74 chevelle 28 spline?!?!?!?
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pila
redrider
JF74chevelle
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74 chevelle 28 spline?!?!?!?
by JF74chevelle Thu Nov 05, 2015 10:52 pm
Does my 74 chevelle have a 28 spline? Idk where to find the info on this
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Re: 74 chevelle 28 spline?!?!?!?
by alowerlevel Fri Nov 06, 2015 1:24 am
28 spline what? If your asking about axles then yes they are 28 spline.
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Re: 74 chevelle 28 spline?!?!?!?
by JF74chevelle Fri Nov 06, 2015 1:56 am
my bad I left that off lol thank you for the helpalowerlevel wrote:28 spline what? If your asking about axles then yes they are 28 spline.
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Re: 74 chevelle 28 spline?!?!?!?
by redrider Wed Nov 18, 2015 11:59 am
Any idea what the stock gear is on a non posi 74 10 bolt rear?
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Re: 74 chevelle 28 spline?!?!?!?
by thatfnthing Wed Nov 18, 2015 1:11 pm
Likely 2.73 (mileage) or 3.08 (performance)
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Re: 74 chevelle 28 spline?!?!?!?
by Limey SE Wed Nov 18, 2015 3:09 pm
Mine is a 2.56 ickkk icckkkkkk
___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
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Re: 74 chevelle 28 spline?!?!?!?
by pila Wed Nov 18, 2015 4:03 pm
My new '77 Elco was a 2.56, and My Malibu has 3.08 on the build sheet but it turned out to be a 2.73 !
2.56 seems low, but my Currie nine inch Ford in the Elco project is a 2.50, which I spec'ed for the 5oo torque monster, which will rarely see any high RPM...
Don't know what the lowest ratios are out there, but some 5th gen Elcos ('78-'87) seem to have like 2.29 ratios in some of them. All about gas mileage I would suppose....
redrider; you can find your diff. ratio stamped on the front side of the right axle housing tube, usually near the center housing casting. I don't have the code handy, but folks here can tell ya what it is....
2.56 seems low, but my Currie nine inch Ford in the Elco project is a 2.50, which I spec'ed for the 5oo torque monster, which will rarely see any high RPM...
Don't know what the lowest ratios are out there, but some 5th gen Elcos ('78-'87) seem to have like 2.29 ratios in some of them. All about gas mileage I would suppose....
redrider; you can find your diff. ratio stamped on the front side of the right axle housing tube, usually near the center housing casting. I don't have the code handy, but folks here can tell ya what it is....
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Re: 74 chevelle 28 spline?!?!?!?
by thatfnthing Wed Nov 18, 2015 4:21 pm
pila wrote:My new '77 Elco was a 2.56, and My Malibu has 3.08 on the build sheet but it turned out to be a 2.73 !
2.56 seems low, but my Currie nine inch Ford in the Elco project is a 2.50, which I spec'ed for the 5oo torque monster, which will rarely see any high RPM...
Don't know what the lowest ratios are out there, but some 5th gen Elcos ('78-'87) seem to have like 2.29 ratios in some of them. All about gas mileage I would suppose....
I can see where a stump-pulling 500 could easily overcome the 2.56, but the 5th gen's running 2.29 with an OD trans really surprises me. The 200-4R's OD gear is .67, which would make an effective ratio of 1.53 -- when OD kicks in at 40-45 MPH and the TC locks up, the RPMs would drop so low that I don't see how the thing wouldn't just die. I drove mine with the stock 2.73 gear for a week or two after swapping in the 200-4R just as an experiment, and when OD kicked in the RPM's fell so far below the engine's power band that the car became an unresponsive slug. I can't imagine it would even keep running with a 2.29 out back...
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Re: 74 chevelle 28 spline?!?!?!?
by Limey SE Wed Nov 18, 2015 4:28 pm
Its almost half way between the pumpkin and the brake backing plate on right side of car facing front of car.
___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
Limey SE- Management
- Street Cred : 98
alowerlevel- G3GM Member
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Re: 74 chevelle 28 spline?!?!?!?
by ant7377 Thu Nov 19, 2015 11:05 am
My 73 had 2 73 's the 77 had 2 43's if I remember right.
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