Anyone running one, on anything?

Thinking bout running one on the Harley, any thoughts


Oh I figured out my garage on here!

 

Why, don't you have the 8.8 in there???

 

8.8's are plenty strong enough. Thats whats under Mustangs and theres quite a few high hp drag Mustangs still running an 8.8.

 

I actually have a 9.75...

I had an 8.8 under the maroon truck and it took a beating, it had a bent axle shaft when it was removed.

I don't think the 8.8 would hold up that well under the torqe and weight of the harley though, it'll be a 9" that replaces the 9.75, mainly due to weight!

Just curious if anybody has any expierance with one.

 

8.8's can be built to handle a lot more hp than you will be putting out with the harley... As far as anybody having experience, yeah, check with almost anyone running a chevy drag car (that has any kind of hp)... 9's are generally for massive amounts of hp but are pretty darn expensive to build... I was thinking that you already had the 8.8, it is just easier to build that if you already have the case... Check out Curry, they can build you something that will handle up to about 2000hp...

Also, here is a build up on the 9.75:

http://www.fourwheeler.com/techartic...ild/index.html

 

If by nine inch you mean the semi-floating axle removable carrier differential used in the seventies, no.
The advantage to the "chunk" differential is the ease of maintenance, changing gear ratios and so forth. The pinion shaft runs in three bearings, another good feature. Another is the ease of disassembly; the axles are removed by removing four nuts that hold the axle bearing retainer to the axle flange and then pulling the axles straight out, wheel bearing and all. The wheel bearings are pressed on to the axle shaft and an oil seal is installed inboard of the bearing. Once the axles are removed, the chunk differential can be pulled and plunked on the bench by removing the dozen-or-so bolts that retain it to the front of the axle housing. There is no removable differential cover in the assembly.

The only recent application I've see using a Ford Niner was a 3.96:1 locker on the rear end of a turbodiesel '82 Chevy C10 tricked up for the drags. The engine made 850lb/ft of torque through a trans-brake T400 tranny. That amount of torque was amplified by the torque converter and 1st gear ratio.....about 4:1, giving 3400lb/ft to the pinion shaft.

 

Thanks man^^^^^thats more of the info I was looking for.



I have a ford 9" under my parts car for my 70 Torino, which I believe is the big bearing, not sure until i tear it down.

I'll put disc brakes on it and learn how to wrench on one, then I'll spend the $$$ for a nice setup.