Winter project help
Race Director
Joined: Mar 2017
Posts: 11,923
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From: Virginia
As an 80/4-speed owner, I'm interested to see how you do. My transmission is very cranky, though it has 116K miles on it.
That's the best reason of all!
Sometimes mine still shifts like I'm stirring a trashcan filled with doorknobs with a shovel, but making sure my linkage connections were tight made a huge improvement.
Could be a clutch adjustment. If I shift into first, then into reverse, mine doesn't grind.
It could be original. It's easy enough to do without pulling the transmission. I used an oil suction gun to get the last of the old stuff out (more important on the differential), and replaced with synthetic. That, too, made a big difference in shifting.
Along with your first reason, this is a great reason to do it!
That's the best reason of all!
Sometimes mine still shifts like I'm stirring a trashcan filled with doorknobs with a shovel, but making sure my linkage connections were tight made a huge improvement.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,159
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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I dont know the Borg Warner tranny but the muncie has no synchros for reverse, so you HAVE to put it into first before reverse to eliminate the risk of grinding. Yours may be the same. Rebuilding the shifter will help as well, if you have a Hurst shifter, they are tough to get into the reverse alley to shift into reverse. Try thegearbox.org for parts
this what should be in there
http://www.thegearbox.org/SuperT10.html
this what should be in there
http://www.thegearbox.org/SuperT10.html
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,783
Likes: 400
From: Paoli, IN
St. Jude Donor '17, '19
I dont know the Borg Warner tranny but the muncie has no synchros for reverse, so you HAVE to put it into first before reverse to eliminate the risk of grinding. Yours may be the same. Rebuilding the shifter will help as well, if you have a Hurst shifter, they are tough to get into the reverse alley to shift into reverse. Try thegearbox.org for parts
this what should be in there
http://www.thegearbox.org/SuperT10.html
this what should be in there
http://www.thegearbox.org/SuperT10.html
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,159
Likes: 9,286
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I'll dig up the old gears that were in mine, ....not pretty. I would tear yours apart and see what else you need. Everytime I looked at a set of gears and synchros, it just kept getting to the "while I'm in here" disease. I think 3rd gear looked fine but I had to change the input shaft/ 4rth because the end of the shaft had bushing wear, first and second were worn at the engagement surface and the end of the teeth were worn/ rounded for the syncro alignment. When second gets worn it will pop out under deceleration.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,783
Likes: 400
From: Paoli, IN
St. Jude Donor '17, '19
What is the difference between the SuperT10 and the regular T10?
Also, will this flywheel work without any modifications? It has a 2-year warranty over the usual 90 days.
https://www.rockauto.com/en/moreinfo...&jsn=11&jsn=11
My alternative was going to be this one:
https://www.rockauto.com/en/moreinfo...&jsn=10&jsn=10
Also, will this flywheel work without any modifications? It has a 2-year warranty over the usual 90 days.
https://www.rockauto.com/en/moreinfo...&jsn=11&jsn=11
My alternative was going to be this one:
https://www.rockauto.com/en/moreinfo...&jsn=10&jsn=10
Last edited by ~Stingray; Dec 31, 2018 at 05:07 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,159
Likes: 9,286
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
The first doesnt show any useful information. the second one says 168 tooth flywheel. have you purchased a bell housing and a starter yet?. they all have to work together along with the clutch. 168 needs a 11 inch clutch and a larger bell housing than the 10.5 inch 153 tooth setup
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,783
Likes: 400
From: Paoli, IN
St. Jude Donor '17, '19
The first doesnt show any useful information. the second one says 168 tooth flywheel. have you purchased a bell housing and a starter yet?. they all have to work together along with the clutch. 168 needs a 11 inch clutch and a larger bell housing than the 10.5 inch 153 tooth setup
I am also getting this for the clutch rebuild.
https://www.rockauto.com/en/moreinfo...jsn=__GIP__2__
Last edited by ~Stingray; Dec 31, 2018 at 06:56 PM.
