Expert Support
🔧 Can't make it to our shop? No problem. Our parts are engineered to be installed by any trusted local mechanic — no specialty tools or factory training required. We stay booked 12+ months out on in-house builds, but you don't have to wait. Full builder support included — we're here to help you and your mechanic get it done right.
Description
Stop hunting for a rare 4x4 transmission. The Wicked Wrench Motorsports 8L90 4WD Conversion Kit transforms a plentiful 2WD 8L90 into a high-performance 4x4 8L90E layout — perfect for Gen V LT restomods, classic Chevy K10 builds, and custom off-road rigs.
By converting the output shaft away from a 2WD slip yoke configuration, you can easily adapt your drivetrain to standard 4x4 transfer cases. Retain the massive 7.0 overall gear ratio and lightning-fast shift speeds of GM's modern 8-speed automatic platform without the multi-thousand dollar crate transmission price tag.
⭐⭐⭐⭐⭐ What Builders Are Saying
"They promptly shipped my parts. Incredibly knowledgeable and willing to assist. Great people."
— David S. ✅ Verified Customer
"Knowledge on all gen 5 and square body conversion. Helped me with the set up I need for my 81 Jimmy."
— Midtown Roofing ⭐⭐⭐⭐⭐ Verified Customer
What's Included:
- Complete brand-new 4WD rear housing with pre-pressed bearings and heavy-duty oil seals
- Premium 4WD output shaft engineered for a leak-free, factory-quality fitment