Help needed Thurrock area

[Qotato]

Howdy there guys I have a technical question and wonder if there's any owners in the area who would. Be able to have a helping half in solving it. I have a violent whole car shudder when I go above 50 under load. Stick it in neutral and coast at 50 and it seems to die down. Stick it back in drive and accelerate it comes back shaking the motor. It doesn't seem to shake the steering wheel more then the car. Iv just had some surgery for a cyst on my spine so I can drive but getting on the floor isn't very easy at the moment but possible. What would I be looking for if anyone has any ideas it would be amazing. Thanks in advance.. PS I have no idea if this is in the right area or not on the forum if needs be can it be moved to relevant area

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[elnevio]

My first port of call would be the gearbox fluid. What's in there, how old is it, is it the right level?

Assuming you have an autobox! The symptom you have described fits quite well with wrong and/or old fluid.

[Nick Mann]

Is it worse under heavy load or light load?
If light then I'd agree with Nev. If heavy then I would look at the cv joints, especially the front inners.

[Davezj]

is it Thurrock in london area.
just to pinpoint the area for local members.

[Qotato]

Yeh right near lakeside shopping centre sorry. Fluid may have slightly too much will check tonight when I'm back at the car. We changed the fluid to sp3 two days ago. The shudder was there before the fluid change. The old fluid was black as you like though. Getting the car up on a friends ramp on Friday. So should be able to look at cv joints ect then. Would too much fluid make it shudder then

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[Confused]

If the old fluid was very dark, then it's likely not been changed for a VERY long time, or has begun to cause damage internally. You may find that the new fluid has discoloured quite a lot already.

Was it standard spec Mitsubishi SPIII you replaced it with? How much new stuff did you put in?


We have had situations similar to this where Amsoil Universal ATF has "recovered" a gearbox from a bad state - it's not a guaranteed result, but it's possible that running some Amsoil for a couple of thousand miles can clear up and reverse some of the issues caused by poor fluid.

[Qotato]

Mitsubishi sp3 I got 20l of it from my local mitsubishi dealer flushed it through using the rad cooler pipe method. It's still rather red fluid in the sump yesterday after an hours drive. Il check the levels when I get home after work today. Never knew having too much fluid could cause a shudder. Whenmre would I source a drive shaft if it turns out to be a cv joint,?

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[Qotato]

Worse under heavy load i would say nick

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[Confused]

Too much fluid can cause it to aerate - this aerated fluid can then gets moved around, and rather than having nice uncompressible liquid in places where you should have liquid, you've got part liquid and part air mixture - the air can compress, which can cause shuddering.

The same applies with engine oil (to stop the crankshaft chopping at the surface of the oil, for example), or indeed any specified oil levels - these levels are often set to prevent these things from happening

[Qotato]

Too much fluid can cause it to aerate - this aerated fluid can then gets moved around, and rather than having nice uncompressible liquid in places where you should have liquid, you've got part liquid and part air mixture - the air can compress, which can cause shuddering.

The same applies with engine oil (to stop the crankshaft chopping at the surface of the oil, for example), or indeed any specified oil levels - these levels are often set to prevent these things from happening

Thanks I did think about aerated fluid but only thought about not having enough fluid. But makes sense having too much or too little really.

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[Qotato]

Levels seem to be alright after a 15 20 min drive was between hot and cold more on the hot side of the gauge. Il double check after a longer run today.

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[Nick Mann]

If worse under heavy load, I would still suspect the inner CV joints. For a quick fix, swap the two green cups from side to side on the gearbox/transfer box. You will lose some gearbox fluid doing the job though, so I'[d leave the cups in until you are ready to swap them both. If you are able, have a look at the working edge of the green cup - you should see where the bearings on the spider have been rubbing on the cup, but there shouldn't be any scalloping of the surface. If the surface is worn anywhere, it will be on the drive face of the green cup - swapping side to side means you will only get the problem accelerating hard at 40mph in reverse.....

[Qotato]

I still have 3l of fluid left so can always top it up with that. Thanks for the speedy reply. Il have a look at it doing that on Friday. I can see this being a complete ballache of a job without a proper ramp :'(

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[Nick Mann]

It's not so bad - remove the two bolts from the bottom straight arm which should allow the hub to swing away from the inner CV joint. The metal clips holding the boots are a pain to release. Ease the boot off the green cup, swing the hub away to allow the bearing spider to slide out of the cup. Do that on both sides, clean the grease and inspect. Swap the green cups if needed. Make sure the boots are intact and you put plenty of new CV joint grease back in there after.

[Qotato]

Sounds reasonable not as hard as my old del sol then. Just a back ache lol

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[Qotato]

Well changed over the cv joints from front to back and guess what. The vibrations are now minimal. Anyone got a pic of the trailer safer box fill and drain bolts? Suspect there's not alot in there lol

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[Nick Mann]

https://www.clubvr4.com/forum/showth...AYC-Oil-change

The whole guide is probably useful, but at this moment in time, post #6 and the fourth picture are most useful

[Qotato]

Youv been a ledgend thank you nick. I find it hard to find posts on tapatalk atm.

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[Confused]

Yes Tapatalk isn't great for searching, best to use the mobile site (or, the full site from your mobile), but even I've come round to Tapatalk for general browsing and posting, having been against it for years (for no viable reason, I must add!)

[Qotato]

Yeh iv not liked it to be honest but it's quick and easy lol

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