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08-10-2011, 10:46 PM | #1 |
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Location: Hallettsville, Texas
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what kind of rear end do i have?
i dont know much about them i went out today cleaned it off got some numbers and this is what i got drivers side of front of differential 3896839 and passenger side of rear differential gm75 and on top of the passenger long tube there where three letters kdu its a 12 bolt rear end on a 77 chevy long wheel base i believe its stock but im not to sure if any more information is needed let me know ill go back out tmoro and see what else i can dig up
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08-11-2011, 12:44 AM | #2 |
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Location: Lewis County, WA
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Re: what kind of rear end do i have?
It is a 12 bolt.
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08-11-2011, 12:50 AM | #3 |
60-66 Nut
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Re: what kind of rear end do i have?
What info are you looking for other than it is a 12 bolt? If you are wanting to know gear ratio and weather it is a posi or not, I would just pull the rear cover and have a look. More than likely the gear oil could stand to be changed. The differentials are possibly the most neglected when it comes to maintainence.
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08-11-2011, 01:50 AM | #4 | |
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Re: what kind of rear end do i have?
Quote:
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08-11-2011, 01:26 PM | #5 |
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Re: what kind of rear end do i have?
im afraid of what im going to find and what do i do when i pull the cover? how do i find out what gearing there is? and how will i properly seal it back up?
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08-11-2011, 01:28 PM | #6 |
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Re: what kind of rear end do i have?
and the reason for it being the most neglected is because nobody really knows much about them
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08-11-2011, 02:22 PM | #7 |
is a fungineer
Join Date: Jan 2009
Location: Bakersfield, CA
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Re: what kind of rear end do i have?
The ring gear will have some numbers stamped on it, two of those numbers will tell you what ratio you have (the numbers how many teeth the ring gear and pinion gear have). You will have to divide the big number by the little number. For example, my truck has 41 11 on the ring gear, which 41/11 = 3.73 ratio.
I use silicone on my rear end covers, I don't use a gasket. Some people may disagree on the right or best way to do it.
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08-11-2011, 03:48 PM | #8 | |||||
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Re: what kind of rear end do i have?
"what kind of rear end do i have?"
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LMFAO.....I didn't realize it could be so much fun to only slightly "quote" someone in the reply. Imagine if someone outside the board read this??? Man.....I'm in a weird mood today!!! |
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08-11-2011, 07:56 PM | #9 | |
just can't cover up my redneck
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Re: what kind of rear end do i have?
OK, back in your cage.....who let you out anyway?
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Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. |
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08-11-2011, 09:10 PM | #10 |
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Re: what kind of rear end do i have?
"I don't care who you are.......that's funny right there!"
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08-11-2011, 10:57 PM | #11 |
Has more rust than truck...
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Re: what kind of rear end do i have?
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08-12-2011, 12:18 AM | #12 |
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Re: what kind of rear end do i have?
please dont turn my thread into a joke im a very commited 16 year old trying to learn everything possible this is my daily driver to work and all around its all i got and im taking all neccisary precautions in working on it and figuring everything i can about it i want to learn and not be critized about it so please if you could stop thank you
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08-12-2011, 01:42 AM | #13 | |
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Re: what kind of rear end do i have?
Quote:
Man.....wasn't trying to critize you and I'm not sure how you took it that way. Not sure why that struck me as so funny when I was reading all the replies after reading the thread title. I was just in a goofy mood. We are just a bunch of guys and a few gals hanging out helping each other and having fun along the way. It's going to happen from time to time. It's awesome that you are only 16 and getting into all this. This board is a wealth of information for you to tap into. Just try and have a little fun along the way. My apologies if I disrupted the flow of the thread. |
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08-12-2011, 01:50 AM | #14 |
~Rest In Peace~
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Re: what kind of rear end do i have?
i thought it was going to be one of those the wife ask Question
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08-12-2011, 11:00 AM | #15 |
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Re: what kind of rear end do i have?
pull the cover... can't hurt,, but before you do.. on the pass side of the rear center case there is a plug (fill plug) it's between the 2 webs, make sure you can get this out before you pull the cover.. (i used a rathet witha 3" extention where you'd normally put a socket on the extention goes in the plug to turn it.. get it to turn then move on..
