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I need help choosing which yoke I need since there are several lenghts.
My driveshaft uses 1330 u joints.
I removed my tailshaft housing and from the end of the shaft to where the splines end is 5". There was no o-ring on the shaft. The shaft has a threaded hole in the end.
Thanks!
4L80E output shaft
4L80E output shaft length
Last edited by tvanlant; Sep 16, 2014 at 07:35 AM.
Do you already have the driveshaft? If not is someone building or are you? Because you need to have proper engagement on the slip yoke into trans at ride height. So a little more detail of what you are trying to accomplish then the correct answer can be given. Because if you are trying make up for a short shaft by using a longer yoke it can cause too much wear on the bushing in the tailshaft housing.
Do you already have the driveshaft? If not is someone building or are you? Because you need to have proper engagement on the slip yoke into trans at ride height. So a little more detail of what you are trying to accomplish then the correct answer can be given. Because if you are trying make up for a short shaft by using a longer yoke it can cause too much wear on the bushing in the tailshaft housing.
I used GMpart # 22944357 for a 3/4 ton Silverado. It uses the 1350 u joint.
Note how long it is vs. the TH400 yoke supplied by Strange as delivered when they built my driveshaft.
I found the part # through parts.com search. I think you could also search for the right yoke by cross referencing spicer ujoint part #s vs. vehicle model #s using the 4L80 and 1330 ujoint. That's more or less what I did to find the right yoke.
It is worth also noting that the 6L80 and I'd suspect that the 4L80 uses a booted yoke seal. This creates a scenario where the yoke hangs out of the tailshaft housing significantly further than an older trans like the TH400.
Trucks use a long yoke because they have a ton of suspension travel. With the suspension travel the yoke needs plenty of room to slide in and out, which is why the GM yoke is so long. For a car, it's overkill, although more spline engagement is always better.
Trucks use a long yoke because they have a ton of suspension travel. With the suspension travel the yoke needs plenty of room to slide in and out, which is why the GM yoke is so long. For a car, it's overkill, although more spline engagement is always better.
Andrew
Andrew,
Agreed, but also note the 6L80 has the rubber booted seal, which sticks out 1 1/4" or so beyond the end of the housing. You need a yoke that much longer just to get normal engagement.
I don't know if the 4L80 has such a seal or not. I suspect some do, at the least.
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4L80E slip yoke selection help 
