QU10016 Genuine NVG NV4500 5th Gear Fork

QU10016 Genuine NVG NV4500 5th Gear Fork is a New Old Stock (NOS) genuine New Venture original equipment replacement overdrive fork for all 1992-2007 GM and 1992-2005 Dodge NV4500 5 speed manual transmissions. USA Made.

Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project!

Dan the Gear Man® Tech Notes:
Fork Change
Shift Rail Locations
Inspect
Fork Location
Sealants
Matching Parts
NV4500 Tools
Applications

Tech Note 1: Fork Change
Very early in the production life of the NV4500 transmission, a slight change was made to the index position of the 5th Gear Fork. Other than a Tech Service Bulletin and a change in the Fork and Rail part numbers the change was inconsequential to those of us in the repair business as it only applied to 1992 model year transmissions. QU10016 Fork is the later design Fork with casting number 18937. If you have Fork needing replacement with casting number 18304, I recommend you also order QU10030 5th Gear Shift Rail OR QU10211 5th Gear Fork and Rail Assembly.

Tech Note 2: Shift Rail Locations
The New Venture NV4500 transmission has four shift rails, three of those, including the 5th-Reverse Rail are in the top cover. The fourth rail which is for 5th gear, is located partly in the transmission case, and it is controlled indirectly by the reverse shift fork through a connecting arm or lug.

Tech Note 3: Inspect
The front of QU10030 5th Gear Rail fits in a pocket bored in the transmission case. Always inspect the front of the rail for wear which can cause shifting problems if a step gets worn on the rail.

Tech Note 4: Fork Location
It is possible although not recommended to replace the 5th Gear Fork on any New Venture NV4500 transmission without removing the transmission from the vehicle. Remove the transmission extension housing from the transmission and you will be able to access the Fork which is located behind the main transmission case. QU10016 Fork is held in place on QU10030 Shift Rail by two mushroom head roll pins (see QK1109 Roll Pin Kit). The pins need to be driven up and out of the Fork. You will also need to remove the sliding clutch ring off the mainshaft 5th gear. I recommend you refer to my fully illustrated, step-by-step, TM1003 NV4500 Shop Manual for synchronizer service procedures.

Tech Note 5: Sealants
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.

Tech Note 6: Matching Parts
Matching Parts for QU10016 5th Gear Fork:
QU10030 5th Gear Shift Rail
QK1109 Roll Pin Kit
QU10211 5th Gear Fork and Rail Assembly
QU10039 5th Gear Synchronizer Clutch Ring or Slider
QK1102 Lock Ring Kit
QK1099 Synchro Strut Kit
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
QU90020 NV4500 Manual Transmission Oil
TM1003 NV4500 Shop Manual
VSG1003DVD NV4500 Overhaul Video
Chevy & GMC Shop Manuals
Dodge & Ram Shop Manuals

Tech Note 7: 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:
C1500, K1500, C2500, K2500, C3500, C3500HD, K3500 with NV4500 5 Speed: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C2500, K2500, C3500, K3500 Standard and HD Pickup based models with NV4500 5 Speed: 2000, 2001, 2002, 2003, 2004, 2005, 2006
C3500HD 15,000 Lb. GCVW Cab and Chassis with NV4500 5 Speed: 2000, 2001, 2002
C2500, K2500 Silverado Classic and Sierra Classic with NV4500 5 Speed: 2007

Dodge and Ram:
Ramcharger, D150, W150, D250, W250, D350, W350 with NV4500 5 Speed: 1992, 1993
Ram 2500, Ram 3500 with V10 and NV4500HD 5 Speed: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
Ram 2500, Ram 3500 with Cummins Diesel and NV4500HD 5 Speed: 1998, 1999, 2000, 2001, 2002, 2003, 2004
Ram 2500, Ram 3500 with gas V8 and NV4500LD 5 Speed: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005