Thought I had Dana 44 ? Help

[mavtricks71]

Ok so looking at my Front differential cover on my 86 k10 ....I thought it was Dana 44 but the diff covers are shaped different on aftermarket ones I wanna buy....what front diff is in my truck? Here's pic

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[1987 GMC Jimmy]

Looks like an 8.5” GM Corporate 10 Bolt to me.

 

[77 K20]

Yes, GM10 bolt. The D44 started getting phased out in the late 70's. I think by '80 they were all GM10 bolts.

D44:

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[PrairieDrifter]

Yep as posted above the Dana 44 covers ALWAYS look like that. So you have a 10 bolt not a Dana 44

 

[mavtricks71]

Ok thanks so much... the front 8.5 inch GM differential, are there any issues with these differentials ? I know people swap them out with other diffs.

 

[Jrgunn5150]

Ok thanks so much... the front 8.5 inch GM differential, are there any issues with these differentials ? I know people swap them out with other diffs.

It's pretty on par with a D44 really.

 

[theblindchicken]

Isn't the GM 10bolt pretty much like an updated version of the D44, but without really any strength or service life improvements?

 

[Jrgunn5150]

Isn't the GM 10bolt pretty much like an updated version of the D44, but without really any strength or service life improvements?

American Axle pretty much copied it.

 

[77 K20]

They are both pretty much the same. Only reason people swap out either of them would be for a D60 for severe use off road.