the drivers side diff seal (the one that normally leaks onto axle and slings around)
is gm#14271618.
I offered to locate the seals myself. Wow that was tough!Left Output Seal, 1.577 Inch ID, x 2.96 Inch OD, 0.62 Inch Width, Replaces: 40050495, 12471618, 19257296, YMSG1006, 741E076A
First problem is that all the online parts stores either do not give a good description of where the seal fits, or they use terms like Left outer, Right outer, left inner, right inner. The problem was on the Carrier side of the differential to me 'Outer' means outside pointing towards the CV shaft or towards the wheel, and inside should mean on the opposite side (inside) of the carrier housing pointing towards the junction where the carrier interacts with the actuator. Later it appears to be true that Inner means if you look down in the hole there is an 'outside' of the hole seal and then down further is a bearing and then further 'inside' that hole is another seal. So to me the better word would be 'exterior' seal and 'interior' seal. And also therefore the tire facing side and the actuator facing side BOTH would have an 'exterior' and an 'interior' seal.
So that's the part we got put in before at 183K miles so - 80K miles ago - still holding up
So it seemed from most parts stores that the 'interior' or 'inside' seal was the same whether it went on the tire side or the actuator side.. The descriptions are confusing. THey say 'front left inner and front right inner' To me right and left should mean right and left WHEEL side, but in this case it means right side and left side of the actual carrier/diff housing holes and the deep or inside mounted seal..
The differential is on the left side [driver's side] of the oil pan. An intermediate shaft (item #15 in the drawing) goes THROUGH a tube case into the oil pan, and the splined disconnect assembly is on the passenger side of the oil pan.
So above is the actual Driver's side of the front differential - contrary to the previous mention of the "driver's side."
So that's the seal that is leaking on the front differential - the LEFT or DRIVER'S side (not the left side of the oil pan which is the driver's side as the inner seal, accessed via the Passenger side).
So people ask for parts numbers for the above seal - and two WRONG parts numbers are posted!!
The seal is the outer one that is visible. I got mine (for the 2006 Envoy, #82 above) at the dealer for $15.44, P/N 19257296.
If its the outer front drivers side diff seal, the one the halfshaft passes through, the new GM Part# is 19257296.
It superceded GM Part #12471618.
GM Part No.: 12471618 Seal,Front Drive Axle Inner Shaft
the drivers side diff seal (the one that normally leaks onto axle and slings around)
is gm#14271618. this is the one i needed, called drivers side or left hand OUTER
the one that is also the drivers side is the seal that faces the oil pan, gm# 12479302 this is the one that the store will normally try to sell you... called drivers or left hand side INNERSo is 14271618 the "inner" seal or "outer" seal?
Turns out that maybe both are wrong?
indeed the gm# for the drivers side diff seal is 19257296 and goes for about $15.09 at the dealership!
I just went to dealer and bought P/N 19257296 (the seal), and it is the correct one.
The seal has teeth on the back the match up with the bearing directly behind it.OK Let's see those teeth!
Wow - those are serious teeth!
So we want part number 37 - NOT part number 8 of section 57
That Front Differential sure is complicated - what - that's the oil pan also?
hmm I should see the other side of the oil pan up close...
wonder why GM wholesale says it's no longer available...ACDelco GM Original Equipment Front Driver Side CV Axle Half Shaft Seal 19257296
https://www.finditparts.com/products/3013235/american-axle-and-manufacturing-40050495
we get all our seals for these differentials from AAM,(American Axle and Manufacturing). They are the OE supplier to GM but sell the parts aftermarket, also.
That's by far the cheapest and says it's OE supplier - so I should order that one...AMERICAN AXLE & MANUFACTURING part description
40050495 GM 7.25 IFS LH Output Axle Seal AAM
19257296, 12471618, 46002025, 7517
So it's an OUTPUT seal for an INNER shaft and so also the OUTER seal.
but if we get it at the local dealer then there's no shipping cost and saves energy... if it's stocked locally....
alot of people see the anerobic sealer they use seeping and think its a diff leak.... basically they will leak at the case halves, the pinion seal, and the inside axle seal(more common than the outer seal)
there are 3 seals on the diff itself... 2 on the pass side carrier...So who knows? Could be leaking from a number of sources...
the case halves are sealed with an anerobic sealant...
Mopar/Jeep has a real good gray RTV that they use on their differential covers that is excellent at keeping gear oil inside of where it should be. It's almost $10 a tube, but it's the best RTV I have ever used for oil containment. Just clean the seam real good with brake or carb cleaner before laying down the RTV so you have a clean surface for it to adhere to. If mine ever starts leaking at the seam, this is the route I'm taking.Sounds like a plan!!
There's 3 different Mopar RTVs....
ATF-RTV (dark black and smells horrible)
Engine-RTV (Black/greyish)
Gear Lube-RTV (Light grey)
I went to the Chyrsler/Dodge parts counter today and asked for a tube of Mopar RTV.
