Longer slip-yoke for th350?

[DieselTech]

I recently took my driveshaft to the shop to have them lengthen and balance it. They talked me out of getting it lengthened, because I'm getting ready to lower the truck 2"/3", and they said the driveshaft would be just right.(it only needs to be about an inch to inch and a half longer). They also said as an alternative, there is a longer version of the th350 slip-yoke, that ia about an inch longer than the common yoke. Anybody have any more info on this? I'm fighting a vibration...and I believe its from the slip yoke not being in far enough.

[adh383]

how far is the yoke in the trans.? I think mine is about 1 1/2 1 3/4 in. I think its better not to use extra yoke to compensate for drive-line length- also, check your trans mount for tight and BROKE.

[Scotty_S-15]

And, if you check the $$ for that yoke, wow. I think I looked into that once.

........... But yes, a yoke not in far enough can be the cause of vibration. Just slip under the truck and wiggle the yoke around. If it moves plenty, there's a good chance it's doing just that at speed.

............ Another quick thought/quick fix, I think JTR sells pads (look like lowering blocks) to relocate the rear housing an inch or so fore or aft. Then you can say you've got an "altered wheelbase" S10! http://www.s10v8.com/images/smilies/icon_razz.gif

[Ryoung68]

The JTR axle offsets move the axle forward or backward 1/2" and are listed under part #S10-301, $22.00 including shipping charge.

[DieselTech]

Thanks, guys. Let me ask you this: When you lower a truck, how much does this affect the amount that the slip-yoke goes in? I know that when I've lifted trucks before, i had to get longer driveshafts made for them. Any rule of thumb on lowering? I need about one more inch of the yoke to go in, and it should be right. I plan on lowering the rear 3".

[spacecadet]

It would be easier to get a longer driveshaft and have it cut down to the size you would need and have that balanced. Since you plan on lowering it anyways. Besides other people have ran into the same situation and you could always sell the unneeded shaft on ebay.



But since cost vs. easy is always the biggest concern, The longer input shaft would be a fast easy almost bolt-on.



Talk toooo much.....

Tired. Space.