before you do, go to parts store and get a 12 bolt gasket(some don't use a gasket and use just rtv) I've had the best luck with a gasket and a light coat of rtv on both sides.. and get gear oil..(2 quarts/two bottles) and because you didn't know yet if it's a posi. get the gear oil thats got the posi additive in it..(it'll say it on the bottle) pull the cover, write down the numbers, and take a pic of the diff. if the center has springs and plates, it's a posi.. if not it's an open.. I spray brake clean in there to get all the junk off the floor of the case, then use rags.. clean the face of the rear end where the cover bolts to.. the old gasket will be a p.i.t.a. to remove it all. you must get it all off.. same with the cover, take your time.. look at the cover, at the bolt holes if the hole isn't flat, light taps of a hammer to flatt'n it.. (if the covers never been off, this is not needed 98% of the time).. reseal the cover (your choice rtv by itself or a gasket) snug up the bolts, then in a chris cross pattern tight'n them.. forget the torque spec. (someone will chime in) I've been doing this for years and use "feel" for when enough just don't crank them down.. now fill it.. I find a piece of rubber hose works great to get the oil into the rear.. I use an old piece of plumping as I had 1/2 copper around with an elbow.. but for most the rubber hose is all you need, most don't do it as much as me either.. while under there, check the vent hose,, check for leaks, and your done,, recheck for leaks in a few days, then in a week. retorque bolts as needed.. |
08-12-2011, 11:11 AM | #16 |
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Re: what kind of rear end do i have?
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08-12-2011, 11:12 AM | #17 |
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Re: what kind of rear end do i have?
here is the fill plug local
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08-12-2011, 11:18 AM | #18 |
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Re: what kind of rear end do i have?
now would be a great time to get a note book (back to school sales) 5 subject is best(engine/chassis/body/elictrical/drivetrain)
and write down the info as you go.. like here, the gear part # and ratio, posi or not, date and miles of new gasket, and lube,, lube used, this will be a big help down the line and if you ever sell it. a big plus.. |
08-12-2011, 02:40 PM | #19 |
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Re: what kind of rear end do i have?
THere we go.....back on track. Thanks Stich!
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08-12-2011, 11:41 PM | #20 |
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Re: what kind of rear end do i have?
thank you for filling me in on all of the info very much appreciated when i get some time in my hesty schedual (and yes im a very busy 16 year old got lots on the to do list) ill get to it right away and sorry for misunderstanding your playing around just been really kind of stressed lately seeing things differently than opossed thank you guys
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08-12-2011, 11:52 PM | #21 |
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Re: what kind of rear end do i have?
We cool!
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08-13-2011, 01:17 PM | #22 | ||
"I ain't nobody, dork."
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Location: Whidbey Island, Washington
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Re: what kind of rear end do i have?
A little ribbin' is good now and again. Makes ya laugh... and a little laughter is good for ya!
Keep pluggin' away... I will offer this though. A lot of questions that get asked are usually pretty common knowledge. Stuff that is usually available in a good repair/service manual, or with a simple Google search. I do understand that not every person has the same knowledge base. I've been wrenchin' on cars and trucks for 30+ years. I learn new stuff all the time. I've learned a lot more about engines and transmissions here in the last few years than I thought I already knew. Good group of guys here. But ya gotta watch that kid from Holleyville Oregon... he's a character. He'll grow on ya though. Gary Gary
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08-13-2011, 01:26 PM | #23 |
My Carbon Footprint
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Re: what kind of rear end do i have?
Glad to know that 43 is considered a kid. You outta see me drive on the back roads. You'd swear I'm 19 again!
FYI.....Gary is the only guy in Washington that actually knows how to drive! |
08-13-2011, 01:30 PM | #24 | ||
"I ain't nobody, dork."
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Re: what kind of rear end do i have?
HAHA! I'm a 43 year old kid too!
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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08-13-2011, 01:42 PM | #25 |
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Re: what kind of rear end do i have?
I think this whole thread was informatively entertaining!
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