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Hello to all, I am changing the fluid on my 4 speed manual trans and need to know the location of the drain and fill plug. Is it on the drivers side or passenger side? All I can find on the internet is pictures for the automatic trans. Here are my corvette specs.
In my 80's B&W Super T-10, the plugs are on the passenger side, away from the shift linkages. Muncies are the same. If you are lifting the car in a way that the side will matter, you probably won't get the level correct when you refill. Race Ramps in front, jackstands in the rear, and you can get the car elevated and level.
Pro-tip: Take out the top plug first. If you can't get it out, at least you haven't emptied the transmission and stranded the car.
or a cheap, if not free squeeze bottle with a foot of tubing on it. And DO NOT be tempted to put in any kind of synthetic trans lube. the old synchro's won't like it at all. stick with dyno oil.
or a cheap, if not free squeeze bottle with a foot of tubing on it. And DO NOT be tempted to put in any kind of synthetic trans lube. the old synchro's won't like it at all. stick with dyno oil.
I use a cheap transfer pump. You can get pumps that screw into your gallon of gear oil. The giant turkey-baster type is helpful for the differential, that does not have a drain plug (unless a PO put one in).
I use GL-4 synthetic. YMMV, there are lots of threads to read on that subject.
Last edited by Bikespace; Sep 10, 2021 at 05:58 AM.
I used a 4 ft length of rubber hose from the hardware store with a funnel at the top. Fill while standing next to open hood. Keep drain pan under tranny in case you over fill a bit.
May or may not be a ton of threads on the topic. Although I have read a few. most agree. Do NOT put synthetic gear oil in these old transmissions.
I tried it. Super horrible results. drained it out. put in a standard mineral based gear oil. shifting perfectly again.
Synthetic gear oil's are to slippery for these old transmissions. They were not designed for it. Period.
Fill and drain plugs are on the right (passenger) side. Use GL-4 Conventional oil. This is the one that best suits older manual transmissions with "yellow" metal parts. Read what 4-vettes says.
This extractor makes easy work of getting the old stuff out, and putting the new stuff in. Use it to suck the old oil out, clean it out a bit, and use it to suck the new oil out of the bottle and into the trans - a few refills in this with the new oil and you're done when it begins to dribble out of the fill plug. I drive it a bit and recheck because it usually will take another bit to top it off after driving. Not all that expensive for making the job much easier - and I think it's very likely you don't have a drain plug. Have fun, Paul https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
Last edited by Hopper12; Sep 10, 2021 at 11:11 AM.
What is the best way to get that square head fill plug out? I tried a 9/16 wrench and it keeps slipping off, and so does a crescent wrench, and it is too tight with the exhaust in the way I cannot get a socket in there.
What is the best way to get that square head fill plug out? I tried a 9/16 wrench and it keeps slipping off, and so does a crescent wrench, and it is too tight with the exhaust in the way I cannot get a socket in there.
Thanks
I use 8 point sockets on transmission and differential
72 manual trans fluid change
