2500 hd rear end

[69K5]

I found a rear end out of a 2003 chevy 2500 hd diesel at the u pull it. they want 170 for it. should i get it for my 69 blazer? anybody know spring perch widths, ratios, rim difference?, ect ect . its an 8 lug version. My front ends are 3.73 and 4.56 so i hope its one of those.

thanks for the suggestions

69k5

 

[69K5]

they also had a 14ff in a truck and something else in a crew cab. both for $70. it was a dod truck and had massive drums on it. maybe 14 inch drums. it said 3+3 on the side but it didnt look like a dually rear to me. i wanted to say d70 but i could not find any numbers on it that said D anything. how do I know what it is?
oh yeah drum turns over 1 complete time to 2 full turns of the yolk. I forgot how to get the ratio from that.

and I hate to ask but would any ford 8 lug rear ends work? they had tons of those.

thanks

69k5

 

[69K5]

the truck had the allison automatic in it if that makes any difference.

 

[89GMCSuburban]

That newer axle is an 11.5" axle. Same shafts as a 14 bolt in thickness. Locker selection is nill, there's a few people that actually make gears for it. I'd stay away...too new and the aftermarket just doesn't make stuff for it.

I'd just get a 14FF or the D70.

 

[neverendingproject]

If it was a gas motor, then they only come in 4.10. If it was a diesel they came in 3.73, 410, and I think 4.56. Ive seen a locker for the 11.5 axle, but it was expensive. Like the 89gmc said, I would go with an older 10.5

 

[Seventy4Blazer]

if it is out of a diesel it will only be a 3.73 rear end....

thats a HUGE rear end that you will never need the beef and extra weight of. a 14 bold will cost less, have the right spring perches and width. the new axle would be nice with the HUGE brakes but the 14 bolt is easily updated to disks.

Grant

 

[69K5]

I already have a disc brake set up for my old eaton. I can just swap it over. I can find more stuff I neeed i'm sure to spend the extra money on.

I didnt realize it was an 11.5.

thanks

nathan

 

[surpip]

daYM grab that allison

 

[69K5]

this truck ran head on into an 18 wheeler the allison snapped in 2. the slip joint on the d shaft broke and thats why the rear survived.

 

[sweetk30]

88-up new body is 47" spred on perches center to center pin.

 

[69K5]

sweetk30

thanks for the measurement. I didntr get to go today. I'm still undecided about getting it or the other one.

 

[K5MONSTERCHEV]

Id snatch that axle up, definetly worth more then 170.