Pro gear life

[Dana Fitzpatrick]

I have a 3300lb,9 inch tire 68 Camaro,4-speed, that I shift w/o the clutch.Runs mid to high 9's. It has a complete Strange 12-bolt,spool,pro gears, support cover.I'm looking for estimates on gear life and what to look for when I pull the cover off.As always,thank you.

Originally Posted by Dana Fitzpatrick

I have a 3300lb,9 inch tire 68 Camaro,4-speed, that I shift w/o the clutch.Runs mid to high 9's. It has a complete Strange 12-bolt,spool,pro gears, support cover.I'm looking for estimates on gear life and what to look for when I pull the cover off.As always,thank you.

What gear ratio? Big or small block? I ran 4.88's they lasted around 75 runs with the stick. When I pulled the cover, the teeth started developing cracks on the ring gear. 3400 pound car leaving around 5k. Running 10.60's

[Don Anderson]

Try these guys for gears:

Dewco

(765) 962-7201

[Dana Fitzpatrick]

Originally Posted by Todd Hoven

What gear ratio? Big or small block? I ran 4.88's they lasted around 75 runs with the stick. When I pulled the cover, the teeth started developing cracks on the ring gear. 3400 pound car leaving around 5k. Running 10.60's

Big block,4.56's.I leave between 5400 and 5900,soft-loc clutch.

[Dwight Southerland]

You might also talk to Tom's Differentials in ID - http://www.tomsdifferentials.com/


HIs heat treating process usually doubles 12 bolt gear life. Cracks on the ring gear teeth are not as much to be concerned about as cracks on the pinion.

[Dave Casey]

I just replaced my Richmond 4.56 12 bolt pro gear, 3250 lb bbc stick, no special treating, carefully setup originally. low 10 sec stocker I got over 250 runs out of it. I like to set them up about .001 deep, keep the pinion bearing on the high side preloadwise, and usually .003-.005 lash

hope that helps

[Don Anderson]

Try Mach Development for gear coating.
520-568-3511