Transfer rubber mounts

Thanks john and Dougal for the info. Will have a protoype mount finished tomorrow so will see if the vibs decrease. Will also look for those softer mounts.

Thanks justin

That's weird Justin, mine is actually at it's smoothest at 2-2200rpm I usally try and keep the engine running at 2200 cruise speed. In 4th this means 80 in fith this means 105.
I think I do know the small vibration that your talking about though, mine is higher in the rev range however. around the 2400 rpm though. I just had put it down to my bodjied up rear propshatf, I really should go get it properly balanced sometime.

those different mounts sound interesting though, keep us posted.

Cheers

Quote:

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Originally Posted by Larns

That's weird Justin, mine is actually at it's smoothest at 2-2200rpm I usally try and keep the engine running at 2200 cruise speed. In 4th this means 80 in fith this means 105.
I think I do know the small vibration that your talking about though, mine is higher in the rev range however. around the 2400 rpm though. I just had put it down to my bodjied up rear propshatf, I really should go get it properly balanced sometime.

those different mounts sound interesting though, keep us posted.

Cheers

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It could be 2400 as the RRC tacho may not be too acurate. Have made a custom crossmember using a GU nissan rubber mount. Much much smoother at idle as it lets the drive train move around. testing with some hard rock crawling tomorrow and will post pics if all goes well. This set up is on a LT230 by the way.

Justin

umm which vibration are ou trying to get rid of?

the one at idle or the one that they get when they are up near the top third of the rev range?

the one at idles easy, wind the idle up 50 or so rpm.

The one at the top end is a lot harder to get out of the engine but when it gets really bad its usually a sign of a hardened+cracked mount (usually the passangers side one) and occasionally the harmonic balancer being dead.

Quote:

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Originally Posted by DRanged

Hi all

Just want to run one by you all. I have always had a vibration in the engine- trans area at around 2000 - 2200.
I am thinking it could be the transfer case mounts. now when we installed the Isuzu into the RRC we used Isuzu engine mounts, but retained the V8 transfer case mounts. The Transfer is mounted with one rubber mount either side in a ''V'' configeration.. I have noticed on my diesel 4x4 work ute it has only one trans mount and its in the centre and is very flexible.

So should an Isuzu set up be very flexible or a bit ridgid.

Your thoughts and experiances and set ups may save me a lot of trials.

Justin

ps i am leaning towards the flexible option.

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OMG someone with an Isuzu has admitted they Vibrate.............
So when i tell you they rattle apart and destroy gearboxes if left idling for long periods, you might believe me???

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Originally Posted by sclarke

OMG someone with an Isuzu has admitted they Vibrate.............
So when i tell you they rattle apart and destroy gearboxes if left idling for long periods, you might believe me???

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My R380 is 4 years old behind the Isuzu all off road work with plenty of idling. How many gearboxes has your Isuzu killed;)

Justin

Quote:

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Originally Posted by Blknight.aus

umm which vibration are ou trying to get rid of?

the one at idle or the one that they get when they are up near the top third of the rev range?

the one at idles easy, wind the idle up 50 or so rpm.

The one at the top end is a lot harder to get out of the engine but when it gets really bad its usually a sign of a hardened+cracked mount (usually the passangers side one) and occasionally the harmonic balancer being dead.

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Thanks dave will check it out a bit closer, did have some cracks in it but did the normal mount check all ok. Might just order a new unit and replace it to be sure. Probably would be old age rather than use. 450hrs in 4 years. Can you get these mounts from Isuzu or are they a LR part. I cant remember where I ended up getting them. Have a feeling they were LR stock.

Justin

the mounts should be available from both sources...

if you have a close look, providing they are both standard rover mounts you will find that one has a rubber sleve over it and the other doesnt. if you can get both of them with the rubber sleve that seems to help the life of them.

(but you have to rememeber to wash inside the sleeve after you go fording or on the beach)

Quote:

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Originally Posted by DRanged

So should an Isuzu set up be very flexible or a bit ridgid.

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They've gotta be flexible mounts, otherwise you'll break stuff. Remember it's a big four cylinder with no balance shafts.

Mine rocks around maybe +/-15mm at idle on the mounts.

Quote:

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Originally Posted by sclarke

So when i tell you they rattle apart and destroy gearboxes if left idling for long periods, you might believe me???

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Not likely.:p