3rd gear crunch

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Alimr2786
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3rd gear crunch

Post by Alimr2786 »

I have a 1994 n/a mr2 and only in 3rd gear when down shifting it tends to notch very annoying, im thinking its the 3rd gear synchro? Is there anything else it could be?
Many thanks


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benckj
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Re: 3rd gear crunch

Post by benckj »

Gear oil
Cable bushes
Engine mounts
Square bush
Synchros or bent fork......

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Alimr2786
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Re: 3rd gear crunch

Post by Alimr2786 »

Many thanks buddy i will investigate
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Re: 3rd gear crunch

Post by chrisE »

Start with your cable bushes as they're the first things to wear-out and the easiest to replace.
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Alimr2786
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Re: 3rd gear crunch

Post by Alimr2786 »

Any ideas where I could get some gear cable bushings from? Many thanks
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Re: 3rd gear crunch

Post by MR2DI4 »

Replace the oil in the transmission immediately, it never gets replaced.

The gearbox will last forever if the oil is replaced every 60,000km with Castrol Syntrax 75W-90.

Over 230,000km on mine and no issues at all with shifting.
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jimi
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Re: 3rd gear crunch

Post by jimi »

Black is not a colour ! .... Its the absence of colour
Image

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Alimr2786
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Re: 3rd gear crunch

Post by Alimr2786 »

Thanks jimi

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Alimr2786
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Re: 3rd gear crunch

Post by Alimr2786 »

So abit of an update, ive changed the gear cable bushes (brd bushes) and the gearbox oil, one of the old buses in the centre where it slides over the linkage was oval in shape and had slight play but despite replacing the bushes and changing the gearbox oil there is still the same notchy/crunchy noise it doesn’t sound like a crunch but more a notch only when dropping from 4th to 3rd gear
Im just going to live with the notchy noise
Many thanks for everyone’s help

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Re: 3rd gear crunch

Post by MRHAPPY62 »

did you check the square bronze bush at the linkage ?
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Alimr2786
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Re: 3rd gear crunch

Post by Alimr2786 »

No i need to check that bush where about is this bush located?

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Re: 3rd gear crunch

Post by MRHAPPY62 »

look in the bgb its at the gearbox end between the linkages you can rotate it ,rather than replace it.
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Alimr2786
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Re: 3rd gear crunch

Post by Alimr2786 »

What is bgb?
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Re: 3rd gear crunch

Post by peteV6R5 »

Alimr2786 wrote: 09/06/20 23:56 What is bgb?
Big Green Book - toyota service manual and electric diagrams
https://www.mr2oc.co.uk/know-your2/mk2/ ... bgb-s.html


also check your front and rear engine mountings, if worn the engine can rock too far and not allow smooth operation of the gear link cables, this can cause notchiness or none selection (if mountings are really worn)
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