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rear dobinson shocks, need help

Posted: Sun Jul 30, 2006 2:02 pm
by felsy
does any one have dobinson rear shocks for a 2 or 3 inch lift? if so what is the part number off it,
im not getting full suspension travel, (tops out easily) just wondering if i have correct shocks

Posted: Mon Jul 31, 2006 7:13 am
by toymad80
try ringing dobinsons factory in rockhampton on (07)4927 7444 talk to ray in sales he helped me out, they build shocks to suit up to 6inch lifts.

Re: rear dobinson shocks, need help

Posted: Mon Jul 31, 2006 9:47 am
by JOHNZ
felsy wrote:does any one have dobinson rear shocks for a 2 or 3 inch lift? if so what is the part number off it,
im not getting full suspension travel, (tops out easily) just wondering if i have correct shocks
Go back to who ever you bought them from.

Posted: Mon Jul 31, 2006 1:48 pm
by RMP&O
I fitted a Dobi kit to my G60, 2" lift. Shocks were way to short and matched stock limiting flex a lot. I bought the kit from Glen Dobinson himself and when I called him to try and get the right length shock he couldn't find any longer ones to suit my truck. So I ended up selling them to a guy with stock suspension and I fitted Rancho 5000's in the correct length. Flex increased...

I liked Dobi springs but hated the shocks. :roll:

Posted: Mon Jul 31, 2006 2:56 pm
by Potter
i have to dobinson 3 inch lifted shocks ill get the part number tonight for you

Posted: Mon Jul 31, 2006 5:30 pm
by felsy
RMP&O wrote:I fitted a Dobi kit to my G60, 2" lift. Shocks were way to short and matched stock limiting flex a lot. I bought the kit from Glen Dobinson himself and when I called him to try and get the right length shock he couldn't find any longer ones to suit my truck. So I ended up selling them to a guy with stock suspension and I fitted Rancho 5000's in the correct length. Flex increased...

I liked Dobi springs but hated the shocks. :roll:
thanks

with the patrol sitting level in my driveway, i removed the shocks rear dobinson shocks, and checked how much the shock would go till it topped out, their was only 2" of tavel downwards,
these shocks would be fine for standard height!!

Posted: Mon Jul 31, 2006 6:37 pm
by Potter
here is the number

0507 GS45 913

thats all i could find stamped on the shock.

these give me heaps of flex

Posted: Mon Jul 31, 2006 7:46 pm
by felsy
troll01 wrote:here is the number

0507 GS45 913

thats all i could find stamped on the shock.

these give me heaps of flex
thanks
yeah mine are gs45-115

thinks they are more suited 4 standard height, ripped off!!

Posted: Mon Jul 31, 2006 11:24 pm
by Suspension Stuff
Matt

Your coils are going to fall out if you fit the 700mm 3" lift shocks to your 2" lift. Having said that, if you want them you can have them.

Shane

Posted: Mon Jul 31, 2006 11:36 pm
by fnqcairns
I too have the same shocks on a 2 inch kings lift, because you have HD springs (whatever that is.......???Lb) you may actually have a ride height closer to 3 inches that 2. This can then give the illusion the shocks are not long enough.
If possible jack up the chassis or wheel it so that you hang a tyre, then if safe reach under and see if the spring can be moved by hand or if it is still compressed.
HD springs will often support the vehicle closer to the springs free height compared to the softer lifts around.

I am interested to see what you find out, if they are too short it's a shame because for the price they do a good job everywhere else.

Dont forget to also check if they compress enough to touch bumpstops also, I am not sure why mine don't could be the springs are binding, never the less, not a real important problem to me yet, still getting the rest of the package where I want it.

cheers fnq

Posted: Tue Aug 01, 2006 12:23 am
by Suspension Stuff
Good advice fnqcairns,

Don't forget your coils will settle a little once they have been given a workout. Do you have much weight in the back at them moment. Full tank of fuel.

Flex it up and unbolt one of your shocks and see how much further you can flex it before the coil becomes loose. Make sure you allow for your spring to settle a bit.

Shane

Posted: Tue Aug 01, 2006 12:42 am
by Beastmavster
4WD Stuff wrote:Matt

Your coils are going to fall out if you fit the 700mm 3" lift shocks to your 2" lift. Having said that, if you want them you can have them.

Shane
I'm running shocks supposedly for a 4" lift kit at the rear with 2" lift (EFS mind you) and no problems.

However, it WILL depend on which spring rates you have. If you have a 2" heavy duty kit, it probably will have shorter free length than a 2" softer coil.

