tranny & engine stopleak known to work ?

Anyone know for sure of tranny stop leak and engine stop leak that actually reduces leaks at rubber shaft seals ?

Hear's my current dilemas in case any have advice :

Oil dipstick tube is broke at block.Not enough there to grab. Will it lose oil much here if as i have it for now, made tube end smaller to fit 1/8 " in to broken block end of it. upper part now secured to keep slight inward pressure on this so so fit. Return trip to shop that did my starter i was told most oil leakage will be from rear crank bearing oil seal. Any thoughts/suggestions ?

I just had mine in to a shop in december to replace the noisy starter motor before it died, with -30c temps here in winter. The mechanic said he had a HELL of a time making room to do it. It took 4 hrs instead of the shop book quote of 2hrs, which they didn't charge me for. I drove it back in before leaving lot as I noticed a bolt sticking out on passenger side of torque convertor/engine cover where starter is. While under it in hoist with him to snug it up he explained the probs with it. Said he had to remove this cover, the 2 tranny support bars and still had hard time fitting starter in.

Now I have red tranny fluid leaking from that torque bottom cover drain hole, or seems to be from there. It didn't do that before. It only leaks during 1st 5 minutes of warm up in park. Cause if i then drive a few miles and recheck level in idling park, level hasn't dropped too much and no more dripping.

Might my hunch be correct that he somehow damaged the front shaft seal of the tranny ?

Upon asking back at the garage the mechanic manager said he had same S10 4WD BLAZER and that they leak there when old as well as rear main crank oil seal of engine. He said for the cost involved it best to add tranny leak stop and engine leak stop, topping off weekly.

Any opinions ?

Anyone know if any specific tranny and engine leak stoppers actually work on these rubber seals ?

Chilton book says tranny vent may be plugged, if not overfilled. I can't find pictures or see where that is. I tried leaving tranny dipstick loose, up a half inch, to allow venting as test. With this arrangement i have not noticed anymore tranny leak. Anyone know exactly where this tranny vent is ?

Does this make sense to anyone and why ? I didn't think there was any pressure build up in tranny.

I dunno if this a stock tranny. i bought truck used 5 yrs ago. Chilton book shows 4 speed 4L60 or 4L60-E or 700-R4. This one has 4 speeds up to 55-60 mph when it goes to 5th overdrive if no load on it. I've not noticed any electric wires going to it. It's automatic, column shift, has 2 cooling lines running from it to radiator.