padam
Well-Known Member
Last Sunday I broke my rear end on the starting line at Magnolia Drag Strip.
I figured the gears broke, but I got it tore down today, and there's so much damage it's hard to tell what went first.
1 bearing cap is completely blown apart, the other is broken.
Missing a few ring gear teeth.
Specs below for reference.
489 case
Richmond 4.56 gears
Dr Diff 35 spline spool and axles
73 Charger appx 3700 with driver.
413 engine, fresh rebuild, hft cam
Holley 750 vac secondary, headers etc
4 SPEED TRANS 23 spline
Slicks 28 x 10.5 /15
4000 rpm launch
1/8 mile best 7.71 ET, best 90 MPH
This thing only probably had 25 hard launches where it hooked good.
I was about 1/2 second slower for years, and running a 742 case with sure grip, and the only failure I had was a broken stock axle. So I'm thinking I may have been right at the limit there.
I figured the gears broke, but I got it tore down today, and there's so much damage it's hard to tell what went first.
1 bearing cap is completely blown apart, the other is broken.
Missing a few ring gear teeth.
Specs below for reference.
489 case
Richmond 4.56 gears
Dr Diff 35 spline spool and axles
73 Charger appx 3700 with driver.
413 engine, fresh rebuild, hft cam
Holley 750 vac secondary, headers etc
4 SPEED TRANS 23 spline
Slicks 28 x 10.5 /15
4000 rpm launch
1/8 mile best 7.71 ET, best 90 MPH
This thing only probably had 25 hard launches where it hooked good.
I was about 1/2 second slower for years, and running a 742 case with sure grip, and the only failure I had was a broken stock axle. So I'm thinking I may have been right at the limit there.