Deaver K37 vs U748. Pros and cons ?

I have my Toytecs on the middle setting. I think they're awesome, got me the lift I wanted, and I think the new bushings helped improve the ride, but I'm also looking at going with some Deaver U748. I asked MCM Fab if I could run the Deavers with the Toytecs and still stay at about 1-1.5" lift where I'm at now. He said that would be possible if I set the Toytecs at the lowest setting, but I'm pretty sure there's not enough room above the shackle to do this. I already had to trim one of the bolts sticking down above the shackle. According to Toytec, they can only be used at the middle and top settings with Tundras. I'll probably end up having to use whatever shackle MCM sells with the Deavers (and a set of Deaver spec'd ADS bypasses ).

 

Same

 

That is my concern with the Toytec shackles as well. I read a post somewhere on this forum where someone was complaining of a squeaking noise from the bed of their truck after installing the Toytec shackles on the middle setting. He finally tracked it down to the top of the shackle rubbing against a bolt head. Based on his experience I don't think they'll work for me on the lowest setting.

I shouldn't have gone on the top setting but wanted to see what it would look like - it ended up flattening my leaf springs very quickly. I'm also considering getting a refresher leaf and trying to add 1-1.5" and would just go back to the factory shackles. Either way would be fine. I don't tow often and when I do it's ~3500lbs.

 

Mind if I piggy back your question? I’m also experiencing your pains

 

Not at all - hopefully we can figure it out. It's not critical but probably the next project I will tackle on the truck. I see my bed bouncing around like crazy and it feels like crap because of the flat springs.. Particularly on concrete highway - the change from slab to slab feels like I'm driving over millions of speedbumps. Is yours the same?

 

I think I read the same post about the squeaking. I'm not sure if I had any squeaking, but there was definitely a little contact between the bolt and shackle.

Don't worry too much about flattening your springs on the top setting. Mine are flat now on the middle setting. I rarely tow, but I do have a shell on 365 days a year that adds 200-300 lbs. @M C M suggested the U748 over the K37.

 

Yes, and I’ve already swapped to a second set of OEM springs with an AAL

 

I don’t have a topper by I do have 350+ atalltimrs

 

There's a "yo momma" joke wandering around here somewhere..

I'll be adding a bed rack eventually as well. Interestingly my ride is much nicer right now with 200-300lbs in the bed..

 

I just realized I've queued up another "yo momma" joke..

 

U748 are designed to handle extra weight better and ride nice.

Then you want the U748 also. I have that setup works great.

 

I sense a Deaver + ADS shock group buy in the future!

 

Yep
I was already saving my pennies

 

If you pull it off I’m first on the list

 

You won' regret it!!

 

The RTT And rack vs MOAB is what has killed mine

 

That’s what I keep hearing

 

Yo momma would be proud if you got some Deavers

 

@Backslider , @Almaboy and @TundraUTAH sounds like you guys all need the U748 ADS setup will work perfect for what you guys described. I went with it for when loaded with gear, dirtbikes or the occsional tow.

 

@M C M
How many do we need for Group Buy?

 

I'm in for the Deaver spec ADS bypass if group buy...love my K37s and MCM shackles. Great service from @M C M as well

 

MCM or Total Chaos shackles. A lot beefier that stock ones but still get 3/4 to 1". Best of both world imo.

 

Is there any difference in lift height between the Deaver K37 and U748?

 

My best guess from my recent buying experience is - no they are the same ride height unloaded. The extra ride height is tied to the extra length of the shackle.

 

Don’t want to derail this fun. But heseva pic of my 6 month old OME pack on stock shackles the right side looks like this and my left side looks a bit better but looks like it lost its arch

 

Look at the rear part of the pack behind the wheel

 

same lift height.

 

I'd be down too for some u748's

 

I know this is an older thread, but I wanted to give a shout-out to Matt MCM for his excellent support and knowledge with ADS and Deavers.

2.5in ADS Resi Clickers in front (700lb spring) with MCM UCA
2.5in ADS Bypass in back with extended travel to match to a set of Deaver U748 springs

Took them out into the dirt (unloaded) and they were still in a whole different league than the stock setup I had before. Definitely not overly stiff.