Jump to content

Recommended Posts

Posted
3 hours ago, s10dragracer888 said:

D39DB734-1E5F-4295-8D4A-675C76553151.thumb.jpeg.b30dd82aa286dab0db95676a8e410bf1.jpeg

 

What diff cover is that?

  • Like 1
Posted (edited)
9 hours ago, GETGONE said:

 

What diff cover is that?

Hey GETGONE, that is the Proform Bowtie diff cover in black crinkle finish. You can get them from Jegs, summit, or Amazon for around $180. This was the one that supposed to fit the 8.5 or 8.6 inch GM differential. They also make them for 7.5 inch and some others, too. I figured I’d give it a shot, and since LUBELOCKER made the reusable gasket for the 8.5” ‘corporate’ 10 bolt, I made a lucky guess that they would fit. Sure enough. Both went on without a hitch. I guess GM 8.5/8.6 and AAM 8.6 use the same carrier, just different internals. It doesn’t leak. I used Teflon tape on all the threads, even the bearing load bolts.

 

You’ll find that the bracket on top of the diff needs slight modification when you install, the bolt holes don’t quite line up for the two on top due to the new aluminum cover being slightly thicker (3/8”). No problem, couple of cable ties will hold it until I take it back off and elongate the holes about 1/8”. The photo is upside down (thanks, iPhone), but you can see a hint of the cable ties on the bracket where the welded nut is on the bottom.

 

image.thumb.jpg.d8d5b14e45ae603e7af0d34f5a412426.jpg

 

you’ll need to grind out the inner corners of the bracket that goes on the cover where the ribs of the cover contact it, so the bracket goes on flat. I just took mine to a bench grinder after marking it. After getting it right (no, it’s not that easy and I was up and down several times getting it just right), I was able to follow the bolt pattern on the Lubelocker box (for torque sequence), tightened them all down to 20 ft.-lbs. (bearing load bolts to a max of 10, jam nuts also 10), and installed the drain plug with Teflon tape. Filled with 2 quarts of LucasOil synthetic 75w-90, and put the fill plug in. She’s been a happy camper since. 
 

also, they come in a couple different finish options, too. I got the one that stood out the most to me. I believe you can get natural finish, and matte silver, too (not chrome). Additionally, they send two sets of stainless bolts to use. One is metric (what I used) and one is standard. Both take a 13mm or 1/2” socket.

Edited by s10dragracer888
Posted

I didn't originally look at the bolt count. You have the 4.3 and it has a 10 bolt instead of the AAM 9.5/9.6" 12 bolt that I have with my 6.2. The only cover I've found is the AFE, which I bought a used one that had been painted a metallic pink LOL. I stripped it and am going to paint it red.

  • Like 1
Posted
19 hours ago, GETGONE said:

I didn't originally look at the bolt count. You have the 4.3 and it has a 10 bolt instead of the AAM 9.5/9.6" 12 bolt that I have with my 6.2. The only cover I've found is the AFE, which I bought a used one that had been painted a metallic pink LOL. I stripped it and am going to paint it red.

 

19 hours ago, GETGONE said:

I didn't originally look at the bolt count. You have the 4.3 and it has a 10 bolt instead of the AAM 9.5/9.6" 12 bolt that I have with my 6.2. The only cover I've found is the AFE, which I bought a used one that had been painted a metallic pink LOL. I stripped it and am going to paint it red.

Believe it or not, I think the AFE and the Proform are molded similar on the inside, and that’s what counts. Attached is the link to the one I got.

 

Proform 141-696 End Cover https://a.co/d/6OV4NfV

 

the reviews confirmed what I was saying about the Teflon on the bearing cap support bolts.

 

Don’t Teflon the cover bolts. Lol. I have seen it done and it’s not pretty.

 

I think LubeLocker makes a gasket for the AAM/GM 9.5 and 9.75. I could be wrong, but it doesn’t hurt to find out. It is multi-layer, steel core, and reusable.

 

hot pink? I have a guy friend that just might want to buy that as is. He drives a Ford! 😂

Posted
19 hours ago, GETGONE said:

I didn't originally look at the bolt count. You have the 4.3 and it has a 10 bolt instead of the AAM 9.5/9.6" 12 bolt that I have with my 6.2. The only cover I've found is the AFE, which I bought a used one that had been painted a metallic pink LOL. I stripped it and am going to paint it red.

I thought the 6.2 was supposed to come with the 10-speed and the 9.75” rear differential?

 

I modified my front cover as well. It’s on the mods page, I made my own post. Here’s what I found out about those front ones.

 

It’s hit or miss with the other trims, but all trail boss and AT4 models come with the AAM 8.25” front differential. SU5.

 

I’m fairly certain the custom, work truck and some “lesser optioned” LTs come with the SU4 front axle. I’m thinking it’s an 8”…. The high country and some LTs might come with the SU5. Im not sure but I’m also thinking the 6.2 always gets the bigger front diff. SU5.


