driveshaft recommendations

[firemedicsafd]

I have aquired and bolted in a D60 GM and 14b FF into my K5 blazer. It has a 700R4 and NP 241 T case with slip yoke output shaft. I have to buy new driveshafts cause i know mine wont work. MY question is, What is the size of the pinion yokes for the stock D60 and 14B? What size should i upgrade to during purchase to eliminate breakage when the T case gets switched for a 205? Should i stay with steel or switch to aluminum? Thanks for your help!

 

[owenst7]

Steel.

Stock GM 60F - 1310
14bff - 1350

If you're going to be hard on things, the front should be upgraded to something bigger. The problem with the 1350 joint is that it doesn't have very good angle ability. I personally think running a 1410 makes the most sense for front and rear (especially because of the geometry of the front suspension).

 

[K85 Octane]

I would run the stock shafts until you get the 205 in. You might end up having to change several things. Run a conversion joint for the rear = done. The front should be the same as the old 1/2 ton axle.

If you have moved the axles apart or lifted the truck at the same time, then true, the shafts will be too short. However, I would probably re-tube them and run them. The 205 might have different yokes, flanges, driveshaft length demands, etc etc.

 

[firemedicsafd]

i had the lift in with the half ton driveshafts so they should work just get a conversion joint for the rear?

 

[80' 427]

I am running stock shafts in my 1 ton. The front is a 3/4 ton shaft.

 

[blazinzuk]

Leave the 241, 2.72 crawl ratio to a meager 1.96 for the 205, alot less need for a doubler with a 700 and 241.

Do a SYE if you can for the 241 and upgrade to 1350s. Although I totally agree with Owenst7 and actually run a 1410 up front, because of the greater angle capability, the reason I say 1350 is because its whats everyone is running. I broke a joint at KOH and while it was kind of a bastard joint, NOONE had a 1410 or my stupid Ford joint ( its a stock Ford joint I run, don't even remember why) but everybody had 1350 joints, I mean everyone.

Although 1410s are big and beefy my rear will get changed to 1350s eventually.

Oh and yes stay steel on the driveshafts.

 

[K85 Octane]

i had the lift in with the half ton driveshafts so they should work just get a conversion joint for the rear?

yes, I believe it's a 1310/1350 conversion joint. I believe the distance between T-case and axles is shorter with a 1 ton set up than the half tons, so make sure your collapse length is ok.