| Author | Topic |
|---|
Registered:
February 2005
|
 Corona Gearbox problems
|
Thu, 12 May 2005 23:53
|
 |
Hi
My 1973 Corona Mark II RX12 has some gearbox problems.
on 1st and 3rd gear it makes a lot of noise, but on 2nd and 4th its all quiet, im thinking it has some worn out bearings, but if thats correct, how difficult is it to change them?
i was also thinking the gearbox might have run very low on oil, but then it should have made noise on all gears?
anyone have any good ideas?
Im also considering upgrading to a 5speed instead of the 4speed, but can i use 5speed from any cressida or celica that has R serie engine? if so will the box itself mount straight in or is there diffrences?
i have a 81 cressida 5speed box from a 21R, will this fit? i also know of a 78 celica 18R 5 speed, how about this one?
thanks for ur answers 
|
|
|
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 00:02
|
|
You won't necessarily have killed all the bearings if the box has run low on oil and its also possible the synchromesh has gone (high pitched whine) on those two gears and not the others. Still, if the box is noisy its time to rip it open and replace the bits inside.
The W50 is the 5 speed you want and you will find that in models the same vintage as yours. Its most common/numerous in 18R engined Celica's, RA23/28/ and 40.
The W50 5 speed will bolt straight on no worries in place of your W40 4 speed.
If the 81 Cressy box is a W50 it *should* fit fine, the W50 from the 78 Celica will fit no worries.
How did you end up with your master cylinder problems ?
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 00:11
|
|
Hi
thanks for ur answer.
Do you happen to know if the w59 box fit? i have one of thoose, its from a 1c diesel.
The master cyl problem i havent started trouble shooting anymore yet, im waiting for my new discs and pad to arrive first, but i found out i can adjust the rod a bit, so i think it will be fine when i get everything back in its place, and then i can try to adjust it, hopefully it will work fine then, im still hoping to avoid taking the cylinder back off and have to bleed the entire system again..
|
|
|
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 00:21
|
|
Nope, W59 will not fit. Anything from W55/57/58 will not fit also. Only a W50 will do the trick.
Personally, I don't think you will find enough adjustment at the brake pedal to make up for the change in master cylinder piston travel.
I think you will have to bite the bullet and pull the new MC off and compare it against the old MC, to fix the problem. Good luck with it.
|
|
|
I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 00:28
|
|
Well a W55/6/7/8/9 could fit if you used a bellhousing from a 21/22R from say an RX60 Cressida... 
The W50 behind the 18R will also fit.
I'm making the assumption you have an 18R in your RX12 (and not a 12R).....
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:04
|
|
Hi again
well probably i end up having to pull the mc back out, but thats gonna be the last thing i do, but soon, thats all there is left to be done
Well the reason why i thought the W59 might fit, is that it seems to have simular bellhousing to the W50,cept they have starters on diffrent sides, they look like they are both attached to the box identical, but its not so easy to see while theyr still in the cars. i thought i might be able to change bellhousings between them, are u sure this is not possible?
just have to make sure it doesnt fit before i pull out my w40 and buy another box
do you happen to know what engines the w59 will fit to, after changing bellhousings, without getting the bellhousings made.. if you know what i mean....
|
|
|
I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:11
|
|
| gianttomato wrote on Fri, 13 May 2005 10:28 |
I'm making the assumption you have an 18R in your RX12 (and not a 12R).....
|
Do you have an 18R or a 12R?
|
|
|
Location:
Finland
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:30
|
|
Your Cressida box is W55 and with bellhousing from that Cressida you can use your W59(or the W55). Beware the ratios in W59!
My 1C did have W51 behind it, so you are sure that your diesel box is W59?
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:37
|
|
Hi
My engine is a 18R.
I dont know if my gearbox is W59, thats just stuff i read on some websites, that said 1c has a W59 gearbox.
If its W51, will it fit my 18R then?
W59 means its really a supra gearbox with diffrent bellhousing then?