You can modify both SU4 and SU5 front covers like I did mine. I did it solely so I can drain and fill in a fraction of the time it takes to remove the stupid cover. Yes, I said it like that because I became extremely angry trying to get the front cover off. Top 4 or 5 bolts are next to impossible without the right tools. Air ratchet didn’t even reach. 🙄🙄🙄

Posted
7 hours ago, s10dragracer888 said:

I thought the 6.2 was supposed to come with the 10-speed and the 9.75” rear differential?

 

Well the cover is listed as 9.5/9.76 for the AAM 12 bolt. I stated the wrong measurement in my last post off the top of my head. For the price I bought it for I was able to purchase the site glass and deep magnetic fill plug and still be less than the street series cover new.

 

https://afepower.com/afe-power-46-71120a-street-series-differential-cover-raw-w-machined-fins

 

  • Like 1
Posted
1 hour ago, GETGONE said:

 

Well the cover is listed as 9.5/9.76 for the AAM 12 bolt. I stated the wrong measurement in my last post off the top of my head. For the price I bought it for I was able to purchase the site glass and deep magnetic fill plug and still be less than the street series cover new.

 

https://afepower.com/afe-power-46-71120a-street-series-differential-cover-raw-w-machined-fins

 


I see what you mean. Seems as though y’all have the same issue with the AAM/GM differences that I had with the front. Hard to tell what comes from where.

Posted

I’m confused about the rear diff cover.  I have a 2020 Silverado 1500 5.3 with 4 wheel drive and I recently purchased a B&M Aluminum rear diff cover (9.50/9.76) part number 137877 and it would not fit. So I called B&M tech support and I was told that I have an RPO SU8 and NOT an RPO SU7 and they (B&M) does not make the RPO SU8.   The B&M cover I purchased was visibly different than what my truck has.  Does this make any sense to anyone?

Posted
1 hour ago, Tdola said:

I’m confused about the rear diff cover.  I have a 2020 Silverado 1500 5.3 with 4 wheel drive and I recently purchased a B&M Aluminum rear diff cover (9.50/9.76) part number 137877 and it would not fit. So I called B&M tech support and I was told that I have an RPO SU8 and NOT an RPO SU7 and they (B&M) does not make the RPO SU8.   The B&M cover I purchased was visibly different than what my truck has.  Does this make any sense to anyone?

 Look at the pictures and the AFE web link I provided. They have a side by side picture comparison of the two different RPO covers.

Posted

Anyone know what the maximum tire size/offset combo is that would fit a 2021 Sierra (Denali - not sure if that matters), or know if there are guides on how to measure this online? Sorry - I've looked through lots of these pages but not sure this specific thing was asked anywhere in the thread

Posted

275/60/R20 Cooper Discoverer Rugged Trek

Bilstein 5100 all-around. 2" front setting. 1" block in rear.

XF Offroad XF222

 

Been on this setup for 2 years. 

 

 

 

 

image.thumb.png.7b37462b150642f9b1063d58a4ff52c4.png

 

image.thumb.png.747d41ad662d565044bbf770c8a902b9.png

Posted

Damn...how many lights do you need on that thing?

  • Like 1
Posted
Just now, GETGONE said:

Damn...how many lights do you need on that thing?

You can NEVER have enough lights…Lol

  • Haha 1
Posted (edited)
1 hour ago, GETGONE said:

Damn...how many lights do you need on that thing?

All of them! The interior is decked out too :D

 

Edited by jashaw
Posted

Anyone running a 295/70 on a 17x8.5 0 offset wheel (Method) on stock suspension? Looks like it would fit, but any comments would be welcomed. 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts
  • Member Statistics

    342,894
    Total Members
    8,960
    Most Online
    TopBo
    Newest Member
    TopBo
    Joined
  • Who's Online   0 Members, 0 Anonymous, 1,234 Guests (See full list)

