QU50204 NV4500 4x2 Rear Output Seal for GM C3500HD with Park Brake

QU50204 GM C3500HD with Park Brake NV4500 4x2 Rear Output Seal for GM C3500HD and C4500 trucks with 15,000 pound and higher GVW. This Seal ONLY fits C3500HD and C4500 models having New Venture NV4500 5 speed manual transmissions with transmission mounted parking brakes!

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Dan the Gear Man® Tech Notes:
Lubricate
Only Fits
Matching Parts
Lubricants, Sealants, Threadlockers
NV4500 Tools
Applications

Tech Note 1: Lubricate
Lubricate the seal lip with clean grease to provide initial lubrication.

Tech Note 2: Only Fits
QU50204 only fits 4x2 conventional cab GM trucks with a long, cast iron rear housing and a transmission mounted parking brake. This would include the 15,000 pound GVW C3500HD and some C4500 trucks.

Tech Note 3: Matching Parts
Matching Parts for QU50204 GM NV4500 4x2 Rear Seal:
QU10217 GM NV4500 Extension Housing with Park Brake Mounting Location
QU10106 12 Point Metric Tailshaft Housing Bolt with factory applied Threadlocker
QU10146 Tailshaft Housing Alignment Dowel
NV4500GME Transmission Main Case for 1992-1995 GM
NV4500E Transmission Main Case for 1996 GM
NV4500L Transmission Main Case for 1997-2007 GM
QU40902 1410 Series Rear Output Yoke with Pad for E-Brake Drum
QU10227 Bolt-In Speedometer Sensor
QU90003 Anaerobic Sealant
QU90006 3.35 oz Ultra Black RTV Sealant
QU90005 0.5 oz Ultra Black RTV Sealant
S24200 6ml Threadlocker
S9978 1 gram Threadlocker
QU90020 NV4500 Manual Transmission Oil
TM1003 NV4500 Shop Manual
VSG1003DVD NV4500 Overhaul Video

Tech Note 4: Lubricants, Sealants, Threadlockers
Early production NV4500 Transmissions used an anaerobic sealant (QU90003) to seal between the main case and input bearing retainer, top cover, and rear housing. Mid-production units used anaerobic sealant just on the input retainer and RTV for everything else. Later production transmissions used black RTV Sealant (QU90006 or QU90005) for everything. Either type of sealant works fine (except the PTO covers ALWAYS should be sealed with RTV), but I prefer RTV for all components. Regardless of which sealant you use, make sure excess sealant does not block the lube access hole at the top of input retainer pilot that fits into the transmission case. Also, the threaded holes in the main case for the four retainer bolts and 12 PTO bolts are open ended, so you must use new bolts with factory applied threadlocker or apply Threadlocker (S24200) to your existing bolts to prevent oil seepage past the bolt threads. See my TM1003 NV4500 Shop Manual or VSG1003DVD NV4500 Overhaul Video for more information.

Lubricant and Chemical List for NV4500 Transmissions
QU90020 NV4500 Manual Transmission Oil
QU90003 Anaerobic Sealant
QU90006 3.35 oz Ultra Black RTV Sealant
QU90005 0.5 oz Ultra Black RTV Sealant
S24200 6ml Threadlocker
S9978 1 gram Threadlocker
QU90003 Anaerobic Sealant
QU90006 3.35 oz Ultra Black RTV Sealant
QU90005 0.5 oz Ultra Black RTV Sealant
S24200 6ml Medium Strength Blue Threadlocker
S9978 1 gram Medium Strength Blue Threadlocker
S9979 1 gram High Strength Red Threadlocker
S24026 High Temperature Threadlocker for Mainshaft Nut

Tech Note 5: NV4500 Tools
Need Torque Specs or Rebuild procedures? Order my 116 page, full color illustrated TM1003 NV4500 Rebuild Manual.

You will need some special tools to correctly service your NV4500 Transmission. The chart below lists our current NV4500 Special Tools for popular models.

Applications
Chevy and GMC:
C3500HD, C4500 with NV4500 5 Speed Manual Transmission and Transmission Mounted Parking Brake: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007