbrella" code that tells you the TCM has stored at least one other transmission-related fault. Always pull the full code list, not just P0700, when diagnosing.
Top Causes on the RAM 1500
Cause percentages are AmpAuto estimates based on TSB review, owner forum patterns, and shop data. Your vehicle may differ. Always confirm with a full scan before purchasing parts.
Most Affected 1500 Model Years
| Year | Engine/Trans | Primary Cause | Typical Mileage | Notes |
|---|---|---|---|---|
| 2013-2018 | 5.7L Hemi / 8HP70 | MDS lifter, fluid | 80k-150k | MDS lifter is leading cause |
| 2019-2024 | 5.7L / 3.0L EcoDiesel / 8HP75 | Fluid, mechatronic | 60k-120k | Heavy-tow trucks fail earliest |
| 2014-2024 | 3.6L V6 / 8HP70 | Fluid degradation | 90k-150k | Less stressed, lasts longer |
Is It Safe to Drive Your RAM 1500 with P0700?
How to Diagnose P0700 on a RAM 1500
- Pull the full sub-code list, not just P0700. P0700 alone tells you nothing - the TCM stores it whenever any other trans code is active. Look for codes in the P0730-P0799 range and the P0840-P0899 range.
- Check TSBs and recalls against your VIN. The ZF 8HP70 / 8HP75 has documented service bulletins. A free dealer reflash resolves many P0700 cases without parts.
- Verify fluid level and condition. Wrong fluid or low fluid is the #1 cause of P0700 across nearly every modern automatic. Confirm fluid spec from the door jamb or owner's manual before any service.
- Inspect the pan magnet for ferrous debris. Heavy metallic shavings mean internal wear; a fluid service alone will not save the transmission. Plan for a reman if you see significant debris.
Common Questions About P0700 on the RAM 1500
Is the ZF 8HP in my RAM 1500 really "lifetime fluid"?+
No. Stellantis labels it lifetime but ZF (the manufacturer) recommends fluid changes every 60k-80k miles. If you tow or drive in hot climates, change at 60k. Wait until 100k and you risk P0700 plus accelerated wear.
How do I know if P0700 on my Hemi RAM is the MDS lifter issue?+
Check for misfire codes (P0300-P0308) stored alongside P0700. If you have both, plus a ticking sound from the engine, it is the MDS lifter, not the transmission. The fix is at the engine, not the trans.
Can I delete the MDS to prevent the lifter issue?+
Yes, MDS deletes via custom tune (Diablo, HP Tuners) are common in the RAM community. It voids that portion of the powertrain warranty but eliminates the failure mode entirely. Cost: $400-$700 for the tune.
What fluid should I use for an 8HP70 fluid exchange on my RAM?+
Use ZF Lifeguard 8 or Mopar ATF+4 explicitly labeled ZF-spec (part 68218925AB or AC). Do NOT use generic ATF+4 or "universal" fluids - wrong fluid causes immediate shudder and P0700.
Find a Shop Near You
Find transmission specialists near you who know the ZF 8HP70 / 8HP75.