Moparts

Suspension sag question on 2wd truck

Posted By: larrymopar360

Suspension sag question on 2wd truck - 10/13/20 11:48 PM

Been looking at late 70's 2wd trucks to go with my W150. Looking at one now that sits lower on left front. Visible in photos. I don't think it's from any rot. Assuming it's not, suspension issue would be only other thing, right? Coil spring weak or broken? I guess if it were broken it would really collapse though. I don't mind if springs just need replacement, or bushings and springs, but if there's something else I need to be concerned about I'd like to know. It would bug me having it sit down lower like it does. Seems springs would wear fairly evenly. I just want to make sure it's something correctable.

Thanks,

Larry
Posted By: geo.

Re: Suspension sag question on 2wd truck - 10/14/20 01:41 AM

I bought an '89 D250 about ten years ago, was told it had a broken spring on one side.

bought it anyway, Both front springs were broken! Not too expensive to replace, didn't need to break the ball joints loose, or use a spring compressor.

Just unbolt the lower A frame and strut rod, old spring falls out new one goes in with jack under the arm.

Of course you should check for cracks around the steering box while you're in there.

Posted By: Sniper

Re: Suspension sag question on 2wd truck - 10/14/20 01:50 AM

Low tire pressure can do that too.
Posted By: 1E2C

Re: Suspension sag question on 2wd truck - 10/14/20 02:32 AM

There was at least one TSB (IIRC) about a low left front, don't remember the exact resolution but there were parts to adjust the spring settling???
Posted By: 68_661charger

Re: Suspension sag question on 2wd truck - 10/14/20 12:00 PM

I've always wondered if you could stick a thicker round insulator pad on top of the drivers spring to fix this? Maybe use a new one on drivers side and a used on passenger side? Do they even sell those rings anymore?
Posted By: SattyNoCar

Re: Suspension sag question on 2wd truck - 10/14/20 12:38 PM


While I don't have a fix for it, from what I have read, its pretty common especially now that the trucks are old. Those trucks had quite a bit of weight all on the left side, the battery, the driver, the fuel tank...etc, etc.
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 03:22 PM

Originally Posted by 68_661charger
I've always wondered if you could stick a thicker round insulator pad on top of the drivers spring to fix this? Maybe use a new one on drivers side and a used on passenger side? Do they even sell those rings anymore?
LMC truck has everything. I've checked their site for parts. This sag would drive me nuts if it's normal. My W150 doesn't have it. No fuel tank over there anymore. Seems like the fuel tank is far enough back that it wouldn't isolate it to just the front
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 03:26 PM

Originally Posted by 1E2C
There was at least one TSB (IIRC) about a low left front, don't remember the exact resolution but there were parts to adjust the spring settling???
I'll try and find this. I'm too OCD to deal with one side noticably lower
Posted By: iapco103

Re: Suspension sag question on 2wd truck - 10/14/20 03:51 PM

Been there , done that with my 86 D150. The problem started on the assembly line with a mixed bag of l/h lower control arms.

It seems that some 1 Ton control arms made their way into the 1/2 Ton control arms. The 1 Ton control arms have a deeper spring pocket, henceforth the noticeable sag on the lefthand side.

The fix is whats called a " correction rubber ", which is a thick piece of rubber to fit the top of the coil spring. Works like a charm. Don't know if it is still available.

There is/was a company making them out of aluminum, can't recall the name at the moment. Paul
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 03:56 PM

Originally Posted by iapco103
Been there , done that with my 86 D150. The problem started on the assembly line with a mixed bag of l/h lower control arms.

It seems that some 1 Ton control arms made their way into the 1/2 Ton control arms. The 1 Ton control arms have a deeper spring pocket, henceforth the noticeable sag on the lefthand side.

The fix is whats called a " correction rubber ", which is a thick piece of rubber to fit the top of the coil spring. Works like a charm. Don't know if it is still available.

There is/was a company making them out of aluminum, can't recall the name at the moment. Paul
Thank you Paul! Wonder if that's something that could be made relatively easily?

Here's a pic of truck, no driver inside. Pretty significant lean! Would drive me nuts!

Attached picture s-l1600 (2).jpg
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 04:02 PM

I just did a search, "D150 correction rubber" lol. Not much of a keyword but best I could do right now. Found nothing. I've already been searching other terms for two days and found nothing. It's enough to make me pass on this truck.
Posted By: stumpy

Re: Suspension sag question on 2wd truck - 10/14/20 04:58 PM

How about something like this? https://www.amazon.com/s?k=coil+spring+spacer
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 04:58 PM

I see so many that don't, so it does seem more likely it's something in manufacturing to me. Other than the fuel tank, which is pretty far back, most cars are set up the same, with battery, steering box, etc. on that side.

Here's another I came across not leaning.

Attached picture 00K0K_7aQ3wAFDtsS_0CI0t2_1200x900 (1).jpg
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 05:01 PM

Interesting. The fitment beginning in '94 worries me because that was the total redesign so I wonder if the diameter of the coils are too different.
Posted By: stumpy

Re: Suspension sag question on 2wd truck - 10/14/20 05:03 PM

Just an idea of what to search for. spring spacers. Sometimes you need to expand your search options and be less specific.
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 05:13 PM

Originally Posted by stumpy
Just an idea of what to search for. spring spacers. Sometimes you need to expand your search options and be less specific.
up
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 05:15 PM

More without sag. And I see so many LRE's no sagging.

