How hard is it to seal the front seal on the transmission

front seal you can do in body
rear seal you have to remove the transmission
get a workshop manual as the procedure is too long for here

transmission has to be removed from the car to replace the front seal, and the driveline has to be removed to replace the real seal, I am assuming the car is rear wheel drive.

I dont know if you are talking about the front seal or the rear seal.The front seal is not to bad you just need the rite tool to take off the harmonic balancer.Now the rear seal you will have to pull the motor or transmission .

CHECK UNDER VECHICLE IF TRANSMISSION FLUID UNDER TRANSMISSION MORE LIKELY PAN GASKET LEAKING FLUID.IF FLUID HAS NOT BEEN CHANGED THE PAN GASKET GET HARD LEAKS FLUID.THATS IF YOU HAVE SLOW LEAK.IF YOU LOSING LOTS OF TRANSMISSION FLUID ITS .LEAKING AT TORQUE CONVERTER SHAFT SEAL.LEAKING AT COOLER LINES.CHECK COOLER LINES FROM RADIATOR TO UNDER CAR WHERE COOLER LINES GOES TO TRANSMISSION. AND CHECK LEAKS AT FRONT DRIVE SHAFT AXLES SEALS

Your first step is to diconnect the battery. Then comes the hard part you must pull the transmission out of the car and put it on a bench or work table (for ease of working). After this you must remove the torque convertor and there is a seal ther and also a seal for the front pump. Ifyou replace both make sure everything is perfectly clean before installing any seals or they will leak again. Transmission fluid is very thin and will find gaps at seals due to dirt very easily. After seals are installed reinstall trans and fill with the proper fluid as per owners manual. Start car and leave it warm up while checking for leaks and recheck the fluid. If everything looks good road test and recheck. If still fine just keep an eye on it and drive away.

it is hard to make a mistake when looking at a front seal leak so your diagnosis is probably correct. As for the repair it is pretty labor intensive as the transmission needs to be completely disconnected from the engine and at the very least slid back 8 inches or so (its easier to change the seal with trans completely removed) to acess the front seal to change it

The two seals should be fairly cheap. the seal itself shouldnt cost more than 5-10 dollars for each one. its a little round ring looking piece of metal with a rubber lining. to fix the front pump seal you'll have to drop the whole transmission and remove the torque converter which (will slide off without complications). the seal will be right behind the torque converter attached to the transmission... it should just pop out and the new one should just pop in. Fro the rear seal all you have to do is take out the drive shaft from the transmission and the seal will be on the end of the transmission.. it should also pop out and the new one should pop right in also. However, if the transmission was drivin with little or no tranny fluid and would not go into gear ..( meaning it would just go into high rpms and not move) your gears are probably shot. If it hasnt been drivin an easier way to tell if this may be the case is to look at the tranny fluid and see how dark it is. if it looks like motor oil instead of transmission oil its probably burnt up... if thats the case it will also smell burnt.

the engine and transmission will have to be removed.

It's leaking front the front pump or converter seal the transmission will have to come out

You have to remove the transmission, remove the torque converter to access the seal. Most likely the bushing behind the seal is worn out allowing fluid to leak past the seal. After the trans. is out, take it to a trans. shop. It requires a special tool to change the bushing. Seems like a bunch of work for $10.00 in parts. The rear main seal requires pulling the pan to access it. When the trans. is out, this is the time to replace the rear main seal on the engine.