How can i find out what my gearbox really is?
thanks again
|
|
|
Location:
Finland
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:41
|
|
| Quote: |
If its W51, will it fit my 18R then?
|
Yep!
You can identify W51 and W59 from case material. 51 = iron and 59 = aluminium.
|
|
|
I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:44
|
|
| Ta22lover wrote on Fri, 13 May 2005 11:37 |
Hi
My engine is a 18R.
I dont know if my gearbox is W59, thats just stuff i read on some websites, that said 1c has a W59 gearbox.
If its W51, will it fit my 18R then?
W59 means its really a supra gearbox with diffrent bellhousing then?
How can i find out what my gearbox really is?
thanks again
|
Goodo. Then you can use either gearbox as Jayem and myself have explained.
W51 steel case, W59 alloy case. If they are painted, use a magnet to identify the case material.
|
|
|
Location:
Finland
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 01:48
|
|
Is your diesel box out of CA60 Carina or CE70 Corolla? (assumption  )
Either way, W51 does have shorter first gear and longer 5th compared to W50.
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:03
|
|
Hi
the box if from a 1981 carina.
hmmm now i got confused, i can use both w51 and w59 on the 18R?
or only W51?
or can i use my w59 too, but then i can only use bellhousing from cressida and not my old w40 bellhousing?
hmm wheres my magnet... im pretty sure its alu tho..
but no matter what i have to change bellhousing right?
how about the shifter, are they all the same or can i do something to move my old shifter to the new box?
thanks again for all ur help
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:06
|
|
i went outside to check now.
the bellhousing is alloy, the middle is iron, the rear is alloy..
so is it a w51 then?
|
|
|
Location:
Finland
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:08
|
|
| Quote: |
the box if from a 1981 carina
|
sounds like T50 to me!
IIRC 1C was introduced 1983!!!
Or has somebody done some 1C swap to old Carina???
|
|
|
Location:
Finland
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:10
|
|
|
Yes it's W51(or W50) but it aint originally from 1981 Carina.
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:13
|
|
Hi again
Yes ur right, i remembered wrong, the carina is actually 1983.
so that its iron in the middle means its w51, so i can just use the w40 bellhousing?
do they have the same length so i can use the same tailshaft?
|
|
|
Location:
Finland
Registered:
November 2002
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:29
|
|
Thanks again
seems like my corona will be a 5speed tomorrow then.
will the high 5th gear ratio be a problem, or will it be just good to lay cruising on low rpms?
one last question, how about the speedo thingy, is it just to pull out the one i use now, and plug it into the w51 box?
|
|
|
Location:
Finland
Registered:
November 2002
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:41
|
|
No worry, I'd be more annoyed about short first.
Speedo cable will just plug in but speedo itself might be inaccurate. You might need to change the gear thing that drives the cable. Search for this if in doubt. I go to sleep now, it's 5:40 for gods sake 
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 02:56
|
|
How do i find the gear thing that runs the speedo? do i have to open the box? i guess i better just put in my speedo stuff from the w40 box then.
hmm just wondering how to get to it inside the box.
good nite and thanks for ur help
|
|
|
Registered:
February 2005
|
|
Re: Corona Gearbox problems
|
Fri, 13 May 2005 20:47
|
|
Hi again
now i changed the speedo stuff and the bellhousing, so everything is ready to be put back into the car, but now i have another problem.
the gearbox crossmember is very diffrent attached to the box.
the old w40 cross member is mounted 26cm from the tail of the box and in, and the screws on the box sits very high.
the new w51 box has the crossmember mounted only 16cm from the tail and in, and its screws sits very low.
does anyone happen to know if there is a crossmember that i can use from something.. or do i have to make a new one from scratch?
the carina crossmember and the rubber gearbox mounts i may be able to use, the rubber on it looks good, but it has come loose from the buttom plate.. i guess it will be pressed down against that plate anyway, can i use them or should they be thrown away?
|
|
|
