It looks like I ended up with an open diff in my 4x4, just my luck!!! I have a brand new spicer lsd I can put in it that I bought for my old truck that I tore the r&p out of a few times. Ended up going with a jasper trade unit in that truck. Im pondering selling my full axle & the new lsd & buying a 01.5 or 02 dana 80 with an lsd, disc brakes, 3.55 gears & having the better of both worlds (99 is drums). Will a dually unit work & are there any issues with the brake lines, porporsioning valve or anything else. I plan on racing this truck some & am curious if anyone has raced in 4wd with an open rear diff & if an open diff is weaker than having an lsd. Thanks for any feedback.

 

The dually unit is 5" wider.

 

anyone have problems with d70 with open diff. or even posi. If im bound to have problems with a d70 as I did before Im thinking stepping up to a d80 is a good idea.

 

The strength should be the same between open-diff and LS diffs,If I were drag racing I think I'd use a detroit locker,if they have those for the bigger rear ends,I'm thinking bigger=better most times,just find you a Dana 80 if ya can,not sure about the brake issues though,like blackdiesel said,5" wider for the dualy rear end.

 

i was pretty bummed out when i found open diff in my truck.i'd like to source an lsd myself