borgwarner and 8 3/4 questions
08-08-2016, 03:44 AM
#1
Mopar Fanatic
Thread Starter
borgwarner and 8 3/4 questions
Hey guys
Over here in Australia our Mopars have a light duty bw78 BorgWarner 25 spline diff set up. I am now at around 450 rwhp and starting to break axles. I have a couple of choices. I can install a truetrac which I think you call a Detroit locker. The one to fit my diff is a 28 spline and I will need to install billet axles. This way I will not have to change the diff. Here is a link
http://www.tuffcarparts.com/index.ph...roduct_id=1581
Or I have been offered a 30 spline 8 3/4 diff. It will be set up with the cone style lsd and gears I want. It will fit into my car with next to no modification and will have bigger drum brakes than my diff now and 1/2 inch studs where mine are 7/16 now. My only concern is the 8 3/4 diff is a very old set up and I don't know anything about them. Are they a great strong diff and is the lsd up to the task?
cheers
Over here in Australia our Mopars have a light duty bw78 BorgWarner 25 spline diff set up. I am now at around 450 rwhp and starting to break axles. I have a couple of choices. I can install a truetrac which I think you call a Detroit locker. The one to fit my diff is a 28 spline and I will need to install billet axles. This way I will not have to change the diff. Here is a link
http://www.tuffcarparts.com/index.ph...roduct_id=1581
Or I have been offered a 30 spline 8 3/4 diff. It will be set up with the cone style lsd and gears I want. It will fit into my car with next to no modification and will have bigger drum brakes than my diff now and 1/2 inch studs where mine are 7/16 now. My only concern is the 8 3/4 diff is a very old set up and I don't know anything about them. Are they a great strong diff and is the lsd up to the task?
cheers
08-08-2016, 03:41 PM
#3
Super Moderator
GO with the 8 3/4 but lose the cone diff unless it checks out.
08-09-2016, 04:33 AM
#4
Mopar Fanatic
Thread Starter
thanks guys
I will look at the currie website but I am in Australia so shipping will kill it for me I think.
If the cone lsd doesn't check out what are my options
I will look at the currie website but I am in Australia so shipping will kill it for me I think.
If the cone lsd doesn't check out what are my options
08-09-2016, 05:49 AM
#5
Mopar Lover
Kind of needs to fit the budget I would think? So think about the 8-3/4...
But it looks to me like their might be more parts for the ford 9" down under?
Not to sure what brands are being sold that you can get parts for easily?
If a Dana is acquirable? go that route...
But it looks to me like their might be more parts for the ford 9" down under?
Not to sure what brands are being sold that you can get parts for easily?
If a Dana is acquirable? go that route...
08-09-2016, 05:52 AM
#6
Mopar Lover
Also, Might look at Doc. Diff. for some parts? no sure witch way your going to go?
http://www.doctordiff.com/
http://www.doctordiff.com/
08-09-2016, 01:55 PM
#8
Super Moderator
Not sure what is available down there, but the Ford 8.8 has become more available than the the 9" in the the state's I'd go with the 8.8 Ford.
That said , down under, if an 83/4 fits your hit and your budget, ride go for it!
That said , down under, if an 83/4 fits your hit and your budget, ride go for it!
08-09-2016, 04:13 PM
#9
Mopar Lover
I don't know why people don't like cones, I prefer them. Had a friend with 800 hp with trans brake drag race only car, at this level he started breaking 8 3/4" cases and regretted he didn't build a Dana from the start.
My concern with extreme use would be the length and the need for back bracing.
My concern with extreme use would be the length and the need for back bracing.
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