Mopar Replacement Gray RTV Threebond Sealants 68082860AB
Threebond RTV sealer for use with components that come into contact with engine oil
I’m sure it will workhttps://www.moparpartsgiant.com/parts/mopar-adhesive-rtv-gray~68082860ab.html
A mopar mechanic told me this stuff is super strong, much more so than black rtv so be careful
So far so good. They resealed the case halves
room temperature vulcanizing silicone,https://www.tbssowners.com/threads/diff-leak-has-anyone-actually-fixed-it.89321/
Mine leaked repeatedly after dealer visits, so I i took it out, split the halves, used permatex ultra grey and replaced both output seals.http://www.hylomarsealant.com/
Reseal diff. You need to replace both axles seals which are about $7-15. And you need to take apart the diff case halves. Maybe 7-10 bolts. Keep the diff internals together. Clean the two mating surface thoroughly.PermaTex Spray SEalant vid
Worked until I sold it though - six months later...Says it works on DIFFERENTIALS!! I'm gonna get some tomorrow. Awesome.
Designed specifically to target low pressure leaks in hoses, oil pans, differentials,
So basically I'm spraying the seam of the metal connecting to the gasket...
some does a temporary plug of the front diff - with a gatorade cap.
Here's a vid of the seal being replaced - with the part number shown
19257296
yep it's the same part number.
the cv Axle actually rubs the seal so there fore it causes issues
This bearing hardly ever needs replacing, they are fairly durable.https://www.amazon.com/Permatex-82099-Spray-Sealant-oz/product-reviews/B0018PW15I/ref=cm_cr_arp_d_paging_btm_next_2?ie=UTF8&reviewerType=all_reviews&pageNumber=2
attempt to seal a leaking/cracked rear differential bushing - the kind filled with silicone fluid that was leaking onto my driveway. The dealer quoted bushing replacement at $1200. I cleaned the bushing thoroughly with Xylene to remove surface silicone oil, and applied approximately 15 thin coats. (This product has the consistency/viscosity of water, so multiple coats are needed on a vertical surface). After 3 months - no leaks! The sealant has proven robust - I have driven on rough roads and the outdoor temperature has ranged from 80oF to 0oF.
For best results, clean and de-grease area to be coated (if possible). Don't spray too close...use several light coats...let (almost) dry between coats...let dry completely after final coat.
Here's the catch, each subsequent application of a coat "softens" the previous coat, sort of undoing what you had just done.
Clean the area well with acetone or lacquer thinner, mask it off and apply a few layers of this stuff. Let it cure and the leak is gone.
It actually works. I used it for a rear differential cover leak.
The gear oil ate right thru it.The product goes on as thin as water so any vertical or up-side down applications would be pointless to try this product at all.
.this product will seal a leak in your rear differential or a leak in your front seal of your motor....I had a mechanic use this on a 84 bmw 318 that had 85k miles on it and began to leak oil from the front seal...it was a 800 dollar repair...he used this spray n seal and I put another 100k on the car and never a leak...it was still not leaking when I sold it....
I used brake cleaner and scrubbed the damaged area, jb welded the oil leak areas, then coated the pan with this. ,,excellent... but do it this way,, dont use it alone.
after last spray of brake cleaner, do not use mechanical cleaning, just let it evaporate...cleaner this way)
Then, I unloaded the entire Spray n' Seal can with 1-10 minutes of wait time between sprays. This clear, snot-looking, variable-viscosity goop runs all over the place and sprays out with medium pressure. You will spend more time wiping the excess runoff than actually applying the stuff. I wanted to get 8-10 coats on my timing chain cover seam, and the front of my oil pan gasket. I managed to do that just as my can of Spray n' Seal ran dry.
elastic polymers (typically latex) mixed in a solvent such as acetone, hexane, heptane or toluene to keep the fluid .diff covers, etc. it's the only sealant I use anymore.
https://grassrootsmotorsports.com/forum/grm/need-to-know-everything-about-right-stuff-sealant/85594/page1/
This elastomeric “formed-in-place” material is more reliable and longer lasting than pre-cut gaskets. It is blowout resistant and protects against leaks and seepage caused by vibration and thermal expansion. Formulated to meet or exceed performance standards for long-term salability, durability and handling, this material is used on OEM production lines and specified in their service parts programs. Temperature range -75°F to 450°F (-59°C to 232°C) continuous, 500°F (260°C) intermittent; resists ATF, coolant, oil and other shop fluids.
It can be used but i do not recomend using any sealant on o-ring fittings. Get the proper o-ring
bridged a 3/8 gap on aftermarket intake end seals. Absolutely no leaks. This is now my go-to intake sealant.
Best glue for oil pans and rear differential covers we have found. Never leaks when properly cleaned and applied.
Saved me with a tough spot to seal with allot of pressure
Works great! Easier and cleaner to work with than silicone gasket products. I used this on a rear differential cover, so far not a seep or drip.
it seems to have done a great job at sealing up the rear main seal and oil pan.
This stuff sticks once it's cured and may cause slight warping when removing sheet metal valve covers
Best sealant ever for automotive work that involves heavy fluids like differential gear oils
it is more like a thick & highly sticky glue. It does not spread easily or evenly. It is frankly a gloppy mess and the tooling/initial curing time is way too short for application and subsequent parts assembly in my opinion.
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