Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Modified FSJ Tech Area

Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Mon May 17, 2021 8:34 am

I was told my 77 Cherokee WT had a 4” lift kit from the company Superlift. The front is all leafs (marked Superlift on leafs) but the rear uses a block and what I think is Superlift’s overload leaf. I called Superlift and they had little information about the kit because of its age.

I just want to replace the rear with an all leaf spring setup but unsure of which leaf springs to get(in regards to how many inches). After taking some measurements, it looks like the rear currently uses the stock leaf springs, an aftermarket overload leaf (possibly Superlift’s) and a block that sits on the perch.

If I want to order an all leaf spring setup, which leaf springs do I need? How many inches? Am I over thinking this? Again, the claim was that this is a 4” lift kit.

I’ve added measurements in the pics. Just to be clear all these pics are of the rear as I just want to replace the rear leaf springs. Any help would be greatly appreciated.
Image
Image
Image
Image
Image
Last edited by 77Chief77 on Thu Jun 10, 2021 12:58 pm, edited 3 times in total.
1977 Chief, Wide Track, 360, TH400, QT


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Mon May 17, 2021 8:59 am

More pics of the rear leafs. They look like they could be factory but the bottom overload leaf looks newer.
Image
Image
Image
Image
You do not have the required permissions to view the files attached to this post.
Last edited by 77Chief77 on Tue May 18, 2021 10:46 am, edited 1 time in total.
1977 Chief, Wide Track, 360, TH400, QT

User avatar

Stuka
Site Admin
Posts: 10524
Joined: Thu May 12, 2011 5:53 pm
Location: Sonora, CA
Contact:

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by Stuka » Tue May 18, 2021 10:19 am

Best to not measure from the tire to fender, as every tire is different. Best to measure from the top of the axle to the frame on both sides, and then average them (incase you aren't on perfectly flat ground). That way tire size and body mount condition/body lift doesnt impact measurements.

For the lift block, measure the front also, in case its tapered for pinion angle.

It looks like you have stock rear springs, with a 2" block, and an add-a-leaf. So you may be looking at more like 3-3.5 inches of total lift. But thats hard to say because the current state of sag on those springs is unknown.

If you are wanting to replace the entire lift for a better ride ditch the blocks, there are several better lift kits out there. And a 4" should be close to what you have now.
2017 JKU Rubicon Lifted and stuff
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Tue May 18, 2021 10:54 am

I edited my original posts to clean up the pics. I also wanted to close the loop on this thread to help another leaf spring newb.
Thanks for the reply and the text line at BJ’s said the same pretty much. I’m at 12 3/4” so looks like I’ll need 4” leaf springs.
Image
You do not have the required permissions to view the files attached to this post.
1977 Chief, Wide Track, 360, TH400, QT


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Tue May 18, 2021 11:16 am

Anyone know which leaf springs are best for having good road manners, comfort and best for daily driving? BJ's sells 3 options in 4" lift leaf springs. BDS, Skyjacker and BJ's
1977 Chief, Wide Track, 360, TH400, QT

User avatar

Stuka
Site Admin
Posts: 10524
Joined: Thu May 12, 2011 5:53 pm
Location: Sonora, CA
Contact:

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by Stuka » Tue May 18, 2021 2:16 pm

Skyjacker is known for having a nice ride. They are also a bit taller than some other 4" kits. Many are listed as 3-4" kits, the skyjacker is more of a 4-5" kit.

BDS has a pretty good reputation, although I have not used their stuff personally. I am not sure who BJs is using currently, they have had a few different manufacturers over the years. I would stay far away from Rough Country though, they live up to their name.
2017 JKU Rubicon Lifted and stuff
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Tue May 18, 2021 8:51 pm

BJ’s uses Deaver Spring out of Santa Ana. I’ve always heard good things from Deaver. I’ll most likely order those with their heavy duty shackles. It’s going to be nice having fresh new tight components out back.
1977 Chief, Wide Track, 360, TH400, QT

User avatar

Stuka
Site Admin
Posts: 10524
Joined: Thu May 12, 2011 5:53 pm
Location: Sonora, CA
Contact:

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by Stuka » Wed May 19, 2021 5:49 am

Just don’t go with longer than stock shackles up front. They mess with the alignment and will make the steering floaty
2017 JKU Rubicon Lifted and stuff
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

User avatar

tgreese
Posts: 4732
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by tgreese » Wed May 19, 2021 6:06 am

The BDS lift kit is very popular for CJs. They are one of the few offerings for the 1.75" wide springs used on the pre-76 CJs. My CJ-6 has BDS 2.5" lift springs. Ride good, fit well, give the lift they advertise. They stand behind their no-BS guarantee.

The parts book shows a 5-leaf rear spring rear spring for a 1977 model 17. These are supplied in both light and heavy, though heavy appears to be export only. There is only one GVWR of 6025 for all model 10s in 1977. The 4-leaf springs look original to me. Possible there was a single overload leaf previously that was removed to fit the aftermarket overload leaf.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 FCA Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Wed May 19, 2021 7:41 am

I'm definitely sticking with the stock height shackles but I'll probably go with the heavy duty BJ versions.
https://www.bjsoffroad.com/-Shackles-He ... _2131.html

Good call on the 5th leaf removal to add the thick overload leaf.

