Help me ID this diff please.

[big_truxx]

background; 89 scotsdale crew cab dually (chevy) 454tbi 4.10 gears in the D70 rear. I am thinking this is the eaton they were known to come with. please help shed some light on this.

 

[85mudblazin]

pics??

 

[big_truxx]

pics??

i know i am a complete moron since i took pics of the diff when io just changed the oil. working on posting to photobucket now should have up soon lol

 

[big_truxx]

thats a lot better what I had intended to do in the first place

 

[85mudblazin]

Thats not a eaton. Looks to be a D70 like you said. Not real sure what you are asking

 

[jekquistk5]

I think he wants to know if its a LS, locker etc. I have no clue though

 

[85mudblazin]

ow then in that case its open. No clutches or springs that I can see.

 

[big_truxx]

ow then in that case its open. No clutches or springs that I can see.

then explain all 4 rear wheels spinning I have been baffled by this truck.

 

[thatK30guy]

Definitely an open dif.

Go park the truck in a ditch and see if all the tires will spin now. Bet you only one side will spin.

 

[tRustyK5]

Open.

Both sides will spin if the traction they have is equal, so it's not impossible. You should be very familiar with this living where you do. Open diffed cars will do this in the snow quite easily...or gravel.

Rene

 

[big_truxx]

i am very familiar with how an open diff will spin on one side in snow etc but i used to powerbrake this truck at the lights coming home from school years ago to impress my friends behind me seeing all 4 wheels spin. and an open diff should NOT do that

 

[Geargrinder]

Don't know how or why, but my buddy had an '84 DRW 1T Chevy that spunn all 4 rears as well, and it was open diff. We pulled the whole thing apart thinking that there was somthing wrong with it (and there wasn't ) but even after we put it back together it acted like good limited slip/locker all the time To this day we joke about the "air lock" in the dullie

 

[big_truxx]

To this day we joke about the "air lock" in the dullie

so there was a rare air locker option in my truck now i do not feel like i am insane lol

 

[big_truxx]

and also geargrinder awsome avatar