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Re: [GMCnet] lower steering shaft complete new replacement [message #265550 is a reply to message #265453] Thu, 06 November 2014 12:37 Go to previous messageGo to previous message
KB is currently offline  KB   United States
Messages: 1262
Registered: September 2009
Karma:
Senior Member
just an update:

You CAN mix and match various manufacturers u-joints with the DD shafts. They're a standard size. Eg, you can put a Flaming River u-joint on a Borgeson DD shaft (I asked).
The sizes we're dealing with are quite common: the upper shaft is a standard GM steering column (1"-48) and the lower is a standard old style "big GM" power steering size (13/16"-36).
(later GM steering boxes are 3/4" or in some cases, 17mm)

The Borgeson DD slip shaft does NOT come with a grease zerk (though no reason you couldn't add one yourself). The flaming river ones probably do but are nearly double the price.

You can get a stainless inner slip shaft, but the outer sleeve is still just steel. More money of course.
The biggest difference between manufacturers on the slip shaft seems to be the rubber boot they supply.
I wouldn't be surprised to find there was only one source for the steel.

We only need about 10" on the slip shaft, so (in theory) you might be able to get more than one shaft out of a single order (though would need extra boots).

I had hoped this awesome looking ready-made solution from Flaming River would work, but the upper joint is only good to 30 degrees (per their specs) and I'm pretty sure our upper joint is 35 (or more).
Might work, might not:
http://www.summitracing.com/parts/fla-fr1857-16/overview/

Borgeson u-joints are good to 35 degrees, and we already know they work here.

The pinch-bolt type u-joints do require notching the shaft for the shoulder bolt to clear (a good thing), so probably a good fit for our lower u-joint.

So, my current shopping list:
upper u-joint: Borgeson 1"-48x1"DD (stainless: #114352)
DD slip shaft (Borgeson 450024 or others)
lower u-joint: Flaming River 13/16"-36 x 3/4DD pinch-bolt u-joint (stainless: FR2719DD)

I think there are a lot of possible solutions. Thanks to Jim Fawcett for heading down this path and figuring out the sizes.

Karen
1975 26'
 
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