Thanks for chiming in fellas.
1977 Chief, Wide Track, 360, TH400, QT


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Wed May 19, 2021 7:46 am

Here’s the parts list so far. Hopefully it all fits together and all plug and play. Again I’m just doing the rears because the front all-leaf spring pack and poly bushings still look great.

Image
You do not have the required permissions to view the files attached to this post.
1977 Chief, Wide Track, 360, TH400, QT

User avatar

Stuka
Site Admin
Posts: 10524
Joined: Thu May 12, 2011 5:53 pm
Location: Sonora, CA
Contact:

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by Stuka » Wed May 19, 2021 3:02 pm

Cool, will be interested how they compare height wise. Hopefully they are close enough to not notice.
2017 JKU Rubicon Lifted and stuff
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Wed May 19, 2021 7:33 pm

I think worst case is I getting the matching front springs if it’s not close enough.
1977 Chief, Wide Track, 360, TH400, QT


Cheapthrills
Posts: 633
Joined: Wed Nov 02, 2016 7:09 am
Location: Sedalia colorado

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by Cheapthrills » Wed May 19, 2021 11:31 pm

77Chief77 wrote:I was told my 77 Cherokee WT had a 4” lift kit from the company Superlift. The front is all leafs (marked Superlift on leafs) but the rear uses a block and what I think is Superlift’s overload leaf. I called Superlift and they had little information about the kit because of its age.

I just want to replace the rear with an all leaf spring setup but unsure of which leaf springs to get(in regards to how many inches). After taking some measurements, it looks like the rear currently uses the stock leaf springs, an aftermarket overload leaf (possibly Superlift’s) and a block that sits on the perch.

If I want to order an all leaf spring setup, which leaf springs do I need? How many inches? Am I over thinking this? Again, the claim was that this is a 4” lift kit.

I’ve added measurements in the pics. Just to be clear all these pics are of the rear as I just want to replace the rear leaf springs. Any help would be greatly appreciated.
Image
Image
Image
Image
Image
Measuring lift i always go to center of hub to bottum of fender opening.

Sent from my SM-N960U using Tapatalk



Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Tue May 25, 2021 6:42 am

I’m prepping for the rear leaf spring swap.
Do these torque numbers look right?
What are the Center Bolt torque specs?

Image

Where I got these torque specs for my 77 Chero:

Image
You do not have the required permissions to view the files attached to this post.
1977 Chief, Wide Track, 360, TH400, QT

User avatar

tgreese
Posts: 4732
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by tgreese » Tue May 25, 2021 8:53 am

Re the center bolt, I have never looked for a spec. They hold the spring together until the clips are in place, and don't do anything other than align the pocket with the bolt head. The force from the clips in service is massive. I'd say good and tight with your ratchet.

Numbers for the clips looks right. I would not argue with the TSM. If that's not the TSM, the '77 TSM is online at the Tom Collins site. Check them after 100 miles or so.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 FCA Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.

User avatar

Stuka
Site Admin
Posts: 10524
Joined: Thu May 12, 2011 5:53 pm
Location: Sonora, CA
Contact:

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by Stuka » Tue May 25, 2021 10:06 am

If you have new springs, you should not need to touch that center pin, its installed by the spring manufacturer.
2017 JKU Rubicon Lifted and stuff
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

User avatar

tgreese
Posts: 4732
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by tgreese » Tue May 25, 2021 11:31 am

I did not think of the spring packs being assembled, since you routinely need to add caster shims on CJs. My CJ-6 has caster shims and I used a new center bolt to install them. You won't need to do this on a rear axle unless you tilt the pinion up with tapered shims to adjust the driveshaft angles.

Also, your illustration shows the center bolt nut on the opposite side of the "tie plate," capturing the plate to the spring. In practice, this does not happen. The hole diameter clears the center bolt nut and the parts remain separate.

Seems that's from the TSM, and misleading. The parts book shows it correctly.

Image
You do not have the required permissions to view the files attached to this post.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 FCA Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.


Topic author
77Chief77
Posts: 90
Joined: Fri Mar 20, 2020 4:18 pm

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by 77Chief77 » Tue May 25, 2021 3:28 pm

Thanks for chiming in fellas.
Yes, I got the specs and pics from Tom Collin's site.
In regards to the center bolt, I forgot it comes assembled (this is why I double check everything with you guys).
Yes, that is interesting that the illustration from the Tim Collin's site site shows the center bolt nut capturing the tie plate. That is misleading. This is where I got the illustration - https://oljeep.com/gw/77_tsm/16%201977% ... ension.pdf

Anyone know why they call it a U-bolt clip? I feel like they could leave the word "clip" out and just go with u-bolt haha
1977 Chief, Wide Track, 360, TH400, QT

User avatar

tgreese
Posts: 4732
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Are these OE rear leaf springs? Am I measuring lift height correctly? PICS

Post by tgreese » Tue May 25, 2021 3:52 pm

Dunno. Jeep sometimes uses their own names. "CTO" comes to mind. I try to conform to their naming to avoid confusion. "A rose by any other name ..."
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 FCA Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.

Post Reply

Who is online

Users browsing this forum: Google Adsense [Bot], Tio Pancho and 3 guests