I won't drag this on and on. Like I wrote, I think I'm going to let this truck go, because if I couldn't correct the sag, my OCD would drive me nuts. If I were sure a full front end rebuild, even if I had to replace UCA arms, would fix it, I'd still be considering pulling the trigger on it.

Attached picture 00X0X_jXUjlkjN2Qw_0CI0t2_1200x900.jpg
Posted By: Grizzly

Re: Suspension sag question on 2wd truck - 10/14/20 05:19 PM

It's called the "Dodge Lean".

Unfortunately, diesel, V10, V8 or slant six, they do it. More common in 2wd's. Surprisingly, My 4wd with the stiffer Off-Road springs did it. work The '01 4wd beater I picked up 2 years ago is now doing it, my Parents' new '90 2wd Diesel did it, and my '90 2wd gas was just starting to do it when I sold it. Seems to always be the driver side.

It doesn't take much, a quarter inch on one side is noticeable a mile away. I put diesel springs in my Off-Road and that fixed it, otherwise I know of no other fix except to buy new springs. Dodge's spring supplier were not doing their job right, that's for sure. down Maybe the new trucks are better.
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 08:20 PM

Grizzly, I don't mind replacing the springs if that fixes it.
Posted By: geo.

Re: Suspension sag question on 2wd truck - 10/14/20 09:47 PM

What if the right rear leaf was raising that corner which would make the left front look lower, or right rear had sagged more than left rear.
Im sure circle track folks tune their cars this way.
I bet you could install a lowering block on the left rear to raise that side which would pick up the front too.
Posted By: iapco103

Re: Suspension sag question on 2wd truck - 10/14/20 09:52 PM

The only thing that will fix this lean is to shim the l/h coil spring, ask me how I know. I got the correction rubber from the dealer, but that was 15 years ago, they probably don't sell them anymore.
You would have to find a really old school mopar parts guy to help you. There was an aftermarket company making a tapered aluminum version, but their website is near impossible to find on general internet search.

This is a fixable thing , so don't give up. Paul
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 10:18 PM

Originally Posted by geo.
What if the right rear leaf was raising that corner which would make the left front look lower, or right rear had sagged more than left rear.
Im sure circle track folks tune their cars this way.
I bet you could install a lowering block on the left rear to raise that side which would pick up the front too.
I looked through all the pics and the rear seems fine.
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 10:19 PM

Originally Posted by iapco103
The only thing that will fix this lean is to shim the l/h coil spring, ask me how I know. I got the correction rubber from the dealer, but that was 15 years ago, they probably don't sell them anymore.
You would have to find a really old school mopar parts guy to help you. There was an aftermarket company making a tapered aluminum version, but their website is near impossible to find on general internet search.

This is a fixable thing , so don't give up. Paul

I'm going to keep looking. Thanks!
Posted By: Ply72rr

Re: Suspension sag question on 2wd truck - 10/14/20 10:36 PM

Dodge Truck coil spring spacers https://www.ebay.com/i/261897223771...kJg0IabsE4gAP5J-gEHwp57pudBoCPsQQAvD_BwE


https://www.ebay.com/i/122468701295?rt=nc&_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D2%26asc%3D20160908110712%26meid%3D363024c180e54f5fb0563e256b662934%26pid%3D100677%26rk%3D15%26rkt%3D30%26mehot%3Dnone%26sd%3D261897223771%26itm%3D122468701295%26pmt%3D1%26noa%3D1%26pg%3D2386202%26algv%3DDefaultOrganic%26brand%3DCustom
Posted By: larrymopar360

Re: Suspension sag question on 2wd truck - 10/14/20 11:13 PM

Originally Posted by Ply72rr
Dodge Truck coil spring spacers https://www.ebay.com/i/261897223771...kJg0IabsE4gAP5J-gEHwp57pudBoCPsQQAvD_BwE


https://www.ebay.com/i/122468701295?rt=nc&_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D2%26asc%3D20160908110712%26meid%3D363024c180e54f5fb0563e256b662934%26pid%3D100677%26rk%3D15%26rkt%3D30%26mehot%3Dnone%26sd%3D261897223771%26itm%3D122468701295%26pmt%3D1%26noa%3D1%26pg%3D2386202%26algv%3DDefaultOrganic%26brand%3DCustom


You thinking possibly place on one side only?

I just bought a set lol. I don't even have a D150 yet! I figure for less than $40 I'll hang onto them. If I don't use them in the next 5 years I'll sell them.
Posted By: iapco103

Re: Suspension sag question on 2wd truck - 10/15/20 02:29 AM

OK , I found the p/n 4322629 coil spring spacer. AMS Obsolete shows to have them in stock , don't know the price. You will only need one for the top of the l/h spring. Paul
Posted By: geo.

Re: Suspension sag question on 2wd truck - 10/15/20 03:05 AM

Originally Posted by larrymopar360
Originally Posted by geo.
What if the right rear leaf was raising that corner which would make the left front look lower, or right rear had sagged more than left rear.
Im sure circle track folks tune their cars this way.
I bet you could install a lowering block on the left rear to raise that side which would pick up the front too.
I looked through all the pics and the rear seems fine.


So did you measure the height when you were looking at it?

Just realized this is two pages about a truck that the OP hasn't seen in person.
I'll be more careful next time.
© 2024 Moparts Forums