QU10085 NV4500 35 Tooth Synchronized Reverse Gear

QU10085 Replacement New Venture Gear 35 Tooth Synchronized Reverse Gear is a replacement gear for 1997-2005 Dodge and 1999-2007 Chevy/GM New Venture NV4500 5 speed manual transmissions with synchronized reverse gear. Your matching Reverse Idler Gear will be about 1.5" wide (See QU10079). Imported.

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Dan the Gear Man® Tech Notes:
Upgrading 1997-1998 Chevy/GM NV4500 transmission
Early vs. Late Gears
Gear Damage
Tools
Conversion Info
Matching Parts
Lubricants, Sealants, Threadlockers
Applications

Tech Note 1: Upgrading 1997-1998 Chevy/GM NV4500 transmission:
QU10085 fits fully synchronized 1997-2007 New Venture NV4500 Transmissions. 1997-2005 Dodge and 1999-2007 Chevy/GM transmissions are fully synchronized for all gears including reverse. 1997-1998 Chevy/GM NV4500 transmissions were only synchronized in the forward speeds. You can upgrade your 1997-1998 Chevy/GM NV4500 transmission by replacing your original reverse gear parts with the following parts:
QU10022 or QU10085 35 Tooth Synchronized Mainshaft Reverse Gear
QU10710 or QU10204 Synchronized Reverse Gear Clutch
QU10003 Reverse Synchronizer Ring
QK1099 Synchro Strut Kit

Optional:
QU10050 Cast Iron Reverse Shift Fork and Pads to replace original aluminum fork
QK1095 Shift Fork Pads for QU10050 Fork

Tech Note 2: Early vs. Late Gears:
Early (1992-1996) and Late (1997-2007) NV4500 Mainshaft Reverse Gears are not interchangeable. When first introduced, the NV4500 Transmission had a dual-plane reverse where the power transfer path from the counter shaft to the mainshaft reverse gear is offset. The front half of the 2-3/4" long reverse idler gear engages the countershaft, while the rear half drives the mainshaft reverse gear. Since there are no teeth on the counter shaft below the mainshaft reverse gear, that gear can be larger diameter and have more teeth (39). The 1992-1996 transmissions have a 6.34:1 reverse for 1992-1994 Chevy/GM and 5.61:1 reverse for all Dodge and 1996 Chevy/GM.

Effective with the 1997 model year, New Venture NV4500's use a single-plane reverse where the power transfer path from the countershaft to the mainshaft is inline. The full working width of the narrow, 1-1/2" wide reverse idler gear is inline with both the countershaft gear teeth and mainshaft reverse gear teeth. Since the countershaft drive teeth are now located directly under the mainshaft reverse gear, the mainshaft reverse gear diameter had to be reduced to the point it now has only 35 teeth. Less teeth means less gear reduction. All 1997 model year and newer NV4500 transmissions have a 5.04:1 Reverse.

The difference in the transmission case reverse idler gear pocket and mounting boss for the single and dual plan reverse means the countershaft, mainshaft reverse gear, reverse idler gear, and reverse idler shaft are NOT interchangeable between early and late cases.

Tech Note 3: Gear Damage:
Reverse Gear tooth breakage is pretty rare with the NV4500. The most common problem is wear on the rear thrust face which is almost always caused by a loose mainshaft fifth gear and/or lubrication issues (dirty or incorrect oil). In advanced cases, the reverse gear needle bearing will fail and weld itself to the shaft or gear.

Tech Note 4: Tools:
Need Torque Specs or Rebuild procedures? Order my 116 page, full color illustrated 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.

Tech Note 5: Conversion Info:
NV4500 Transmissions are frequently used for conversion applications. The Table below lists the most popular rear output applications and their associated parts.

*Electronic, Screw-In Speedometer Sensor
**22 Tooth Mainshaft 5th Gears listed for 1992-2005 Dodge and 1995-2007 Chevy/GM with 5.61:1 1st gear ratio. 1992-1994 Chevy/GM with 6.34:1 first gear ratio use 19 Tooth QU10728 Gear. QU10728 is NOT compatible with Dodge 29 and 31 Spline Output Shafts!

Tech Note 6: Matching Parts:
QU10022 New Venture OE 35 Tooth Synchronized Mainshaft Reverse Gear
QU10710 or QU10204 Synchronized Reverse Gear Clutch
QU10039 Sliding Ring or Sleeve for Reverse Gear Lockup
QU10003 Reverse Synchronizer Ring
QK1099 Synchro Strut Kit
QU10058 Reverse Gear Bearing
QK1098 Teflon Bearing Spacer Kit
QU10192 and QU10707 Countershafts
Mainshafts: See Tech Note
TM1003 NV4500 Shop Manual
V1003DVD NV4500 Overhaul Video
QT2000 29 Spline Shaft Wrench
QT2002 Mainshaft Nut Wrench GM 4x4 and Dodge Light Duty
QT2001 Mainshaft Nut Wrench, 1/2" Drive Dodge Heavy Duty
QT2028 Mainshaft Nut Wrench GM 4x4 with Vibration Dampener
QT2036 Mainshaft Nut Wrench, 3/4" Drive Dodge Heavy Duty
Chevy & GMC Shop Manuals
Dodge & Ram Shop Manuals

Tech Note 7: 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 V1003DVD 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

Applications:
Chevy and GMC:
C1500, K1500, C2500, K2500, C3500, C3500HD, K3500 with NV4500 5 Speed: 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:
Ram 2500, Ram 3500 with V10 and NV4500HD 5 Speed: 1997, 1998, 1999, 2000, 2001, 2002, 2003
Ram 2500, Ram 3500 with Cummins Diesel and NV4500HD 5 Speed: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Ram 2500, Ram 3500 with gas V8 and NV4500LD 5 Speed: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005