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The mkiv Supra Owners Club

Difficulty changing into 1st and reverse on a 6 speed


Guigsy

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So. Got my new car and when it's cold changing gears is fine. But after a little drive putting it into reverse is a 2 hands and all my bodyweight job.

1st also gets much harder, although nowhere near as extreme.

 

Is this a clutch issue? Or the box getting too hot? Might need a oil cooler?

 

My trans tunnel near my left foot gets bloody hot. I have no carpets ATM but even with just a mat on the floor I can feel the heat through my shoe.

But so far have put this down to no carpets and a 4" downpipe on a single :p

 

Any ideas?

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Need an oil change in the box did you get that done? what clutch has it got? need to get some heat resistant matting layed on the tunnel for your own reasons to bud, i got a full week of after this weeks done, can bring it over as ill be doing alot of work on mine:)

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I was hoping that's the issue but not sure. Cant help but think its the clutch its an rps but not sure off the top of my head which one.

 

I'm slowly making a list of bits then I'll get it back in the garage to be finished off. Will get the interior and some dynamat stuff in to get the road noise down its a bit like driving a tin can atm.

 

With it not having any road tax till friday things keep popping up when I drive it. Didn't realise it's got no aircon till yesterday. So will have to refit That...

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This sounds very dodgy. The first thing I would do is change the oil out. The fact that it is heating up so much is never a good sign.

 

Next thing to do is adjust the clutch pedal so that the biting point isn't so low to the floor. Once the biting point has been raised you should find it much easier to select gears. That's the problem I found with my RPS clutch on the MR2 but I didn't have any heat issues.

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I think the heat is a combo of the exhaust and no carpets etc. It's not shoe melting hot. Just more than I'm used to. The trans tunnel nearer the seat is ok.

 

Thinking of it the bite on the clutch is close to the floor... Hopefully that's it. I guess the clutch gets warmed up and the bite moves a little and it's just too far for an easy change into 1st and reverse.

Also might explain why the car has stalled while coasting a few times. Hum...

 

Not sure if it's got a short shifter. Will have a nosy tonight. The throws seem short but I've never driven a v160 for Orr than a day :p

 

How easy is it to adjust the clutch pedal position?

Edited by Guigsy (see edit history)
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So if I'm reading this right from the diagrams I just need to bring the peddle further out to bring the bite further from the floor? Can I then move the peddles starting point back in? I assume you can but can't make that out from the diagrams. Maybe I'm just stupid.

 

Don't want to end up with my knee arround my ear all the time ;)

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Does it have a short shifter? Mine had issues with shifting into a few gears once the Cs shifter was installed - had to mess with the rubber gaitor under the shifter.

 

:yeahthat:

 

I lost all the "bottom" gear selection with mine - reverse, 2nd, 4th,6th. Removed the short shifter and all was good

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So if I'm reading this right from the diagrams I just need to bring the peddle further out to bring the bite further from the floor? Can I then move the peddles starting point back in? I assume you can but can't make that out from the diagrams. Maybe I'm just stupid.

 

Don't want to end up with my knee arround my ear all the time ;)

 

You don't really need to move the pedal from where it is (as long as it's at a comfortable height). You want to adjust the push rod so that it is further into the slave, giving you a head start before you start pushing on the pedal. Don't go nuts with this though, a few turns makes quite a big difference.

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Worn gear stick cradle bushes, makes shifting hard.

Best to change to solid billet bushes.

 

Change gearbox oil to Royal Purple Synchromax, 2 ltr needed.

 

That's a good thing to look at too.

 

Are you getting major crunching when you are trying to put it into 2nd? If not then it could be the selector that's fooked. The clutch might be disengaging just fine.

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Not that I recall. It only happens when the car is warm/hot tho. That wouldn't affect the selector would it?

 

If your exhaust is toasting it then yes, I guess it would.

 

My MR2 was the opposite, when it was warm it would loosen up. This is because the travel was not correct on the pedal. I'm now thinking that your issue may be more to do with the gearbox selector or something around that area.

 

Can only try the cluth pedal though, it certainly won't go wrong. At least you can lift it off the floor a bit :)

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