    • There are no registered users currently online

  • Latest Articles

  • Posts

    • not all plugs will be used.  gm uses more generic harnesses that support most/all options, and if your truck doesn't have a specfiic option, the plug won't be used (commonly will have a dummy insert in the plug , or it'll be taped up, but some may just be left as is).  But it's sldo possible some p.o. has installed the wrong/cheaper parts that aren't correct for your vehicle...
    • First off, I'm not trying to just get easy advice/fixes for the issues I've noticed so far.  I'll be combing through the site via searches and such, and if past experiences are any indication, should find what I need.  For the sake of conversation, though, I figured I'd post the handful of things I've noticed in the 12 hours since buying my 2010 SLE CCSB.     Indicator lights: Airbag and TPMS.  The tire pressures aren't reading for any of the wheels, so I'm pretty certain the sensors were either removed, are damaged, or are otherwise inoperable.  I used to mount and balance tires 25 years ago but am pretty much ignorant when it comes to TPMS.  My 2006 didn't have the sensors and this might be the fourth vehicle I've owned that does.     Radio: Rear speakers aren't working.  I removed the driver's side rear door panel and checked the speaker and wiring.  I also removed the sill and b-pillar covers to check the wiring.  A few minutes of Google Fu showed that this is potentially a head unit issue.    Switches: Power mirrors don't turn left/right.  I ordered replacement driver's door switches that should arrive tomorrow.  The windows and locks work but it was only about $20 for all of them.  The driver's side rear window switch lets the window down but won't put it back up.  I think the passenger rear doesn't work at all.  In the coming days/weeks, I'll break out my multimeter to check all of that.   Unknown wiring harness: There's a box attached to the front driver's side of the engine compartment, right where the second battery shelf is located.  There are three plugs, one of which looks like it fits a standard headlight-style bulb (9007 or similar).  It doesn't look like it's plugged into anything.  I'll do some digging and if I don't see anything elsewhere on the site, post some pictures here.   Unknown plugs on brake booster: There are at least two female plugs on the brake booster that aren't being used.  I think it might be a replacement/aftermarket, so maybe those are used for a different application, as there don't seem to be any unplugged harnesses and no indicator lights are on.   Little squeaks when turning: Sounds almost like a bushing around the bed of the truck.  I'll have to pay close attention as I get more familiar with the truck.   Clunk on acceleration: possibly the infamous drivetrain clunk.  My 2006 had it and I'm just not familiar enough with this truck yet to fully grasp what it is.   Anyway, my apologies for the vague and all over the place post.  This truck is new to me, and it's been four years since I drove my 2006.  With 200k miles, I know I'll need to learn this truck quickly to avoid having any major issues, despite being confident it's got much more life to it.  My 2006 had nearly 320k on it when I parked it (nearly 300k of which I put on the truck), and it was still drivable then, though I suspected the head gasket might have blown.  I'd hoped to have that truck back by now, but it's gone forever, as I detailed in my reintroduction thread.  
    • I always drive in Sport mode. With more driving, I am finding the initial response when accelerating is much quicker now🖕 Lou
    • Is it an optical illusion in the pic or is the truck really squatting that much horribly?
    • My initial introduction was here.  It's hard to believe that I last posted in February 2013, having just deployed to Kyrgyzstan.  Since then, I've retired from the military and the 2006 Sierra SLT Z71 that first brought me to these pages was lost.  I went forward to Afghanistan in March 2013 and did a lot of sitting behind a computer on brigade staff.  Within 18 months of getting back to the States, I was selected for Drill Sergeant duty, after which I moved back to Virginia (my home state and where I served from 2004-2008).  That '06 Sierra did a lot of driving between Louisiana, Georgia, and Virginia, and ended up with nearly 320k miles by 2022.  By then, the registration had been expired for a couple of years, but the pandemic had all but eliminated tickets for such transgressions.  Admittedly too, I usually drove my wife's SUV or son's car the 2-3 times a week I had to report to work.  Teleworking sure was fun while it lasted.   I started my retirement leave four years ago and stored the Sierra at my sister's house.  A big mess was made when her fiancé passed while she was taking care of business out-of-state in late-2024, and his son pretty much mismanaged everything to do with the estate.  Even so, I was assured that my truck was safe... until it wasn't.  I found out that my truck had been scrapped about four months after the son took over everything.  There's nothing I could do; I'm 1000 miles away and it was technically abandoned property since he'd even trespassed my sister from her own house (she had no claim to it as she wasn't married, and the fiancé was the sole owner).     Anyway, today I got my second Sierra.  This is a 2010 SLE 2WB CCSB with a little over 200k miles on it.  It's got the 5.3L I'm familiar with and should handle what I need it for.  Hauling stuff that won't fit in the Transit Connect (yep, I sold out, but that's the wife's vehicle) and towing a few times a year tops.  The price seemed decent, considering how much people sell their trucks for in the Deep South: $4500.  I've seen similar trucks listed for more than double that.  I got it from a coworker who left his tag on until we transfer the title next week (Louisiana requires a notary for transfers), so I've been driving it all day.  The rear speakers don't work, which is one of the things that brought me back to these forums earlier.  I can't say how active I'll be as a poster, but I'll be scouring the archives while I find out every little thing I can about the 2010s and particular nuances/problems with my truck.   It's definitely not a GMC, but I got another Willys Jeep a few months back as well, so I'm almost at the same place I was when I first joined gm-trucks.com.  My old 1960 DJ3A was sold back around 2010 or 2011; my current Jeep is a 1946 CJ2A.  So, I've got a slightly newer GMC and a much older Jeep.  I kind of wish I still had that F-250 I had way back when too.  The Dakota is long gone and was technically my brother's truck, though I had it registered and insured.  The F-250 had to go when my grandmother's house was foreclosed on due to mismanagement around 2012 or so.     Hopefully anyone that made it this far isn't too annoyed.  I tend to be long-winded, but I'll be doing more reading than posting in the coming months.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...