View Full Version : Monroe struts on DeVille - My impressions


Mark G
08-28-04, 04:45 PM
I'm providing this information for all those considering this upgrade. The following are my impressions of this upgrade:

Overview:
I installed Monroe struts on my 93 Deville about 4 months ago to replace the original solonoid-operated units that were shot. BTW, the originals did pretty well as the car has 193,000 on it. The car would bottom out a lot and had that "float" attitude. But ultimately a rubber bladder on one of the rear shocks (load leveling system) rotted out and wouldn't hold air. The air compressor would run quite a bit (not full time), so it was time to do something.

Which Struts To Buy?
I was unsure on which way to go for replacements. I checked out the internet options, but I ended up going with the Monroe lower-end replacement struts for this car. They also have a higher end shock for about $20 more each. The biggest concern was should I go with the better shocks which were supposed to be firmer, or get the standard "original ride" replacements? Like I said, I settled on the 'original ride' replacements. The struts I bought cost around $45 ea from Northern Automotive Warehouse (Great place - do a Yahoo search). The rear struts DO have the air leveling feature just like the originals, which I really wanted since we DO sometimes load down the trunk. The rears were a few bucks more expensive than the fronts. I think all 4 struts came in around $225 or less with shipping.

Installation:
I installed the struts myself, more because I had a bunch of other things I needed to do (water pump, timing cover, oil pan, etc). I have a good mechanical background and all the tools for this kind of installation. But you wouldn't need any fancy tools other than a jack/jackstands and hand tools to do this job. An air impact wrench is truely a good tool for this job as the bolts can be very tough to remove after all the years. Basically the hardest part of the job was getting the old struts out, but that was more of a issue with my cheap Harbor Freight spring compressor. Once out, I compressed the spring more, removed the retaining plate and switched it over to the Monroes, then installed them. I always chain the spring to the strut and wear a face shield (not that it would really help), but it's good to use caution.

I also checked my ball joints. At 190,000+ miles they were still fine, so I left them alone. I purchased new ball joints ahead of time figuring to replace them, but they checked out fine ahead of time and were still snug in their sockets (I grease regularly), so why bother? Car has mostly highway miles on it.

The rear struts were a piece of cake to remove since there are no springs on them. I had the car up on jack stands and chained the coil spring to the suspension and just lowered the lower control arm with a jack till the spring was loose. The shocks came right out. I stuck the new ones in and hooked up the air line. I "eye-balled" the strut alignment on all shocks before putting everything back together, then took it in for an alignment. They only had to adjust the tow. I also had them double-check the ball joints and yeah, they said they were all tight.

Results:
As far as performance goes, it is a TREMENDOUS improment! The "Original" ride Monroe shocks don't seem to be rougher riding than the originals, but it's hard to judge because mine were so worn out. It doesn't bottom out any more or "float" as I drive. I wish I had done the conversion a year or two earlier. It's been a joy to drive. I don't miss the original active suspension. Personally I thought it was kind of a joke because of the way it was set up. It would switch to "firm" around 67 mph and stay at that position until ya get down to like 58 or 62. That meant that tooling on the interstate at 68 or 70 I would get a ride that was too firm for my tastes. The new rear load leveling work as they should and I can haul loads around again now.

Well, that's it. These are my experiences. Hope this helps others.

Mark G

Stoneage_Caddy
08-29-04, 11:54 AM
i havent looked into the monroe option yet , sounds a little more cost effective

N0DIH
08-30-04, 03:12 PM
Has anyone used the KYB struts? I am considering either the electronic struts (and run a toggle switch, as I don't have the CCR), or the KYB's. They are pricey around $125 each the last time I checked. My guess is the CCR struts will be my choice, as I get the determine the ride if needed. Corvette did it with a switch, why can't I? Maybe I will hide it in the heated front windshield switch (which is an option I don't have, but it would disquise it nicely)

I do want a firmer ride. The car is pretty mushy in my book.

With my 91 Bonneville, I cut 1 full coil off the front in effort to get the ride hieght to what I feel is stock. My Cadillac is pretty high in the front too, been thinking of cutting.... The back has been down some, so I adjusted the load level switch and it finally rides level. My guess is rear struts are blown, the car bounces waaaay too much over bumps.

My goal is to get the car to the ride hieght in the GM photo's. They always seem to have them lowered for them. And most front driver cars seem to have the front springs stretched out too much over time (probably by the sagging rear shocks/struts).

N@P@ has the $58 and 58, front and rear respectively for a CCR car. Not cheap by any means. I guess maybe I will work on finding a CCR box in a boneyard and see if I can retrofit it (it sits under the drvers seat)

Tom

rlb827
08-30-04, 09:57 PM
I can't find this Northern Automotive Warehouse on the Yahoo search. If you could post the direct site, I would be appreciated. I have a '97 STS that needs some front and rear suspension work and would like to try to avoid the thousands of dollars I've been quoted at.

I've looked into Boston, strutmasters, etc. and still believe that there is an alternate, easier, cheaper way to do this by going straight to Monroe but I can't find that way. Little help would be great.

