confused axle

[gniknayrb18]

i was reading another thread and thought i had a 7 1/4 rear end but after reading it i counted 10 bolts.... its a 72 demon that had a /6 and it had a gear tag of 2.45

 

[gniknayrb18]

i cant take a good pic of the axle because the gas tank is in the way

 

[Bad Sport]

Look at the cover and compare it to the chart in the other thread. 7 1/4 and 8 1/4 are shaped differently.

 

[gniknayrb18]

i cant see the cover only about 2 inches of clearance there are those numbers useless

 

[Bad Sport]

Now I'm confused, you said in the other thread you counted ten bolts, in order to do that you would need to see the shape of the housing and cover.

 

[Inertia]

I googled that and got

2852905 8-1/4" into my Dart??? HELP!! - Mopar General Discussions ...



www.forabodiesonly.com › ... › Mopar General Discussions‎

• Cached

Sep 10, 2010 - 3 posts - ‎3 authors
I recently got ahold of a 2852905 casting 8-1/4" rear end. It is complete with a 3:21 gear ratio, and is exactly what I want for the Dart. 69-70 8.25 need help/info please - Transmission and ...
25 posts
17 Aug 2012

Help Identifing what year 8 3/4 rear end ...
24 posts
23 Jun 2011

REAR DIFFERENTIALS... Mopar - Tech archive ...
2 posts
17 Mar 2009

2.45 gears?? - Transmission and Drivetrain Tech ...
14 posts
8 Mar 2008

More results from www.forabodiesonly.com

hope it helps

 

[gniknayrb18]

i felt up in there i had to squeeze my hand in there and feel around i just went and double checked and there are 10 bolts and its pretty rounded no flat ends so im guessing its a 8 1/4 but does the gear ratio sound right

 

[gniknayrb18]

so wait is that not the stock rear end lol

 

[Bad Sport]

Well if you want to be absolutely sure just jack up the rear of the car so you can see it. Sounds like an 8 1/4 to me.

 

[gniknayrb18]

ok next question lol i know that the 2.45 gears are less desirable and i want something better so what would it take to put better gears in it and what would be a good ratio for a high performance 340

 

[Inertia]

Under Transmission and Drivetrain Tech--

Please tell me what parts interchange between the 2.45/2.25 vice 2.71->up 8 1/4 axle

http://www.forabodiesonly.com/mopar/showthread.php?t=244330&highlight=1/4+interchange

also

http://www.forabodiesonly.com/mopar/showthread.php?t=242258&highlight=1/4+interchange

hope it helps

 

[1970Duster]

You'll need a different 8.25 housing (2.76 and higher have a different housing). You should be able to find one pretty easy if not the 8.75 is always a better option. That or go full out Dana 60.

 

[Inertia]

I'm pretty sure the housing will work,, the carrier has different offset in the 2.71 and up..

Rusty covers that in one of those links..

I'll be finding out first hand in a coupla weeks.. got a 3:55 and sure-grip outta 80's pick-up, going into 74 8 1/4.. I hope.. lol

 

[gniknayrb18]

ok so now im confused lol will it or wont it work say if i wanted a 3.90

 

[Inertia]

Lol.. ya know,, I was about to "paste" the answer to your question, from the link I posted,, but .... oh . . .

oops.. almost forgot..

hope it helps.. lol

 

[Oklacarcollecto]

ok so now im confused lol will it or wont it work say if i wanted a 3.90

Housing and axles will work but the carrier will not work.

 

[inkjunkie]

5.17

 

[gniknayrb18]

what is 5.17