Mopar 8 3/4 VS 8 1/4
 

Can I expect a gain in ET buy switching from one to other if using the same gear ratio? How about overall weight?

Re: Mopar 8 3/4 VS 8 1/4
 

8 1/4 will be easier to break.

Re: Mopar 8 3/4 VS 8 1/4
 

I broke an 8 1/4 with a warmed over slant six and a 4 speed but it was not a posi unit. With a locker and aftermarket gears it might live behind an automatic but in my opinion it's not worth the weight savings,

JimR

Re: Mopar 8 3/4 VS 8 1/4
 

Not worth the trouble! You *will* break the 8 1/4 ! Jim

Re: Mopar 8 3/4 VS 8 1/4
 

I read a long time ago that Bob Lambeck ran an 8 1/4 in a Duster 360 stocker but I don't know how long it lasted...

Re: Mopar 8 3/4 VS 8 1/4
 

Does anyone or did anyone make a spool for a 8.25? I don't think so, but I could be wrong. If you do go the 8.25 route, you will have to get the right suregrip unit to fit your application. I have a NOS one in the garage since I bought two for my warlock just in case I needed it.

Axles are another concern here too. Not sure how strong the factory original units were/are after 25 and more years.


Eric

Re: Mopar 8 3/4 VS 8 1/4
 

Eric, does your Dakota have an 8 3/4 in it?

Re: Mopar 8 3/4 VS 8 1/4
 

I know some that made a spool themselves back in the days and got it to last a long time in a 360 duster stocker...but it finally gave in and had to leave room for a 8.75..the gear selection isn't very good...a 4.56 looks like "top of the line"!

Re: Mopar 8 3/4 VS 8 1/4
 

I ran a 8 1/4 for years in a 72 Duster 340. Broke one tooth once on ring gear. Car ran mid 11's in "stocker trim". Full interior all steel. I think it is less hassle with 8 3/4 being able to use a spool and not have to replace the Posi in the 8 1/4 every few years or so. I did change to an 8 3/4 but made a gear change so I can't say if one is faster.

Monty

Re: Mopar 8 3/4 VS 8 1/4
 

:)I think Jim Durham ran a 8.25 in his F/SA til a couple of years 'l ago...If you equalized the weight I used to be .01 faster with 8.25 but hardly worth to trouble. I will give you a housing for free if you get my way again. PS I lost your number again.:):)




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