QU10109 Orange Color, Light Compression NV4500 Shift Cover Poppet Spring. Not a common part requiring replacement, but sometimes these springs do weaken causing the transmission to jump out of gear when the poppet does not keep the shift rail in position. USA Made.

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Dan the Gear Man Tech Notes:
Springs
Tech Help
Matching Parts
Lubricants, Sealants, Threadlockers
NV4500 Tools
Applications

Tech Note 1: Springs
The three shift rail poppets have individual springs that put tension on the shift rails. Due to machining differences in the top cover poppet bores, there is a choice of three color-coded springs with different spring rates that can be used to change the poppet pressure and shift resistance.

QU10109 Light Compression Orange Color Poppet Spring
QU10110 Medium Compression Green Color Poppet Spring
QU10108 Heavy Compression Natural Color Poppet Spring

Tech Note 2: Tech Help
The shift cover on NV4500 transmissions was not designed to be disassembled. No factory provisions are provided for removing the 1-2 and 3-4 forks and rails. That does not mean it cannot be done. My fully illustrated, step-by-step, TM1003 NV4500 Shop Manual details proven service procedures for NV4500 shift cover disassembly and reassembly on pages 72-84.

Tech Note 3: Matching Parts
Matching Parts for QU10108 NV4500 Poppet Spring:
QU10219 1-2 Shift Rail
QK1145 Late Top Cover Service Kit for 1996-2007
QK1106 1992-1995 Top Cover Shift Rail Kit
QK1107 1996-2007 Top Cover Shift Rail Plug Kit
QU10222 Top Cover Small Parts Kit
QU10186 Plunger, Shift Rail Detent Poppet Except 2002-2007 GM
QU10110 Poppet Spring, Green Medium Compression
QU10108 Poppet Spring, Natural Color High Compression
QU10160 Top Cover Oil Baffle
QU10230 3-4 Shift Rail except 2002-2007 GM
QU10080 Reverse Shift Fork for 1992-1997 Covers with Integral Shift Towers
QU10050 Reverse Shift Fork for 1994.5-2007 Covers with Bolt-On Shift Towers
QU10220 5th-Reverse Shift Rail
QU10262 Bare Cover Plate for 1992-1997 Transmissions with Integral Shift Tower
QU10263 Bare Cover Plate for 1995-2007 Transmissions with Bolt-On Towers

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 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:
All with New Venture NV4500 Transmission: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007

Dodge and Ram:
All with New Venture NV4500 Series Transmissions: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005