RETRO-Mod: Jeep intermediate steering shaft

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1987 GMC Jimmy

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I don’t think there are any advantages. I’ve only found one shaft that was trashed, and it was probably repairable. That video’s pretty good. It tells you to shave a notch in the column end so the bolt will go through if I’m not mistaken. That’s not necessary. Just heat, compress, bolt in a side, extend, and bolt in the other. Or that’s how I did it. Just don’t burn yourself. Assuming your steering parts are free of play, you can look at them as you or someone else turns the wheel. If the wheel is turning and you don’t see the end of the intermediate shaft start to move the gearbox input, it’s the shaft. If everything looks tight up top, but as your turning, it takes a second for the wheels to start moving, it’s the Saginaw box. If it’s a high mileage vehicle, it’s probably a little bit of both.
 

dougbert

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Camar068

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lol I was about to quote you from the other post.
 

Mad gimp

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I put a jeep shaft on my cutlass. Its a common upgrade for us g body folk. But untill now i did not know this can be done on square body trucks. So now ill be getting one for the dually.
 

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I put a jeep shaft on my cutlass. Its a common upgrade for us g body folk. But untill now i did not know this can be done on square body trucks. So now ill be getting one for the dually.

You’ve got a nice one there! I love G Bodies, and their bigger, more utilitarian cousin, the B Body.
 

Mad gimp

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You’ve got a nice one there! I love G Bodies, and their bigger, more utilitarian cousin, the B Body.
Ive got two g bodys. The one i race and the "wifes" hotrod

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Anybody run into an issue with the Jeep shaft splined end not fitting onto the GM steering box? Happened to me, bought an XJ shaft, shortened it and it won’t go on. Then I broke out the caliper and the Jeep shaft splines opening is at least 0.1” smaller than the splined shaft on my K20 steering box. Didn’t bother to test it when I took the old shaft off because it seemed like everyone was doing this mod without any issues.


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I ran into the opposite... the steering box was fine but the end of my column is splined and the jeep shaft is not. How do i make this happen? Do i need a diff shaft?

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78C10BigTen

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Just for those who might be interested. I did mine a little different than Retro's. You can do as you please, but this worked best for me.

The bolt up at the steer column that Retro mentions you have to hold somehow, it's a square keyed shoulder on the bolt. So simply hold it into the shaft, and then can use your ratchet to pull the nut all the way off. That went really smooth and I expected a problem after reading his instruction, then after it was apart I noticed the square shoulder.

Instead of using a torch or BFH to get the existing shaft to collapse, I didn't collapse it. I took the nuts off the rag joints, loosened the 12pt 11mm bolt holding the rag joint onto the splines of the gear box, then pushed the rag joint further onto the gear box splines, and that gave me plenty of room to get the shaft separated from the rag joint and pulled the shaft off the column. Then slid the rag joint off the splines of the gear box. That too went pretty easy.

I put RTV silicone, any color will work since heat isn't an issue, on the smaller shaft to be slid into the larger one before I started the swap. That was no good. When I slid the 2 pieces together, it just peeled the dry rubbery RTV off the shaft. So I recoated it with RTV and slid them together while wet about as far as I was going to need it to slide for install. Installed both ends, tightened both ends, now I'm waiting for the RTV to dry before I take a test drive so that while it's wet, it just doesn't squeeze out up into the shaft or out of the shaft doing no good at all. We'll see how that works out, but I think it's going to be fine, the way the dry RTV felt on the first try.

Old OEM 85 K1500 Shaft, compared to the Jip Upgrade Shaft
attachment.php
I did mine by separating it at the rag too
 

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Found my stock shaft to have a good bit of play this morning so I just ordered my heep shaft on ebay today. I was curious if there is an updated "preferred" method of doing this? I did read through all of the thread, and kind of figured on heating lightly to compress, then remove original with the wheels locked straight, install heep shaft onto column using the heep bolt, heat if needed to then extend the lower to the box tighten and adjust as needed.

I was also debating on tack welding the upper portion (damper thing) prior to install just to keep things solid and not run into problems. I also think it may need the column shaft to be ground some to clear the heep bolt? Any other new tips and tricks or suggestions for this mod?
 

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@Dutch Rutter I just did mine a month ago. I used a propane torch with a large head to heat it for a few minutes, until the plastic just started to protrude. I then collapsed the shaft. You do need to grind a small slot for the upper bolt, but very minimal. I then bolted the upper part of the shaft to the column, then heat the shaft again, just enough to get the new shaft to fit completely down on the steering box splines.

As long as you don't boil out all the plastic out, I don't think you'll have to weld the top. I believe the plastic melted into the shaft is designed to collapse in a frontal collision.
 

Dutch Rutter

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Great, Thanks Craig! Hopefully mine will go just as smoothly. I'll be sure to post back once I get it all done.
 

