pmr2000

Need to change out both on my stock '75 coupe. Have a pump, does anyone know which side of the car the drain and fills are on?

I have an inclined driveway so was thinking of driving it up on ramps on the incline to level it out which is my oil change method.

So assuming the drive it up on front ramps for trans and of course rear ramps for diff? Or would jack stands be better?

Thanks trying to save some time jocking the car around!

7T1vette

There is no 'drain' on either the trans or the differential; there is only a 'fill' plug. Drive the car for a while to get the fluids warm...easier to suck out. Leaving a little of the old gear lube in them is no big deal.

MelWff

the fill plugs for both the differential and transmission are on the passenger side.

pmr2000

Thanks!

mortgageguy

Use ramps for rear and use the jack stands also as a secondary safety measure. I never solely rely on one or the other. Redundancy is a good thing.

pmr2000

Agreed! I think there is a drain for trans just not rear correct?

Easy Mike

I think you're going to be disappointed unless you have an aftermarket tranny pan.

MelWff

your profile says you have a 4 speed, so there is no drain pan and unless someone modified your muncie or your have an m22, I believe there is no drain plug

pmr2000

Ok thanks I do have one of those cheapo pumps so I guess I will be pumping both out....

BKarol

Didn't they install Borg Warners in 75?

Really doesn't matter at this point since you will have a pump.

fishslayer143

after draining differential, put 6 oz of Friction Modifier in first, then fill with appropriate gear oil til it runs out hole on level ground

Wee

The Muncie in my 72 has a drain and it's not a M22....That said I have no idea what kind of transmission is in a 75 or if it might have a drain.

Brian

joewill

I have a BW super T10 4 speed dated 1974 sitting in my garage. probably the same as what is in your 75. it has a drain plug. on the right side, near the bottom.. also all the muncies from 1971 on ( and most of the 1970's, have a drain plug.

yes you have pump out the rear differential fluid, get as much as you can out of there. don't forget to add the special posi additive oil to it when refilling.

pmr2000

Thanks guys do have a drain but could not get it off so pumped out was able to add 1.5qts through fill. Can't even see the rear so think I will take off rear right tire next week to try it...

MelWff

I wish I had a drain. For future reference Sears and others sell 8 point sockets to get the plug out.

Wee

A set up like this will help getting the fluid back in the differential....It's just a funnel with a long piece of tube.




Brian

C3 4ME

ST 10s have a drain plug, it's the bottom plug on the passenger side. On the rear end, I use I believe it's a 13mm 12 point socket on the square pipe plug, which fits is perfecly. I use a 6oz bottle of the posi additive and then reuse the bottle with the regular gear oil. The 6 oz bottle works well to fill through the fill plug.

BKarol

If you can't get a wrench in there for the diff plug, you could also use a 5/8" socket, 8pt. I used a swivel and long extension which made it easier on my 78. Good luck.

pmr2000

Could not get any socket between the fill and the exhaust.

Cat has been removed converted to true dual so maybe thats why clearance issue.