High Strength Collar Gear - 6spd M66 Version
High Strength Collar Gear - 6spd M66 Version
High Strength Collar Gear - 6spd M66 Version
High Strength Collar Gear - 6spd M66 Version
On Sale

High Strength Collar Gear - 6spd M66 Version

Regular price $ 359.95

5/1/2023 UPDATE - Thanks to everyone that participated in the group buy!  The group buy is over.  If you missed out, send me an email and I'll let you know when it'll be in stock again.

At typically over $1000 per replacement including labor, and some reportedly needing more than one before they've hit 100k miles, this expensive problem has finally been dealt with. Install this collar gear as a preventative measure and let your drive train worries slip away.

I can not guarantee fitment on a worn transmission output gear or angle gear input gear so don't wait till it fails!  However, one of the prototypes was recently installed on a car with a failed OEM collar and he had this to say...

  • "...it feels stronger & heavier, tighter fit, correct Volvo gaskets - I'm happy to support this new collar..."  See the reviews here.

Ryan's personal log:  80,000+ miles from June 2013-2019.  Likely over 3 million combined miles with the over 200 units sold.


  • High strength and heat treated material to a specific Brinell hardness that is appropriate for a transmission gear
  • Nitride heat treat (estimated 60% increase of UTS compared to OE)
  • Custom fit, not to OE clearances
  • Designed and manufactured in Pennsylvania, USA
  • None of the necessary OEM seals or the retaining ring are included.  You will need to order qty. 1 of each from any site/dealer...
    • 977101 - internal snap ring
    • 1161748 - spline joint grease
    • 976041 - green o-ring
    • 9143885 - drive shaft seal
    • 9143911 - 75mm trans output shaft seal
    • 30735126 - 65mm transfer case seal


Compatible Vehicles

  • 2004-2007 S60R/V70R AWD 6MT (manual) transmissions
  • 2004.5 - 2010 S40 CH -452736 and V50 CH -472491 T5 models with AWD 6MT (manual) transmissions