Best bet is - unbolt the rear shocks and jack lift one rear corner until the rear spring is almost unseated, then measure from top of pin to where the bottom bolt will go.

You'll need the swaybar disconnected to make it flex that much - but if you run the swaybar normally and intend to keep it, then dont bother.


Then take them back and say "these things are too short I want some flex - gimme X mm long".


Best way to get suspension - let the guy you're buying from know what you want up front, or they will sell you HD flexless suspension (for safety reasons, higher volume = better margin, and also less likely to sag).

When I saw the specified lengths when buying the shocks, I spoke to the suspension dude and let him know I was concerned it wouldnt flex enough. He advised me to test them, and that he was happy to take them back and give me longer ones if they didnt make me happy.

As soon as I fitted the springs and flexed it up on the jack I could see they were chopping about 3" of travel out. I'm sure with the rear swaybar on it would have been the swaybar restricting it instead.... but hey, we know what swaybars are good for :D

No need to even take it out of the garage. And he did swap them, no questions asked. Gotta love service like that.

That was from 4wd Trekmaster in Pickering Street Everton Park. They do Dobinson, EFS (Carrolls) and Lovells stuff.

Posted: Tue Aug 01, 2006 4:07 pm
by felsy
ok i've disconected sway bar and shock crossed up 4b.
can easily fit 700mm shocks befor shocks come loose.


but the amount i have to cross it up to need the bigger shocks is alot!

at the moment the shocks top out while driving on the hyway over largish
bums such as the joins in a bridge.
unsure wether it would still do it after i have the stuffed shock/s replaced.







shane up to you wich shocks you send me, i'm no expert in this matter i think the longer stroke shocks would be better, but the ones i have now
are suposed to be the correct length,

and i dont want you to have any hassles with dobinsons trying to sort this out.

the



the shocks on the front are great,
just having probs with the rear unsure if its just the one shock or two

Posted: Tue Aug 01, 2006 6:18 pm
by Suspension Stuff
Dam I am surprised that the 700mm shocks will go. So before we go doing anything, are you certain about getting the longer shocks and coils not falling out.

So if you confirm, I will send you the longer 700mm extended length shocks and I will take back both the shocks you have. I will cop the price of the shocks if you chip in some of the freight. It is really worth being completly happy with your setup.

p.s. Good to hear the front is all good.

Shane

Posted: Tue Aug 01, 2006 6:30 pm
by felsy
4WD Stuff wrote:Dam I am surprised that the 700mm shocks will go. So before we go doing anything, are you certain about getting the longer shocks and coils not falling out.

So if you confirm, I will send you the longer 700mm extended length shocks and I will take back both the shocks you have. I will cop the price of the shocks if you chip in some of the freight. It is really worth being completly happy with your setup.

p.s. Good to hear the front is all good.

Shane
i'll go the longer shocks i can pay freight,
do you want me to write on the dodgey shock so you know which is stuffed?

thanks 4 all your help

will recomend to friends

Posted: Tue Aug 01, 2006 6:35 pm
by Beastmavster
Before you do that, also check the length for full compression at the other side.

Longer shocks may mean extra travel, but remember the fully compressed lenth will now be something like 360mm for a 700mm long shock.

No good having extra long shocks if that stops compression at the other side.....

Posted: Tue Aug 01, 2006 6:41 pm
by Suspension Stuff
Yeah write on the dodgey shock
You will have to raise your bump stops 2" or there abouts.
So you're not inconvinienced, I will send these shocks 1st.

Shane

Posted: Tue Aug 01, 2006 8:31 pm
by felsy
do you have the measurment for compressed and extended length for the both shocks shock

Posted: Wed Aug 02, 2006 10:53 am
by Suspension Stuff
Rough Measurements
660mm extended 400mm compressed
700mm extended 425mm compressed

Posted: Wed Aug 02, 2006 3:37 pm
by felsy
4WD Stuff wrote:Rough Measurements
660mm extended 400mm compressed
700mm extended 425mm compressed

longer shocks will work perfect then, doesn't look like i'll have to extend bump stops either!!

Posted: Wed Aug 02, 2006 5:57 pm
by Beastmavster
Sounds like your rear setup will end up about the same as mine, except using the dobinsons bits instead of the EFS bits.


If so you should be pretty happy with the end result.

Betcha they rub on the inside of the wheelwell too unless you stick with the stock 31"s.


Good to see the support from Shane. Excellent stuff...