Rear main seal leak on 1996 Tahoe 5.7

[Atrain1]

My wife has a 1996 Chevy Tahoe and when I got up for work this morning I noticed the rear main leaking. Does anyone know of a good additive I can add? I do not want to take out the Engine or drop the pan to try and fix it. Thanks for your input.

[Big Wall]

I don't know of an additive, but if you are using synthetic oil it can make a car leak oil because it is so much more "slipery" than regular oil.

[Atrain1]

I don't know of an additive, but if you are using synthetic oil it can make a car leak oil because it is so much more "slipery" than regular oil.

I have never used synthetic oil do to it being thinner thin conv oil. I dont even use it in my race Engines. I had a 1978 Grand Prix that would sling oil out of the timing cover all over the passenger side of the engine compartment, I used an additive and it stopped that very large leak. Now the the problem is I can not remember what I used.

[SouthPaw]

A rear main seal leak can really only be "slowed down." The only thing I have heard that actually works and some people swear by it is called "White Shepard." Advance Auto Parts on 10th street carries it and I think its around $50.

[Atrain1]

A rear main seal leak can really only be "slowed down." The only thing I have heard that actually works and some people swear by it is called "White Shepard." Advance on 10th street carries it and I think its around $50.

If I could slow it down it would help just until I get healed enough to fix it the right way.

[SouthPaw]

try the white shepard

[BPTactical]

Pull the tranny, pull the flywheel, pull the seal retainer, replace seal.
Assembly is the reverse of the aforementioned.

Anything else is a waste of time and money.

[Atrain1]

try the white shepherd

I found it online for 12.95 and I want to say I used bars leak the last time. I am not used to using stop leak to fix leaks, I like to do it the right way. I have had some recent accidents so it will be a bit until I can work on a car. Have you ever used Bars leak and if so how does it fair up to the White shep
herd?

[mcantar18c]

Please, don't use any stupid additives like "Stop Leak" (edit: Bars Leak, White Shepherd, etc. fall under the "stupid chit" category as well). It'll do more harm than good.
Do it the RIGHT way and replace the seal that's leaking. And before you write it off as your RMS, check everything to make sure it isn't something simpler like the oil pan gasket.

[Atrain1]

Pull the tranny, pull the flywheel, pull the seal retainer, replace seal.
Assembly is the reverse of the aforementioned.

Anything else is a waste of time and money.

I will pull the engine before I do that just because I had my own business rebuilding the 700R4 200R4 4L60E and 4L80E transmissions. I used to do alot of those trucks and I hate laying on the ground and pulling the trans, and I am not in the physical condition to do it or I probably would go that rout one more time. I have it down to a science it only takes me a couple of hours to take it out and a couple hours to put it back in.