Replaces the cracked or grooved front input bearing retainer on 1992-1995 Chevy NV4500 five-speeds so the throwout bearing rides true again.
If your 1992-1995 Chevy or GMC pickup with the NV4500 five-speed has a clutch pedal that feels gritty, a release bearing that hangs up, or a clutch that drags at a stop, look at the snout the throwout bearing slides on. This Motive Gear NV17507R is the front input bearing retainer for those early GM NV4500 trucks, the ones that use an external clutch slave cylinder and a conventional fork-driven throwout bearing. It is built to the New Process Gear 17507 pattern, the same number that interchanges with GM 15637295.
The retainer bolts to the front face of the NV4500 case. It holds the input shaft bearing in its bore, carries the front input seal, and its long tube is the guide sleeve the throwout bearing rides on every time you press the pedal. On the 1992-1995 GM trucks the slave cylinder is mounted outside the bellhousing and pushes a fork, so the release bearing slides back and forth on this tube thousands of times a week in traffic. When the tube wears, the bearing no longer slides square to the pressure plate fingers. GM changed to an internal concentric slave on the 1996-up NV4500, and those trucks use a different retainer, which is why the year split matters here.
Grinding into every gear while moving is more often worn synchronizer rings than a retainer problem, so read the symptoms carefully before you spend money on the wrong side of the box.
With the truck running and the pedal on the floor, the input shaft should stop within a few seconds in neutral. If it keeps spinning and the hydraulics bleed out clean and firm, the release side is not doing its job. Once the transmission is out, pull the throwout bearing off and run a finger along the retainer tube. Any step, scoring or flat spot means replace it now instead of after the new clutch is worn out. Our guide to manual vs automatic transmission repair cost explains why the parts you replace while the box is out are the cheapest ones on the bill.
This retainer fits 1992-1995 Chevrolet and GMC trucks with the NV4500 five-speed and an external clutch slave, built to New Process Gear C17315 specifications. It does not fit 1996-up GM NV4500s with the internal slave, and it does not fit Dodge Ram NV4500s, which use their own gas and diesel retainers sized to a different input shaft. If your truck is close to the changeover year or has had its transmission swapped, check the slave cylinder location on your truck or send us your year and VIN before ordering. It is sold as one retainer. Other GM and Dodge NV4500 hard parts are listed in our hard parts category.
If the box shifts poorly once it is back in, the NV4500 synchronizer ring kit for Chevy and GMC is the next part to plan for, and a tired shifter can be tightened up with the NV4500 shifter tower and bushing kit.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. GM moved the NV4500 to an internal concentric slave cylinder for 1996 and later, and those trucks use a different front retainer. This one is for the 1992-1995 external slave trucks.
No. Dodge NV4500s use separate gas and diesel retainers matched to their input shafts. This part is the GM 17507 design.
It is sold as one retainer. Plan on a new front input seal and gasket, and new retainer bolts, when you install it.
Look for a groove or step where the throwout bearing slides, an ovaled seal bore, or cracks at the bolt ears. A notchy pedal or a throwout bearing that hangs up on the sleeve are the common driving symptoms.
Yes. Running a used release bearing on a new sleeve or a new bearing on a worn sleeve both shorten clutch life. Replace the clutch, throwout bearing and retainer together while the transmission is out.
