I just looked at a 89 Chevy 1 ton 4x4 with a 454, turbo 400 and i forgot to look and see what axle was in the rear, does anyone have any ideas the owner didn't know when i called to ask him?

14 bolt Full floater

I know it wasnt a 14 bolt cause i had the guy count the bolts and he said there were only 10 bolts on the cover, I was hoping he was going to tell me 14 but he didn't.

If it was dually, it was a Dana 70. Not sure the bolt count, seems like it is 10 bolts...

Most likely a duallie with a Dana 70 rear as Baddog said.

its a single wheel not a duallie, and it looks like its bigger than a 10 bolt I was thinking it might be a dana version of something but I don't recall chevy putting dana in the rear

dana 70's have 10 diff cover bolts..

u said this is an '89 truck..

i know '77-'87 1 ton 4x4 single rear wheel trucks had front 60's w/ kingpins and 14 bolt FF rears..

'89 i don't know what they did.. isn't it ifs front?? that year they may have used a dana 70 for single wheel rears..

89 K30 had IFS front, 89 V30 had a D60 front. Both were 1 tons and both had C14FF rears for SRW. All SRWs in that range had C14FF. Cab and Chassis dual wheel trucks had narrow C14FF. Wide duallys had D70s. Anything else has been swapped in. 10 bolts could be a C10, D44, D60, or D70 IIRC. Doubt you would find a C10 or D44 in the back of a 1 ton anything. Maybe someone swapped a D60? Is it full float? Your gonna have to give more info for any more help…