Hey is anyone using m factory 3rd and 4th in a stock tranny around 750 hp and up b series

 

I have customers that run the 3/4 and 1-4 in their built transmissions with 750-850whp. The Pro Synchro set is only rated for 700whp though.

 

How do they hold up how many passes are they getting have they broke any gears

 

Holding up good. Not sure total number of passes on all of them. One broke 1st gear.

 

4th gear broke at <600 Wheel. Closer to 500 WAY closer. H Pro set.


5-6 Track hits, and maybe 10 street pulls. Set was less than a month old. they did replace the gears, but meh... Take it for what its worth. They ARE breaking.

EVERYTING will break after time, but at 500 on a set thats rated for 7 and not an isolated incident... IDK.