Rear shackle on 05 Tacoma
10-03-2006, 04:40 PM
#3
Contributing Member
Thread Starter
Join Date: Feb 2004
Posts: 2,518
Likes: 0
Received 0 Likes
on
0 Posts
10-03-2006, 05:30 PM
#5
Contributing Member
iTrader: (1)
Join Date: Apr 2005
Location: Colorado
Posts: 4,683
Likes: 0
Received 0 Likes
on
0 Posts
all i know is thats the gayest shackle contraption i've ever seen. I don't think moving that bracket down would be the safest thing to do...it could cause leafs to break or the mount to crack/bend. I know it's pricey but if it was mine, new leaf packs would be my only option...
10-03-2006, 05:41 PM
#6
Contributing Member
Thread Starter
Join Date: Feb 2004
Posts: 2,518
Likes: 0
Received 0 Likes
on
0 Posts
all i know is thats the gayest shackle contraption i've ever seen. I don't think moving that bracket down would be the safest thing to do...it could cause leafs to break or the mount to crack/bend. I know it's pricey but if it was mine, new leaf packs would be my only option...
10-03-2006, 06:22 PM
#7
Contributing Member
Ok, just so you know, this is shooting from the hip so It *could* be wrong. 
I might do a little calculation later to prove my theory.
Looking at the design, I think the point of the design is to maximize the spring rate of the leaf springs being used.
For a tension shackle, the spring's apparent spring rate will increase as the spring compresses, approaching a maximum value either when the spring is totally flat (or as flat as it can be) or the shackle is horizontal. In either case, the spring's rate INCREASES as it compresses.
For a compression shackle, the higher the angle of the shackle the LOWER the spring rate. If the shackle were to go completely horizontal (impossible with most designs) the effective spring rate would be zero. To make up for this (especially in load-carrying applications) you have to use thicker spring packs.
So, by using tension shackles on the new Tacos, Toyota has made sure they have good payload carrying ability while at the same time being able to use overall small leaf packs, to assure better ride quality. Actually come to think of it, IIRC most newer trucks (especially towing rigs) of any brand use tension shackles to help the rear springs out.
I might do a little calculation later to prove my theory.Looking at the design, I think the point of the design is to maximize the spring rate of the leaf springs being used.
For a tension shackle, the spring's apparent spring rate will increase as the spring compresses, approaching a maximum value either when the spring is totally flat (or as flat as it can be) or the shackle is horizontal. In either case, the spring's rate INCREASES as it compresses.
For a compression shackle, the higher the angle of the shackle the LOWER the spring rate. If the shackle were to go completely horizontal (impossible with most designs) the effective spring rate would be zero. To make up for this (especially in load-carrying applications) you have to use thicker spring packs.
So, by using tension shackles on the new Tacos, Toyota has made sure they have good payload carrying ability while at the same time being able to use overall small leaf packs, to assure better ride quality. Actually come to think of it, IIRC most newer trucks (especially towing rigs) of any brand use tension shackles to help the rear springs out.
Last edited by mastacox; 10-03-2006 at 06:27 PM.
Trending Topics
10-03-2006, 06:45 PM
#8
Registered User
Join Date: Dec 2002
Location: Idaho
Posts: 4,655
Likes: 0
Received 0 Likes
on
0 Posts
This is what chevy has used for years... .funny thou cuz of the big 3 they squat the most with the least weight. Check out offroad unlimited of cali for ideas on shackle filp kits, i think they call them...
10-03-2006, 06:49 PM
#9
Contributing Member
Also note:
My friend's 1971 suburban had tension shackles in the rear, when he lifted it he got a "shackle flip" which gave him about 4" of lift and converted him to compression shackles in the rear. Although shackle flips don't yet exist for '05 Tacomas, it's possible they will.
My friend's 1971 suburban had tension shackles in the rear, when he lifted it he got a "shackle flip" which gave him about 4" of lift and converted him to compression shackles in the rear. Although shackle flips don't yet exist for '05 Tacomas, it's possible they will.
10-04-2006, 04:21 AM
#10
Contributing Member
Thread Starter
Join Date: Feb 2004
Posts: 2,518
Likes: 0
Received 0 Likes
on
0 Posts
Good info good info...thanks guys!
This thing is a cadillac in the rear....makes me feel like I'm driving granny's stationwagon! Not to mention it axle hops like a mofo when you spin the tires the least bit..
This thing is a cadillac in the rear....makes me feel like I'm driving granny's stationwagon! Not to mention it axle hops like a mofo when you spin the tires the least bit..
Thread
Thread Starter
Forum
Replies
Last Post
Flying91
86-95 Trucks & 4Runners (Build-Up Section)
45
04-11-2024 04:39 PM
BeMiceElf
Misc Stuff (Vehicle Related)
7
10-10-2015 09:40 PM
WTB[PacNorWest]: WTB - Tacoma/4runner 3.4 Charcoal canister and igniter
94whiterunner
Items Wanted
0
07-12-2015 07:15 PM
FS[NorAtl]: 05+ tacoma leveling lift front MA
akaphilly
Axles - Suspensions - Tires - Wheels
0
07-09-2015 02:18 PM
