Tahoe 2007 LTZ 2WD 5.3 Transmission drips between the transmission housing and the engine block. Which seals do I need

[Geotrash]

I spoke to the people at the German representation at Sonnax. I have a 4L60 transmission in my Tahoe! Therefore, the data from the parts above does not quite fit. We could find out now over my VIN Number. A question for you. The Service man was recommended to overhaul this gearbox with performance parts at my mileage of 208780ml would makes sense. Does that really make sense now? Because it would cost me €2900. A lot of money, but a titanium converter comes in, and the components are designed for high performance. What do you think about it?

Over the Vin Code : (M30) Transmission,AT 4-Х SPEED,4L60E,

Oops. Forgot yours is a 4-speed - sorry. 209K is a long time on one of those - I had one in my '02 Suburban that went out at 130K. Since it's a fair amount of work to remove the transmission in the first place, doing an overhaul is a good investment if you plan to keep the truck for a while yet.

 

[me88]

Leaking rear main seal is a classic on GM V8's, but I've had good success with Liqui Moly Öl-Verlust Stop in the engine.

The small bottle (330 ml) is suitable for up to 5 liters of engine oil, but the 5.3 takes ~5.7 liters (6 quarts) of oil. In that case they told me to replace up to 10% of the oil volume with the additive, so I got the 1000 ml bottle and added half of it together with ~5.2 liters of engine oil. It starts working after 800 km, after which you can clean the undercarriage and see if it stays clean afterwards. I used to smell a little bit of hot oil occasionally, but not anymore with the additive in it. For future oil changes adding the small bottle should be enough.

Mine is nowhere near 200k miles though.