Dtret Posted March 1 Posted March 1 Looking for a factory steel 70 12 bolt cover. No notch. Mine is a little too pitted for me to use. Thanks Dennis. 1 Quote
Scott S. Posted March 3 Posted March 3 Sometimes you feel like a dent..... Sometimes you don't. If I remember right, the "dented" one is for type 4 carrier/ring gears, anything over 3.73:1 ratios. 2 Quote
DragCat Posted March 3 Posted March 3 3 hours ago, Scott S. said: Sometimes you feel like a dent..... Sometimes you don't. If I remember right, the "dented" one is for type 4 carrier/ring gears, anything over 3.73:1 ratios. Is it only for type 4 carrier or also and or 3.73 or above ratio's ? Just my curiosity Quote
Dtret Posted March 4 Author Posted March 4 Not the one for the ring gear. The one at the 11:00 position 3 Quote
Dtret Posted March 4 Author Posted March 4 3 hours ago, DragCat said: Is it only for type 4 carrier or also and or 3.73 or above ratio's ? Just my curiosity I believe they are all the same but not a 100 percent. 2 Quote
72 Monte Carlo Posted March 4 Posted March 4 I'll look at my stock 12 bolt cover. I want an aftermarket 12 bolt cover for mine, since it's going from 2.73 ratio to 3.31 and a brand-new Yukon posi. 1 Quote
Scott S. Posted March 4 Posted March 4 This is the cover I have on my 12 bolt differential with 3.31:1 gear ratio. Quote
Scott S. Posted March 4 Posted March 4 1 minute ago, Scott S. said: This is the cover I have on my 12 bolt differential with 3.31:1 gear ratio. The notch is there for the brake line clip. Quote
Scott S. Posted March 4 Posted March 4 22 hours ago, DragCat said: Is it only for type 4 carrier or also and or 3.73 or above ratio's ? Just my curiosity Type 1 is for 2.56:1 ratio and smaller Type 2 is for 2.73:1 to 3.08:1 ratio Type 3 is for 3.23:1 to 3.73: ratio Type 4 is for 4.10:1 ratio and larger Or so I've read..... I believe the "dented" cover is only needed for the type 4 gear set, but imagine some could have made it on to other differentials, depending on what was in stock on the assembly line at the time of assembly. I'm sure someone here probably knows for sure. Quote
Scott S. Posted March 4 Posted March 4 17 hours ago, 72 Monte Carlo said: I'll look at my stock 12 bolt cover. I want an aftermarket 12 bolt cover for mine, since it's going from 2.73 ratio to 3.31 and a brand-new Yukon posi. I've heard that aluminum covers are a better choice..... Finned as well. Quote
DragCat Posted March 4 Posted March 4 49 minutes ago, Scott S. said: Type 1 is for 2.56:1 ratio and smaller Type 2 is for 2.73:1 to 3.08:1 ratio Type 3 is for 3.23:1 to 3.73: ratio Type 4 is for 4.10:1 ratio and larger Or so I've read..... I believe the "dented" cover is only needed for the type 4 gear set, but imagine some could have made it on to other differentials, depending on what was in stock on the assembly line at the time of assembly. I'm sure someone here probably knows for sure. Thanks, we removed my type 2 and my buddy had a type 3 and 3.55 gears "In Stock" He wouldn't let me touch his Type 4 🤣 I doubt I'll ever change but good to know 2 Quote
Dtret Posted March 5 Author Posted March 5 4 hours ago, Scott S. said: The notch is there for the brake line clip. But you notice there is no notch on your cover. The brake line clip wraps around the lip on the cover. 1 Quote
Scott S. Posted March 5 Posted March 5 19 hours ago, Dtret said: But you notice there is no notch on your cover. The brake line clip wraps around the lip on the cover. O.K.... Now I've got my glasses on. I see what you're seeing. Just to clarify, my 12 bolt is from a '72 El Camino which also had the "shock protection plates". I can't see any other reason for the notch. It wouldn't be for clearance on the suspension bars, there's lots of space there. Funny though, only SS396 seems to stock the one with the notch....... Could be a "Chevelle" thing ???? Quote
Dtret Posted March 6 Author Posted March 6 4 hours ago, Scott S. said: O.K.... Now I've got my glasses on. I see what you're seeing. Just to clarify, my 12 bolt is from a '72 El Camino which also had the "shock protection plates". I can't see any other reason for the notch. It wouldn't be for clearance on the suspension bars, there's lots of space there. Funny though, only SS396 seems to stock the one with the notch....... Could be a "Chevelle" thing ???? No more of an early thing. Gm revised the clip and added the notch. 2 Quote
Scott S. Posted March 6 Posted March 6 17 hours ago, Dtret said: No more of an early thing. Gm revised the clip and added the notch. Ahhh, so anyone with the notch is probably a "reproduction". Quote
Dtret Posted March 6 Author Posted March 6 1 hour ago, Scott S. said: Ahhh, so anyone with the notch is probably a "reproduction". No. Gm redesigned them. And they actually would be mixed and matched in cars that didn’t use the notch but the ones that needed it got it. 4 Quote
Dtret Posted March 16 Author Posted March 16 The yellow one is what Bob sent me , after blasting and painted sitting next to the one I took off. 4 Quote
willie Posted March 16 Posted March 16 Hey Dennis nice job, that blaster works great!!!! Tkx Bob!!! 2 Quote
cny first gen 71 Posted March 17 Posted March 17 21 minutes ago, Scott S. said: And those shoes sneak into te photo again..... That way we know it's Dennis not an imposter 😅 1 2 Quote
Dtret Posted March 17 Author Posted March 17 2 hours ago, cny first gen 71 said: That way we know it's Dennis not an imposter 😅 The crap I have to deal with. lol. 😝 1 5 Quote
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