10 Spline vs 26 Spline Input
Thread Starter
Instructor
Joined: May 2007
Posts: 218
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From: Portland CT
10 Spline vs 26 Spline Input
I am debating whether to go to a new supercase Muncie on the rebuild of my 68. If I go that route, the question becomes do I buy the 26 spline or the 10 spline input shaft Muncie. My 68 came stock with the 10 spline tranny/clutch. Simce the clutch will get changed regardless, what is the benefit of one over the other? Is the 26 spline a better design or capable of handling more load than the 10 spline design?
Would like to hear some thoughts.
Would like to hear some thoughts.
Drifting
Joined: Feb 2006
Posts: 1,840
Likes: 29
From: Towaco NJ
I am debating whether to go to a new supercase Muncie on the rebuild of my 68. If I go that route, the question becomes do I buy the 26 spline or the 10 spline input shaft Muncie. My 68 came stock with the 10 spline tranny/clutch. Simce the clutch will get changed regardless, what is the benefit of one over the other? Is the 26 spline a better design or capable of handling more load than the 10 spline design?
Would like to hear some thoughts.
Would like to hear some thoughts.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
I've seen both 10 and 26 spline shafts twisted behind the splines. If you have enough clutch and tires to do that, I suspect it won't make much difference how many splines there are.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
supercase Muncie even with the 26 spline only has a TQ rating of 375 - 400 or so foot pounds and it's biggest downfall is 4 gears. If you have to have a 4 speed the Tex Racing are pretty good. The TKO 500 (also 500 FP) has a wide gear ratio made for lower numeric rear ends and it's 5 speeds
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
A factory Muncie can handle more than 375 ft/lbs of torque. GM called on Muncie's to handle L-88's, ZL-1's, LS-6's, etc,..all of which had quite a bit more than 375-400 ft/lbs of torque.
Add the beefy Supercase which prevents case stretching caused by the angle of the gears, and you have pretty strong tranny.
Yes, she only has 4 forward gears but it only weighs about 75 lbs. If your rig isn't called on for long highway trips, the original Muncie is a great way to go.
FWIW
Add the beefy Supercase which prevents case stretching caused by the angle of the gears, and you have pretty strong tranny.
Yes, she only has 4 forward gears but it only weighs about 75 lbs. If your rig isn't called on for long highway trips, the original Muncie is a great way to go.
FWIW
