Information

Contact: Roger Reynolds @ (573)248-2149

E-Mail: rreynold@nemonet.com

Identifying the transmission

These gears can be changed out in 20-30 minutes with practice!, however, it is advised to spend more time installing the first one to familiarize yourself with the installation. Pay close attention to the few but very important details involved. You can then install gears for the Race Tracks and remove them for normal operation.

The Bi-Product of Road Rage Gears is that they will not effect gas mileage in town but will on the highway. MPH reading will most often read in the area of 10mph fast and Road Rage Gears does add a touch of gear drive noise.

Website Photos are installation references....Alternative Installations - Have a Transmission Shop install the gears or recruit an experienced transmission mechanic to install them.

First, Identify your transmission! These gears only fit the 604 or 41TE. All overdrives with motor facing front passenger and rear transmission cover facing drivers side is a 604 overdrive. The photo below will help you in identification.

Click on photo to enlarge!

Installation Procedure:

To Begin:

• Elevate Vehicle with either Lift or Floor Jack (Make sure vehicle is Secured!!)
• Remove front driver-side wheel and plastic dust cover exposing transmission gear cover.
• Oil will be lost - use appropriate clean container to catch fluid and be sure to leave selector in neutral.
• Remove Pan Bolts (Photo #2)
• 
•  Factory uses silicone instead of a gasket so a prying will be needed to pry off pan. A regular screwdriver usually does the trick. Try not to scar the Aluminum Casing, however, if this happens, make sure extra silicone is rubbed in to assure a good seal.
• Some 604 units have nut retainers. Use a screwdriver to bend back the tabs and remove 2 bolts per gear if equipped and remove the 1 1/4" nut and 1 1/2" bolt with half inch drive impact wrench (Photo #3). Sometimes these are difficult due to factory locktight (Photo #4).
•  
• Install Puller (Picture #5) - use correct bolt to attach the two drilled and tapped holes in the factory gears (DO NOT impact these bolts in) - simply FINGER TIGHTEN or damage to the bearing cage could result. Use thread protector with puller and note there is a select bearing spacer. Keep these spacers to install back to same shafts. Both gears will have one.
• 
• Next item....Scrape off all old Silicone. Use hand file or hand grinder to remove 1/8" of material for large gear to clear (Photo #6).
• 
• Note....Large gear bearing race will gladly fall out of place during installation. Take note of how the bearing race needs to fit the case. Notched area in case must have notched area of bearing race (See green arrows in Photo #6) line up in place. Clean area and bearing race. Using Silicone in upper area, glue bearing in place.
• While the bearing race is drying, installation of the small gear can begin.
• Explaining pre-loading of the tapered bearing can be difficult but getting this section of the installation right is more important than anything else! Spending time the first time and getting it right is a worthwhile effort  and knowing how many shimsare needed will allow for much faster times of installation in the future.
• The most fool-proof way to correctly install the gear and get the correct bearing preload (also the most time consuming) is to install the bearing spacer and add 7 or 8 shims from the shim kit (locate them between the gear and the bearing spacer). Install gear, bolt and washer and impact them down. Then, check the gear for free rotation (Photo #7). If it is BOUND up, remove the gear and ADD 1 shim at a time until free rotation is achieved. If the 7 or 8 shims you added ALLOWS free rotation, REMOVE one shim at a time until it binds then add one shim to get free rotation. Now you will have the correct bearing preload.
• 
• Throughout the small gear setup, continue to make sure the bearing race you siliconed in stays in place as it could move out of place during impacting.
• Add a drop or two of oil on the gear bearings before you install them.
• Installation of the second gear is the same.
• Due to gear and bearing inconsistencies, the Factory uses a single select bearing spacer. Often, no shims are required at all but this is a CRUCIAL detail that must be correct!
• Once both gears are installed, recheck for free rotation. If nut retainers were used and you decide to reinstall them, lightly snug them up and re-bend the tabs to secure them.
• Re-clean the pan to case surface. Add a bead of silicone and install the pan. Add washers to the bolts. Once all bolts are in, tighten a couple down to the point where you can still move the pan (this is a tight clearance fit)! Move the pan from side to side and up and down bumping the large gear. Use this as a scale to create the clearance around the gear (this pan is all we can produce at this time but we will have other alternatives soon).
• Hold the pan in place and tighten two bolts to keep it in place then tighten the rest. Add plastic dust cover and tire then add lost fluid (make sure you re-check fluid). Installation complete!
• Note: These gears have a touch of a whine and even more backlash whine!
• If the large gear is touching the cover, loosen the bolts and try tapping the cover in the needed direction to correct it.
• When reinstalling the original gears, be sure to keep track of the shims that were needed on the race gears! Next time installation should only take 20 to 30 minutes!
• ANY QUESTIONS?? Call 8- 5 CST
• Roger Reynolds - (573) 248-2149