Munci oil change.
Thread Starter
Intermediate
Joined: Sep 2013
Posts: 37
Likes: 0
From: san jose california
Munci oil change.
I have a 68' with the 327/300 h.p engine.It has the Muncie 4spd It doesn't leak but I have never checked it. I have heard there is no drain plug on the Muncie. I figure after 50 years in there it would do no harm to change the fluid.
Race Director
Joined: Mar 2018
Posts: 10,770
Likes: 2,199
From: Golden Colorado
No drain plug
Hard to get old oil out. You can try to siphon it but it's kinda thick. You could try the gear oil pump they sell at parts stores. When you put the new in I strongly recommend Lucas gear oil additive with it. Good luck.
Team Owner
Joined: Aug 2000
Posts: 21,468
Likes: 463
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
...one of the best & cheapest pumps to use is a Mercury Mercruiser lower unit fluid pump. I've had the same one for over 20yrs, use on my boat's lower unit, C3 differentials & manual transmissions without bottom plugs. I think they are around $18-24 now, but well worth it. Mine is. They were designed to pump 90w gear oil. I believe I just have to put a longer hose on the suction side as it comes with a hard plastic tube that draws oil out of a 32oz bottle. I just slipped a longer 12" flexible hose over the tube.
Race Director
Joined: Mar 2017
Posts: 11,960
Likes: 4,518
From: Virginia
There are several cheap suction pump options on Amazon. I picked up one of these for $15-. I've used it a few times, once to get the last of the sludge out of my B&W Super T-10 (which, thankfully, does have a drain plug to get the worst of it), and once to clean out a differential.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
When I bought my '72 the muncie had a lower drain plug, but the thing shifted like a truck, hell with that, I drained the old crap out and loades it up with engine oil....straight weight, can't remember what it was though...30/40/50?? anyway, it shifted slick as snot....
I think I put some ATF in there too.....ran it on freeways and around town for a few years.....
would have kept it if I could have easily gotten an overdrive in it....
I think I put some ATF in there too.....ran it on freeways and around town for a few years.....
would have kept it if I could have easily gotten an overdrive in it....
Burning Brakes
Joined: Dec 2006
Posts: 979
Likes: 254
From: Bethlehem, PA
https://www.widman.biz/uploads/Transaxle_oil.pdf
then refill with this
https://www.napaonline.com/en/p/SLRSL24239
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Burning Brakes
Joined: Sep 2016
Posts: 958
Likes: 449
From: Dutchess county New York
Yeah, well I will admit to weakness. I wanted it changed but realize I will probably never do it again. so I took it to a trusted shop. The guy that owns it has had his own C3s for many years and I've known him a long, long time. We sat there and chewed the fat while a younger guy did it up on a lift in a few minutes. AMSOIL 80W90 synthetic gear lube. Only thing other than the required inspection I've paid anyone to do and for $40 bucks it was well worth it. I'll probably have him do the rear end too.