82 s10 that Im putting a 350 in what type of transmission and rear end are best to put in?
If you are using an automatic, the TH 350 with a shift kit is a wonderful and stout choice. The rear end is a bit more wide open. If you are looking for a posi rear end the GM 12 bolt can be made to fit, or the Ford 9 inch is a favorite. If the S-10 had a v6 you might be able to leave the stock rear end in until it burns out. You might also look for a rear end from a newer S10 that has a 4.3 engine, as they should handle things alright without having to have the rear end modified to fit the truck.
It really depends on your truck and the type of gearbox you have. Your best bet is to call a dealer and ask them directly. They will ask you a few questions like number of speeds, auto or manual and so on and give you the right info. Putting the wrong fluid in there can cause severe damage to your transmission.
It might not HAVE one. Some newer toyotas don't have this because the transmissions are sealed and the fluid is expected to last up to 80k miles. The fluid is often special, and the fill hole is on the side of the transmission like a rear differential. Check with your local dealer about this. If it is this type, they'll tell you that the fluid must be heated before putting it in and they have…
On a 1998 Mercury Mountaineer : Using a funnel , add the automatic transmission fluid through the automatic transmission fluid dipstick tube . It is located near the firewall , just to the right side ( passenger side ) of the engine , where the transmission is bolted to the rear of the engine . ( the type of transmission fluid to use should be engraved into the dipstick )