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Not sure which
transmission?
MONSTER TRANSMISSION FINDER
Step 1 of 7
What make is your vehicle?
We’ll start by narrowing you into the correct GM, Ford, or Dodge/Ram transmission family.
What best describes your vehicle?
This keeps us from, for example, putting a 68RFE on a Ram 1500 that actually runs an 8-speed.
What year is your vehicle?
We’ll map your year into the correct transmission era.
What engine are you running?
Options shown are filtered by your make + vehicle type + year.
Don’t see your exact engine? Pick “I’m not sure / engine swap.”
What drivetrain?
We’ll prioritize 2WD vs 4x4 coverage.
How do you use the vehicle?
Use case + HP tier determine your recommended build.
About how much horsepower?
Rough guess is fine — higher HP can override use-case.
Your Monster match
Based on your answers, here’s the build level and family you should be shopping.
Chevy / GM

Quality by Design. Monster by Nature.

RoadReady Chevy Transmission

RoadReady

Turn-key everyday reliability for commuters.

  • HP RatingOE / Stock
  • Warranty3 Years • Unlimited Miles
StreetMonster Chevy Transmission

StreetMonster

Mild upgrades for Stock+ applications; pure peace of mind.

  • HP Rating100 HP Over Stock
  • Warranty3 Years • Unlimited Miles
SportMonster Chevy Transmission

SportMonster

For those that demand more—Monster’s best seller.

  • HP RatingUp to 750 HP
  • Warranty6 Years • Unlimited Miles
TrackMonster Chevy Transmission

TrackMonster

Race-ready hardware for ultimate track dominance.

  • HP Rating700+ HP
  • Warranty1 Years • Unlimited Miles

Why Chevy / GM Owners Choose Monster

  • Build tiers mapped to GM families—700R4/200-4R, TH350/TH400, 4L60E/65E/70E/75E, 4L80E/85E, 6L80E/6L90E, Allison 1000—so you buy exactly what your vehicle needs.
  • Known GM weak points addressed—e.g., 4L60E 3–4 clutch & sunshell, 6L80E 3-5-R / 4-5-6 clutch capacity & TCC apply—using the right upgraded parts.
  • Every transmission is end-of-line dyno tested for pressure, timing, and temperature control before shipping.
  • Real support and real coverage—up to 6 years / unlimited miles—plus clear install docs and an easy core return.

Which tier fits my Chevy/GM build?

Stock/commuter → RoadReady. Daily/towing with a mild tune → StreetMonster. Street/track or added load from tires/gearing → SportMonster. Competition or 700+ HP → TrackMonster.

Is a torque converter included?

Yes. A matched converter is included because stall, lockup, and efficiency directly affect drivability and longevity on GM platforms.

Programming & electronics—anything special for GM?

Plan for a full reprogram/relearn after install. 6L80E/6L90E typically need TEHCM/strategy updates and an adaptive drive cycle. Confirm connectors/sensors by year and application.

What should I do during install?

Flush/replace the cooler & lines, use the correct fluid (e.g., DEXRON-VI where specified), verify output/driveshaft compatibility, and complete the adaptive learn. Skipping these steps risks contamination and may void coverage.

How does the warranty work?

Warranty varies by tier with options up to 6 years / unlimited miles. See the product page for exact terms and coverage requirements.

*HP ratings are guidance only; vehicle weight, tires, gearing, and tuning affect capacity. When in doubt, step up a tier.

Monster Knowledge Hub

Chevy / GM Transmission Guide: pick the right unit the first time

If you’re not 100% sure which GM transmission you have (or which tier you need), this section makes it simple: identify → choose a tier → install it right.

1) Identify what you have

Most GM confusion is totally normal—especially around 4L60E vs 4L65E vs 4L70E, and 6L80E vs 6L90E.

  • RPO codes are often the fastest clue (service sticker / build sheet location varies by year).
  • Connector & pan style help separate “close cousins” in the same family.
  • If your truck changed engines/gearing/tires—your tier choice usually needs to change too.

2) Choose the right tier

Tier selection is mostly about vehicle weight, tune, tire size, and use-case.

  • RoadReady: stock feel + daily reliability
  • StreetMonster: mild performance / towing confidence
  • SportMonster: best seller for real power + real driving
  • TrackMonster: when you refuse to compromise

3) Install it the Monster way

Most early failures aren’t “bad transmissions”—they’re contamination, cooling, or programming issues.

  • Cooler & lines: flush properly or replace
  • Correct fluid: match OEM spec for your platform
  • Relearn: adaptives + strategy/TEHCM (common on 6L units)
Quick “don’t skip this” checklist (GM)

Before first drive: confirm converter fully seated, verify cooler flow, check driveline/output match, and complete your programming/relearn. These steps protect the build and protect your warranty coverage.

Is 4L60E the same as 4L65E?

No—same family, different capacity. If you’re tuned, towing, or on bigger tires, you typically want the stronger option (or a higher tier) instead of trying to “make stock work.”

Do 6L80E / 6L90E need programming?

Yes—plan for a full relearn and confirm strategy/TEHCM requirements for your year. Skipping this can cause harsh shifts, converter issues, and heat.

Should I replace the cooler?

If the previous unit failed, contamination is the #1 repeat-killer. At minimum, do a proper flush and verify flow. When in doubt—replace the cooler.

What if I’m between tiers?

Go up a tier. Weight, gearing, tires, and tuning stack load quickly on GM platforms—especially on 4L60E-family and 6L units.

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