Saving moms YJ - TJ Chassis Swap? - JeepForum.com
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post #1 of 40 Old 08-13-2019, 03:22 PM Thread Starter
MOMSMACJEEP
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Saving moms YJ - TJ Chassis Swap?

My moms 1995 Sahara 4.0L 5 speed frame is rotted badly. I plan to keep piecing it together for her but we want to eventually swap a TJ chassis under it. We are both huge MacGyver fans and love the square lights, so we don't want to sell it for a TJ. How much and where should we look for a rolling chassis? I'd prefer a Rubicon chassis, but I can build that with time.


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post #2 of 40 Old 08-13-2019, 03:42 PM
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Why go with a TJ frame? You can source a used YJ frame or there are comapnies making new frames as well. One offers a hot dip galvanizing option with 10 year rust warranty. If going to a TJ frame, you'd either have to also go to TJ axles/suspension(coil springs/control arms), or else adapt YJ(leaf springs) suspension to a TJ frame.

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post #3 of 40 Old 08-13-2019, 08:41 PM
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I’m not entirely sure a rubicon chassis is an upgrade! Tons of body mount issues.

If it has axles (the only reason I could think a rubicon frame is an advantage if it is an advantage) those are weaker renditions of their historic predecessors. You can be stronger with nice parts in the D30 and an 8.8 which are both less money than D44s and the 31 spline 8.8 is a much stronger than a 44 in oem form.

A YJ donor frame in decent shape can be had for a couple grand or so.

[size=3]Shackles & D-rings are different things.
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post #4 of 40 Old 08-13-2019, 10:47 PM
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This will be safer and likely less expensive than a bunch of hacked up frame pieces welded together https://www.throttledownkustoms.com/...1987-1995.html or do you want Mom riding around in a potential death trap?
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post #5 of 40 Old 08-15-2019, 11:51 AM
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The YJ body won't simply sit on a TJ frame. The TJ frame also is fairly notorious for ripping the front track bar out of the frame.

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post #6 of 40 Old 08-15-2019, 12:43 PM
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The TJ frame also is fairly notorious for ripping the front track bar out of the frame.
First time I ever heard that... I have had a TJ for several years with no issues with frame or trackbars. Then again I don't run stock crap with drop brackets either.
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post #7 of 40 Old 08-15-2019, 06:12 PM
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Yep, last year my buddies ripped out on Little Sluice on the Rubicon. While limping him out came across two others that had had it happen in the past and then early this summer a co-workers boyfriend had the same happen on the Rubicon. All stock mounts ripped right off the frame. Could also have something to do with the type of wheeling. I never had an issue with the TJ I had but it was also a little 4 banger on 33's that never really left the pavement.

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post #8 of 40 Old 08-16-2019, 05:17 AM
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Yep, last year my buddies ripped out on Little Sluice on the Rubicon. While limping him out came across two others that had had it happen in the past and then early this summer a co-workers boyfriend had the same happen on the Rubicon. All stock mounts ripped right off the frame. Could also have something to do with the type of wheeling. I never had an issue with the TJ I had but it was also a little 4 banger on 33's that never really left the pavement.
Sounds like it's isolated occurrence instead of notorious, likely caused by improper trackbar lengths or poorly setup suspension.
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post #9 of 40 Old 08-16-2019, 05:37 AM
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Sounds like it's isolated occurrence instead of notorious, likely caused by improper trackbar lengths or poorly setup suspension.
Its definitly a pretty common thing. It is isolated to wheelers but its common among them especially if you really wheel your rig. I have heard about it many times and seem it happen myself about 6 times

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. It started with a $200 axle, and a few thousand dollars later I was done :)
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diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

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this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #10 of 40 Old 08-16-2019, 05:58 AM
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I know of many TJ owners including myself that wheel their rigs hard with no issues with trackbars. Like I said before, it sounds like improper suspension setup to me. That's just my opinion as I know nothing about what others that have suffered from that have done.
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post #11 of 40 Old 08-16-2019, 10:08 AM
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If you buy a TJ frame, you also buy a lot of cutting, welding, and work to get it to fit. Your best bet if you want to "save" the YJ, is to do exactly what others have said, buy a clean YJ frame and perform the swap. A swap like this gives you an excellent opportunity to put every nut and bolt, bushing, body panel, and wiring issue back together as a fresh rebuild. While a TJ frame would simply be an opportunity to relocate body mounts, buy various miscellaneous parts like skid plates and drive shafts, etc. while you try and figure out how to set the body on the frame.

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post #12 of 40 Old 08-16-2019, 10:19 AM
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Looks like he didnt like what he was hearing and dissapeared. Hope he loves his Momma enough to do this right.

1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

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Originally Posted by Magnum View Post
I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim
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. It started with a $200 axle, and a few thousand dollars later I was done :)
Quote:
Originally Posted by Luuca View Post
diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...
Quote:
Originally Posted by Overhead View Post
this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #13 of 40 Old 08-16-2019, 12:02 PM Thread Starter
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[QUOTE=Ravenbar;40708445]Why go with a TJ frame? You can source a used YJ frame or there are comapnies making new frames as well. One offers a hot dip galvanizing option with 10 year rust warranty. If going to a TJ frame, you'd either have to also go to TJ axles/suspension(coil springs/control arms), or else adapt YJ(leaf springs) suspension to a TJ frame.[/QUOTE

Me and my dad want to swap to the coil spring setup since it is and will be primarily a pavement princess until I inherit it. I have read a couple forums doing a TJ frame swap wasn't very difficult. I thought the tubs lined up? It needs some tub patches on the sides and new front fenders due to rust. It is a hard-to-find Sahara that we all would like to save.

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post #14 of 40 Old 08-16-2019, 12:05 PM Thread Starter
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Looks like he didnt like what he was hearing and dissapeared. Hope he loves his Momma enough to do this right.
Sorry about the delay, had a lot going on. I need to make room for it in the shop, I have a cousins ranger on the lift right now waiting on a transmission

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post #15 of 40 Old 08-16-2019, 01:21 PM
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Why go with a TJ frame? You can source a used YJ frame or there are comapnies making new frames as well. One offers a hot dip galvanizing option with 10 year rust warranty. If going to a TJ frame, you'd either have to also go to TJ axles/suspension(coil springs/control arms), or else adapt YJ(leaf springs) suspension to a TJ frame.
Me and my dad want to swap to the coil spring setup since it is and will be primarily a pavement princess until I inherit it. I have read a couple forums doing a TJ frame swap wasn't very difficult. I thought the tubs lined up? It needs some tub patches on the sides and new front fenders due to rust. It is a hard-to-find Sahara that we all would like to save.
You would be better off buying a TJ that's not a rust bucket...
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