Transfer Case Drop Kit

[Leper]

Bolt grip is the length of bolt between the nut and bolt head. If the grip length is too short it cannot be properly preloaded and will have a tendency to loosen; Think of the bolt as a spring with a high stiffness. The spacers basically insure that the spring is long enough for the given diameter. As a general rule of thumb, the grip length should be at least 2.5x the bolt diameter. Make any sence?

It's not going to change anything if you move the spacer to the other side, as long as it is still there.

 

[roadnotca]

"Bolt grip is the length of bolt between the nut and bolt head." Bolt grip is the unthreaded portion, or shank of partial threaded bolts. A full thread bolt has no grip. Grip is sometimes used to refer to the stackup of mating part thicknesses.
"If the grip length is too short it cannot be properly preloaded and will have a tendency to loosen;" The shorter the bolt, the less tendency to unwind. The manufacturers will not design a joint with extra length fasteners needing spacers. If the stackup of two sheet metal brackets adds up to 1/4", they'll use a full thread bolt, two washers and a nut. I've never been to Flint, MI but I suspect the spacers allowed for drive shaft tuning for the 10, 20, 30 different drive train combos coming down the production line. That looks to be the cheapest and easiest way to tune out vibes, which is exactly one of the methods we use.
Everybody in CK5 should have this book, amoung others.

 

[loafer]

Bolt grip is the unthreaded portion, or shank of partial threaded bolts. A full thread bolt has no grip. Grip is sometimes used to refer to the stackup of mating part thicknesses.

I'm not trying to be a pecker head or anything, but this is not correct.

The shank is the unthreaded length. Grip refers to the portion of the bolt that is actually "stretched" when tightened, or the length between the bolt head and the nut head. I attached a PDF file to better illustrate this.

I'm not familiar with the handbook you are referring to, but it sounds like it may have over-simplified the mechanics of bolted connections.

Shigley's "Standard Handbook of Machine Design” or Shigley's "Mechanical Engineering Design" is an excellent reference for bolted connections.

Going back to the t-case drop; if you use the same length bolt, and retain the same grip length as factory, than you don't need to retain the stock spacers, providing there is some other chunk of steel in there of similar length.

 

[roadnotca]

Shigley and the Natl. Aerospace Standards Commitee are in disagreeement, thats all. Not saying either is right, its typical of the whole industry.
Edit: Shigley, Mischke & Budynas. Sorry, mines at work, but I think my copy was printed before Budynas.

 

[gmcjimmy4x4]

I have set of spacers im not using anymore. There layers of .25 steel with grade 8 hardware. Youcan stack as many as desired. Ill sell them cheap.let me know if u want them.Ican send you pics by email.

 

[RootBreaker]

I used 1x2 square tubing about 6 years ago and they are still going strong.

ditto

 

[caleb22]

gmcjimmy and Leper...I have emailed and pm'd you guys. I'm interested just need to hear back from one of you first.

 

[caleb22]

Anyone have any 1" stock I can buy/use to drop my t-case?