Experienced New Venture NV4500 Manual specialists since 1987. Free computer diagnostic, lifetime warranty on rebuilds.
The NV4500 is a heavy-duty 5-speed manual used in GM and Dodge HD trucks. Built for severe-duty use, it's in many contractor and farm trucks with hundreds of thousands of miles. Common issues are 5th gear snap ring failure, countershaft bearing wear, and input shaft damage from clutch work.
| Speeds | 5 |
| Type | Manual |
| Fluid | Synthetic gear oil (75W-90 GL-4) |
| Fluid Capacity | 6.5 qts |
The 5th gear snap ring fails under sustained highway use, allowing 5th gear to walk back and disengage.
Symptoms: 5th gear pops out at highway speed
High-mileage NV4500s develop countershaft bearing noise — a drone that increases with vehicle speed.
Symptoms: Gear whine that increases with speed
Input shaft wear from clutch drag or abuse.
Symptoms: Difficult gear engagement, input shaft noise
"Honest diagnosis, fair price, and the repair was done right. Chicago Transmission has been my go-to for years. Wouldn't trust anyone else with my car."
"The free diagnostic alone was worth the trip. They found the problem fast, gave me a written estimate, and completed the work on time. Exceptional service."
"Family owned and it shows. They treated my car like it was their own. The lifetime warranty on my rebuild gives me total peace of mind. Highly recommend."
The snap ring holding 5th gear retainer wears or fails. It's a known design limitation. Updated snap rings are available that fix the problem.
GL-4 only. GL-5 fluid has extreme-pressure additives that attack brass synchros. We've seen many NV4500s destroyed by GL-5 fluid.
3–4 days.
The NV5600 (6-speed) has a higher torque capacity and is preferred for tuned diesel applications.
Yes — Cummins Dodge trucks with manual transmissions are a regular job for us.
Bring it to Chicago's most experienced New Venture NV4500 Manual shop. Free diagnostic, written estimate, no obligation.
