QU10079 1997-2007 NV4500 Reverse Idler Gear

QU10079 1997-2007 NV4500 Reverse Idler Gear fits single-plane, 5.04 ratio reverse gears on all 1997-2005 Dodge and 1997-2007 GM New Venture NV4500 5 speed manual transmissions. This new takeout, genuine NVG gear is from new transmissions we disassembled for parts. 15 tooth Gear has an approximate length of 1-1/2". Your matching Mainshaft Reverse Gear, must have 35 teeth. 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:
Specs
Single-Plane Reverse
Common Causes of Failures
NV4500 Tools
Matching Parts
Applications

Tech Note 1: Specs
QU10079 is a 15 tooth Reverse Idler Gear that is approximately 1-1/2" long. It can be used in any 1997-2007 New Venture NV4500 5 speed transmission. The reverse gear ratio is 5.04:1.

Tech Note 2: Single-Plane Reverse
1996 and earlier Early NV4500 transmissions utilized a two-plane reverse with either 5.61:1 or 6.34:1 Reverse Gear ratios. With a two-plane reverse, the front half of the wide reverse idler gear receives power from the countershaft and it uses the rear half to transfer power to the large diameter mainshaft reverse gear. The 5.04 ratio Single-plane reverse was introduced for 1997 model year trucks. The power transfer is inline between the countershaft, narrow reverse idler gear, and small diameter mainshaft reverse gear. The reverse idler gears, reverse idler shafts, countershafts, reverse gears, and transmission cases are not interchangeable for the two types of reverse gear systems.

Tech Note 3: Common Causes of Failures
NV4500 Reverse Idler Gear breakage is fairly rare, when it does occur, it is usually caused by pieces of other broken gears (usually 3rd Gear) causing the damage. Damage to the bearing bore inside the gear is a bit more common. Bearing bore wear is almost always caused by operating the transmission with incorrect or contaminated oil. The reverse idler gear is in constant contact with the countershaft so it is rotating any time the input shaft is turning. Crud in dirty oil can quickly damage the small needle rollers that support the idler gear. Installing a manual transmission filter kit can help rid your transmission of magnetic and non-magnetic debris and thereby reducing the chance of premature transmission failure.

Tech Note 4: 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.

Tech Note 5: Matching Parts
Matching Parts for QU10079 Reverse Idler Gear:
QU10041 Reverse Idler Shaft
QU10019 Reverse Idler Gear Bearing
QK1101 Reverse Idler Gear Thrust Washer Set
QU10074 35 Tooth Non-Synchronized Mainshaft Reverse Gear for 1997-1998 GM
QU10022 35 Tooth Genuine NVG Synchronized Mainshaft Reverse Gear
QU10085 35 Tooth Replacement Synchronized Mainshaft Reverse Gear
QU10192 and QU10707 One Piece Countershaft for 1997-2007 NV4500
NV4500L 1997-2007 NV4500 Transmission Case
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
TM1003 NV4500 Shop Manual
VSG1003DVD NV4500 Overhaul Video

Applications:

Chevy and GMC:
New Venture NV4500 5 Speed Manual Transmission: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007

Dodge and Ram:
Ram 2500, Ram 3500 with New Venture NV4500 5 Speed Manual Transmission: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005