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Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,783
Likes: 400
From: Paoli, IN
St. Jude Donor '17, '19
OK, Rescue Rogers just enlightened me that the manual has a welded crossmember for the transmission. Besides cutting the crossmember and installing a flange that can be removed later, what is the best way to get the transmission out?
If i did cut it and weld on flanges, how much do i compromise the rigidity and support of the car?
If i did cut it and weld on flanges, how much do i compromise the rigidity and support of the car?
Race Director
Joined: Mar 2017
Posts: 11,923
Likes: 4,495
From: Virginia
80 or 81? You already have a bolt in crossmember with the manual! You can get an aftermarket replacement if you need space for a true dual exhaust, or cut and weld what you have.
Last edited by Bikespace; Jan 9, 2019 at 09:04 AM.
Le Mans Master
Joined: Aug 2005
Posts: 6,524
Likes: 1,956
From: Temple Terrace Florida
Regarding the cross member, as long as you are keeping the original transmission in the car, there is no need to add a removable cross member. You can remove the transmission without removing the engine. Do some searching on the forum and you will see how it's done. I would add a removable cross member if I planned to put in a Tremec overdrive transmission. I put a Tremec in my 66 without removing the engine. It was not fun, but doable. The M-21 in my 68 has been out a few times since I bought it in 1972. No need to remove the engine. Once apart, I would carefully check the ring or starter gear. They are easy to replace if the flywheel is out of the car. Lastly, if you change the flywheel or pressure plate, I would have a machine shop balance the pair as a unit and leave a witness mark for assembly. Good luck. Jerry
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,783
Likes: 400
From: Paoli, IN
St. Jude Donor '17, '19
I will have to admit, i have not spent the time to actually look under there. But was told 1980s manuals were solid and autos were the ones that were bolted on.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,783
Likes: 400
From: Paoli, IN
St. Jude Donor '17, '19
Regarding the cross member, as long as you are keeping the original transmission in the car, there is no need to add a removable cross member. You can remove the transmission without removing the engine. Do some searching on the forum and you will see how it's done. I would add a removable cross member if I planned to put in a Tremec overdrive transmission. I put a Tremec in my 66 without removing the engine. It was not fun, but doable. The M-21 in my 68 has been out a few times since I bought it in 1972. No need to remove the engine. Once apart, I would carefully check the ring or starter gear. They are easy to replace if the flywheel is out of the car. Lastly, if you change the flywheel or pressure plate, I would have a machine shop balance the pair as a unit and leave a witness mark for assembly. Good luck. Jerry
I don't understand the witness mark for assembly. What will this mark represent?
Le Mans Master
Joined: Aug 2005
Posts: 6,524
Likes: 1,956
From: Temple Terrace Florida
When the flywheel and pressure plate are balanced, the machinist will leave a dab of paint or some kind of mark so when you put everything back together with the clutch disc in between, the pieces will be balanced as a unit. If the flywheel is good, it can be ground or cut. The starter ring can be changed by applying heat to the ring and dropping it over the flywheel. Jerry
Race Director
Joined: Mar 2017
Posts: 11,923
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From: Virginia
Unless you already have one, or are restoring a split-window, there's no reason to use a T-10 instead of the more recent Super T-10 that is appropriate to your car. Either way, you are likely to want to rebuild it, while it's out of the car. You can even get a new one.
http://www.5speeds.com/
http://www.richmondgear.com/
Race Director
Joined: Jul 2015
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From: SW Florida.
reading thru your symptoms, you need a clutch. if the trans grinds going into second and or third, it needs synchros. if it whines like a b!tch in first, second and third but shuts up in 4th, it needs cluster gear bearings. if it does neither, it needs seals. the clutch not fully disengaging will make it hard to shift into gear from neutral. and no reverse has a synchro so they all will grind unless you stop trans with another gear first. if really bad clutch, you have to shut off engine and shift into gear then start the engine, assuming the reverse lockout is disconnected.
Last edited by derekderek; Jan 20, 2019 at 07:29 AM.