Mark G
08-30-04, 10:26 PM
Norther Auto Parts site: http://www.naparts.com/

They are in Sioux City, IA. I've been buying from them for at least 17 years, and know a handful of rodders that have been long-time customers. They sell a lot of engine rebuild kits & suspension parts to street rodders and rebuilders. Whenever I get super high prices from the local Napa's on like suspension, brake electrical or other parts, I give Northern a call. They are almost always WAY cheaper. They don't sell crappy quality parts either, in my experience. They'll have it to me in a couple days. Returns are not a problem. I've never really browsed their site. I get their quarterly catalog, but truthfully, best thing is to just call one of their helpful parts guys, they have a lot more than they list in their catalog. Definitely recommend them. Good luck

Mark G

AElayyat
08-31-04, 02:25 AM
I'm providing this information for all those considering this upgrade. The following are my impressions of this upgrade:

Overview:
I installed Monroe struts on my 93 Deville about 4 months ago to replace the original solonoid-operated units that were shot. BTW, the originals did pretty well as the car has 193,000 on it. The car would bottom out a lot and had that "float" attitude. But ultimately a rubber bladder on one of the rear shocks (load leveling system) rotted out and wouldn't hold air. The air compressor would run quite a bit (not full time), so it was time to do something.

Which Struts To Buy?
I was unsure on which way to go for replacements. I checked out the internet options, but I ended up going with the Monroe lower-end replacement struts for this car. They also have a higher end shock for about $20 more each. The biggest concern was should I go with the better shocks which were supposed to be firmer, or get the standard "original ride" replacements? Like I said, I settled on the 'original ride' replacements. The struts I bought cost around $45 ea from Northern Automotive Warehouse (Great place - do a Yahoo search). The rear struts DO have the air leveling feature just like the originals, which I really wanted since we DO sometimes load down the trunk. The rears were a few bucks more expensive than the fronts. I think all 4 struts came in around $225 or less with shipping.

Installation:
I installed the struts myself, more because I had a bunch of other things I needed to do (water pump, timing cover, oil pan, etc). I have a good mechanical background and all the tools for this kind of installation. But you wouldn't need any fancy tools other than a jack/jackstands and hand tools to do this job. An air impact wrench is truely a good tool for this job as the bolts can be very tough to remove after all the years. Basically the hardest part of the job was getting the old struts out, but that was more of a issue with my cheap Harbor Freight spring compressor. Once out, I compressed the spring more, removed the retaining plate and switched it over to the Monroes, then installed them. I always chain the spring to the strut and wear a face shield (not that it would really help), but it's good to use caution.

I also checked my ball joints. At 190,000+ miles they were still fine, so I left them alone. I purchased new ball joints ahead of time figuring to replace them, but they checked out fine ahead of time and were still snug in their sockets (I grease regularly), so why bother? Car has mostly highway miles on it.

The rear struts were a piece of cake to remove since there are no springs on them. I had the car up on jack stands and chained the coil spring to the suspension and just lowered the lower control arm with a jack till the spring was loose. The shocks came right out. I stuck the new ones in and hooked up the air line. I "eye-balled" the strut alignment on all shocks before putting everything back together, then took it in for an alignment. They only had to adjust the tow. I also had them double-check the ball joints and yeah, they said they were all tight.

Results:
As far as performance goes, it is a TREMENDOUS improment! The "Original" ride Monroe shocks don't seem to be rougher riding than the originals, but it's hard to judge because mine were so worn out. It doesn't bottom out any more or "float" as I drive. I wish I had done the conversion a year or two earlier. It's been a joy to drive. I don't miss the original active suspension. Personally I thought it was kind of a joke because of the way it was set up. It would switch to "firm" around 67 mph and stay at that position until ya get down to like 58 or 62. That meant that tooling on the interstate at 68 or 70 I would get a ride that was too firm for my tastes. The new rear load leveling work as they should and I can haul loads around again now.

Well, that's it. These are my experiences. Hope this helps others.

Mark G

Mark, that is some very helpful info on the Monroe shocks for the deville. I did the same job you did on your deville 1 year ago on my (at the time my dad's car) 89 sedan deville. And yeah those shocks do ride very smooth with the addition of good handling. By the way When I replaced the original shocks they had about 280,000 miles on them.

SoundAdvantage
09-06-04, 10:03 PM
MARK G
Thanks for the info on the Monroe Struts. I am getting ready to have a new set of tires put on my deville and because i wanted to keep the ride as close to original as possible, the guy at the tire store also recommended i go with the Monroe brand struts. So i was glad to see your post that confirms my expectations. :)

stebob
09-08-04, 04:17 PM
I'm needing to do the same thing on my wife's '91 Seville. Is it the same set-up? Would I use the exact same struts as you did? Would you mind giving me the part # for front and rear that you used? I would also like to keep the air suspension in the rear.

Thanks for any info.! Kind of a Caddy newbie here.

FLSurf420
09-10-04, 08:53 PM
i have a 91 deville sedan without the auto leveling... what struts would i need for both the front and the back? because i also get bottoming out and that "float" feeling

Mark G
09-13-04, 10:36 PM
SteBob, I really don't know what the part numbers of the struts are. They are the lower-priced Monroe's, the "Monroe-matics". If you contact Napa or the parts place I left a link for (above) they will be able to steer you in the right direction. You guys might take a journey over to Monroe's website: http://www.monroe.com . They also list other shocks for DeVilles: "Reflex" and their top of the line "Sensa-Tracs." I went with the cheapies, but I wouldn't be afraid to experiment with the others. Monroe says they have the same smooth ride but are more firm at the longer stoke positions. That might be kind of nice.

Mark G

stebob
09-14-04, 09:59 AM
Cool!! Thanks a lot, Mark! I'll check it out.