Installing HPI's aluminum drive gear

Tech tips for the Savage can be found here.

Moderator: Moderators

Post Reply
Savaged
Savage Extraordinaire
Savage Extraordinaire
Posts: 781
Joined: Wed Feb 26, 2003 12:00 am

Installing HPI's aluminum drive gear

Post by Savaged » Tue Jul 01, 2003 9:15 pm

I just received a pair of HPI's lightened aluminum drive gears from the SC store (thanks "O" for the fast shipment) and took my spare transmission apart to do the install. While i was at it, I also decided to do a dual disc mod to the spare tranny using a set of Vertigo Performace Carbon Fiber Discs.

Picture 1 showing an illustration of incoming and outgoing parts in the tranny

Image

The aluminum drive gear is MUCH noticably lighter than the hardened metal stock gears. Less rotating mass to spool up should result in faster accelleration. Since they mesh with nylon gears, durability shouldn't be an issue.

Image


Upgrading to the aluminum drive gears is super easy. Once the transmission of out of the truck- you'll need to remove both transmission output shaft drive cups (and brake components), split open the case, and remove both the output shaft and mainshaft.


Image

With those components out of the way, all you'll have left in one of the case halves is the input shaft (with the metal gears you'll be replacing). Removal of this gear is very simple. Using a small flat screwdriver, carefully pop out the C clip at the end of the input shaft. Once the C clip is removed- all you'll need to do is slide out the plastic tube spacer, and the metal gears themselves. Replace with the ligher aluminum set and reverse the disassembly procedures and... That's it!!

You can easily perform the Dual Disc Modification while the tranny is out of the truck. Here are some helpful links regarding the dual disc mod. You can also perform additional modifications to the tranny while its apart- found here: Tranny Basics.

Image


Good luck and have fun !

Savaged
Last edited by Savaged on Sun Sep 07, 2003 7:54 am, edited 2 times in total.
Mirrors only show how much more work needs to be done...

<img src="http://www.savage-central.com/banners/468x60banner.gif">

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar
savageer
Savage Extraordinaire
Savage Extraordinaire
Posts: 2655
Joined: Fri Mar 28, 2003 12:00 am

Post by savageer » Tue Jul 01, 2003 10:01 pm

That is a great tip Savaged :D Thanks for posting such great tips :P
Blow up your Tmaxx, buy a savage!!!

[img]http://savgraphix.oarie.net/savageer.jpg[/img]

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar
sfgascott
Site Moderator
Site Moderator
Posts: 5099
Joined: Sun Mar 02, 2003 12:00 am

Post by sfgascott » Tue Jul 01, 2003 10:44 pm

Nice article 8) I did this mod and I was surprised at the difference in weight between the two gears. 11 grams vs 27 grams. It should make a difference.

Scott
[color=indigo][size=150]Bashing in Tuttle, Oklahoma[/size][/color]
[img]http://i16.photobucket.com/albums/b37/sfgascott/banners/newbanner6.gif[/img]

Link:
BBcode:
HTML:
Hide post links
Show post links

Savaged
Savage Extraordinaire
Savage Extraordinaire
Posts: 781
Joined: Wed Feb 26, 2003 12:00 am

Post by Savaged » Wed Jul 02, 2003 1:23 am

Yup! I didn't have anything to weigh it with but there is an obvious difference just by feel... Should make a noticable difference :wink:

Savaged
Mirrors only show how much more work needs to be done...

<img src="http://www.savage-central.com/banners/468x60banner.gif">

Link:
BBcode:
HTML:
Hide post links
Show post links

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests