1310 U-joint behind big block?
Thread Starter
Race Director
Joined: Jun 2000
Posts: 10,053
Likes: 679
From: FL
1310 U-joint behind big block?
So, getting closer to getting the Corvette back on the road.
Swapped the small block, 5 speed for a 496 big block backed by a T-56 Magnum to a gtr1999 3.73 12 bolt. Vendor sold me a 1310 yoke for the T-56 due to the C3 tunnel size.
Will a 1310 u-joint live behind a ~600 hp big block? Street tires. Pinion gear is a 1330 U-joint. Other option is to step up to a 1350 yoke but the vendor is about 3 weeks out on them.
I am still ging to have to clearance the tunnel a bit for the 1310 since the yoke is further back due to the tranny length. Obviously, a 1350 is much bigger.
Also, has anyone squeezed a 3" driveshaft into the C3 tunnel or am I stuck with a 2.5" driveshaft?
Just trying to figure out my best course of action.
Swapped the small block, 5 speed for a 496 big block backed by a T-56 Magnum to a gtr1999 3.73 12 bolt. Vendor sold me a 1310 yoke for the T-56 due to the C3 tunnel size.
Will a 1310 u-joint live behind a ~600 hp big block? Street tires. Pinion gear is a 1330 U-joint. Other option is to step up to a 1350 yoke but the vendor is about 3 weeks out on them.
I am still ging to have to clearance the tunnel a bit for the 1310 since the yoke is further back due to the tranny length. Obviously, a 1350 is much bigger.
Also, has anyone squeezed a 3" driveshaft into the C3 tunnel or am I stuck with a 2.5" driveshaft?
Just trying to figure out my best course of action.
Burning Brakes
Joined: Sep 2006
Posts: 1,242
Likes: 12
From: Kalispell MT
I'm pretty certain that I went with 1310 at Tremec output to the D-shaft and I'm positive that used 1330 connecting to the diff. Used 1350s to the new 3 1/2" half shafts. 555cu in motor with lots of torque driving it and no issues. Drive shaft diameter should not be a problem but pending your drive shaft length the front joint could be a gating factor. When you look at the tunnel space available it tapers very quickly behind the tranny shaft joint. So if you run a TKO tranny and your shaft is a too short the front joint could have a clearance issue (irrespective of 1310 or 1330). Make the shaft too long and you WILL knock out the front yoke welsch plug just enough to spritz tranny fluid where you don't like it.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Remember the drive shaft does not experience the TQ multiplication like the 1/2 shafts. So it can use smaller u-joints. I think my tko came with 1320's
NHRA requires a drive shaft safety loop.
NHRA requires a drive shaft safety loop.
Safety Car
Joined: Oct 2004
Posts: 3,927
Likes: 740
From: Youngstown Ohio
I have a 3" aluminum driveshaft, along with 1330 U-joints. Fits with no problems in the tunnel. No extra room, just make sure it's centered in the tunnel. ( Auto trans, small block, '69)
