changing my trans filter

[superduty12v]

im changing the spin on, the current ones leaking. i got a quart of dex/merc ATF to replace what ive lost and the 8 oz in the filter. am i good to go with this? or should i just drain it and refill it? and what fluid do i refill it with and how much, never did any trans stuff to this truck. just need some guidance here.

 

[spg]

You might want to drop the pan clean it, change all the fluid and filter . Then fill with synthetic fluid . I recommend Amsoil.

 

[89F350]

I changed mine with the allison spin-on filter (the red one), and 8 qts of Castrol Transynd. Just like changing the engine oil; done in 30 minutes.

I also drained the transfer case, and refilled with Transynd. Drained about 1.6 qts original factory oil (I measured it); the refill took just about 2 qts. Walmart sells a little hand pump for draining outboard motor lowers. It's on the shelf near their boat stuff. This pump screws right onto a 1 qt oil container. Makes refilling the t-case easy. Take about a bazillion pumps, though. A friend uses an old holley self-contained electric fuel pump.