65Vart
Well-Known Member
I have bothe a 489 case with 3:23 open as well as a 741 case with a 3:91 SG. Two questions here, will the 3:91 s fit in the 489 case? and is there any difference in the Dshaft lenth between the two (489 and 741).
I have bothe a 489 case with 3:23 open as well as a 741 case with a 3:91 SG. Two questions here, will the 3:91 s fit in the 489 case? and is there any difference in the Dshaft lenth between the two (489 and 741).
I may take you up on it when I wrestle the 8 3/4 into place. It's beside the car right now with now room to spare and a heavy &^&$. I know you are busy with work and the 66 right now. Thanks bud.Hey Wally,if you need any help?I,m just a phone call away.Tools,jack,stands,brakes anything.?:cheers:
Thanks, I was refering to getting the assy positioned at the rear of the car on a floor jack. My garage is small and it is beside the car on a stand I made. Thanks for the tip though. I may swap out the leafs as well and raise it into place as one piece.wrestling the 8 3/4 into place... if you are swapping the whole rear, drop the spring shackles do the back of the springs are laying on the ground, slide the rear end in from the back of the car... bolt it onto the springs (loosely) and go from there....
do you want to switch to the 3.91s? If so just use it , you won't break it and if you do you need to upgrade to a Dana 60 .
All 8 3/4s have the same weakness , the GEAR TEETH , you can upgrade , back brace , put in race axles and a spool, they all eventually break in the same place .
Must be the same weaknest for the dana then,cause' i saw a guy rip the gear teeth off on his dana last year...