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I ran into the opposite... the steering box was fine but the end of my column is splined and the jeep shaft is not. How do i make this happen? Do i need a diff shaft?

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You'll need a different u-joint for the column end. I made a thread about it or posted how I did it in here. Just cut the top joint off the jeep shaft an replace with the right spline joint for the column. I got mine from eBay.

Edit: details for 73-79 installs here:

https://www.gmsquarebody.com/threads/jeep-intermediate-shaft-on-a-early-79-and-down-column.20468/
 

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This is my way of the doing the XJ shaft on the 73-80 trucks. No welding required. Just need a torch, bench vise, ratchet and hammer
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71RAT

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You'll have to excuse the lack of pics. I forgot to put the SD card in my camera and I can't find the cord. :shitsweak: I'll put them up if i find the cord.

!!!This will not work on pre-77 trucks (correct me here if i am wrong) with the splined column shaft!!! You can however, put a newer column in it without much effort I think.


Don't have the $300 for a Borgeson shaft? Don't want to SPEND $300 for basically the same thing? This is your answer for less than $20 usually. I got mine for $5.

Difficulty level: 3-5 (1-10, 10 being most difficult.)

What you will need:

*Steering shaft (From 1988-96 JEEP CHEROKEE)
*torch or cutoff tool
*beer (optional)
*sockets, wrenches, prybar and stuff.
-11mm 12 point and 15mm 6 point for the original steering shaft
-13mm 6 point for the Jeep shaft
-15mm 6 point, 10mm 6 point, pick, phillips screwdriver, prybar for the square steering column
-AH, you might take a full compliment of things for the Jeep steering column, I can't remember what it takes and the last two I got them from had the columns already removed.

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First off, we need to head to the junkyard and get a steering shaft. You can get one off a 1988-96 JEEP CHEROKEE (squarebody style, not a grand Cherokee, and it has to be from that time period.) that hasn't been wrecked in the front or anything like that.

This is the Jeep shaft next to my S10 shaft, which is basically the same as a squarebody shaft.
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If you can't find one with the column or steering box removed, you're gonna have to take the column or box out yourself since the jeep shafts don't collapse easily. You will probably need the pry bar to take the intermediate shaft off the box or column. Keep the bolts because you will need them.

Next you can get to work installing it in your square. Start by removing your old shaft.

On my 1981, I had to remove the damned steering column because 1) I don't have a torch and didn't want to go to work to get one, plus not everyone has one. You may not have to remove your column and 2) the intermediate shaft had to be taken off with a BFH.

There's a 11mm 12 point bolt holding the shaft to the steering box.

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And a 15mm nut holding the shaft to the column. There's a bolt in there with a squared shoulder and it will want to turn as well. hold it somehow while taking the nut off.

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If the shaft doesn't collapse, then you will need to loosen the steering column, there's 2 15mm nuts holding it up under the dash and 2 15mm nuts holding a plate at the end next to the fire wall under the hood.

Once it's out of the way, you can start modifying the Jeep shaft to fit. You can 1) take a torch and heat up two pieces of plastic that are inside attached to the lower part of the shaft and slide the larger shaft off the smaller one. Or you can 2) carefully cut off a section of the larger shaft (DO NOT CUT OFF THE SMALLER SHAFT AT ALL) about 3/4" from the end. I made 2 cross cuts and then cut carefully around not hitting the smaller shaft to expose one of the plastic inserts. Once that is done, you can usually get the larger shaft off the smaller shaft with a BFH and thus exposing the other plastic insert that needs to be removed.

Now you should be able to slip the larger shaft back on the smaller one with relative ease.

This is a good time to start putting the steering column back in and hook everything up. I had my entire column out and managed to plug something in wrong and my truck refused to start...:rofl:

You will probably have to open up the ends of the Jeep shaft slightly to slip them over the splines of the steering box as well as the end of the steering column. I used a large flat screwdriver for this and they slid on easily.

For the bolts, you can either 1) use the original bolts from the GM shaft and drill a hole in the end of the Jeep shaft that bolts to the column, or 2) you can use the original bolt from the Jeep shaft in the original place and let it cut new threads into the side of the column.

Install the Jeep bolt in the steering box end of the shaft.

And then clean up, put tools away and enjoy tighter steering. You WILL need to have the steering aligned as your wheel will be way off.

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I apologize if this gets confusing without the pics, I tried to be as straightforward as possible. Ask me if you need help and I'll do my best to try to resolve any issues you may have.


Does anyone know the difference in the Grand Cherokee and the square Cherokee shafts ? Around here there seems to be a lot more Grands than the base model heeps.
 

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Does anyone know the difference in the Grand Cherokee and the square Cherokee shafts ? Around here there seems to be a lot more Grands than the base model heeps.

From what I've read is the grand Cherokee shafts are too short.
 

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