Jump to content
Sign in to follow this  
Sausage

085 5th gear whine

Recommended Posts

Got a nice quiet smooth 085 gearbox DXD code (off a 1.0  think) but it whines in 5th only.

Will check and change the oil on it and have the cover off to look soon but what is this likely to be? Have a spare 5th gear here available.

Share this post


Link to post
Share on other sites

Well the oil was a bit low and very thick, so someone has been in there and done who knows what,  some gold shimmer from the synchro rings, but no nasty swarf, nothing obvious under the end cover, refilled with a more correct grade of oil as that was all i had and will test it out soon. I'm hoping probably in vain that it was just low on oil.

Share this post


Link to post
Share on other sites

Having just been in the presence of greatness to rebuild my box, i can confidently say that the only thing that needs doing is the needle roller bearing needs to be changed (5th). Low oil is fine briefly, but if it whines, it means that the plastic needle roller bearing cage has melted. You can get to it via the metal side cover without stripping the entire box. About £4 :)

 oh, and while in there, swap the circlip shim for a new thicker one to take up any slack from wear.

  • Like 1

Share this post


Link to post
Share on other sites

Well that sounds promising. I have a knackered 1.0 box in half so can pull 5th off there and see what the score is with the bearing in there before doing the working box. 

Share this post


Link to post
Share on other sites

Noticeably quieter and quicker car with correct level and grade of oil. The thick oil in it was sapping power, still whines in 5th but not nearly as bad.

Share this post


Link to post
Share on other sites

Knackered / melted 5th gear idler bearing next to the one salvaged from my spares box.

Dscn5094.jpg

Poxy torx bolt stripped on the spares box, so stillsons to remove it. same on the gearbox on the car FFS! Have to drop gearbox an inch or so as well to get puller on it.

Dscn5096.jpg

knackered 5th gear means i have to change the gears as well, tips are spalled over and rough.

Dscn5098.jpg

5th from spare gearbox...

Dscn5099.jpg

Cobbled together this from 2 different pullers, probably wont fit on the one on the gearbox without further mods.

Dscn5100.jpg

Had to call it a day from now.

 

Edited by Sausage

Share this post


Link to post
Share on other sites

Wow, you're lucky. A bit more use and a needle could have dropped out and game over. Must have got really hot. Use the old synchro. It has visibly more life left in it. :)

 

Share this post


Link to post
Share on other sites

Back together again....

Dscn5101.jpg

Not convinced the fork clip is correct, I swear it came off with the fork between the clip not on the outside of it, but i could not work out how to get it back on like that and the manual makes it seem easy without actually showing it. 🙄

Dscn5102.jpg

Need a fatter circlip 2.4mm instead of the 2.2mm on there.

Dscn5103.jpg

Edited by Sausage

Share this post


Link to post
Share on other sites
21 hours ago, LR5V said:

Good work Sausage

That crud on the needle roller - that was it eating itself wasn't it?

Yes, here it is after washing it:

 

Dscn5104.jpg

Just waiting for the fatter clips to turn up and will redo the fork clip then as I know it isnt right.

Edited by Sausage

Share this post


Link to post
Share on other sites

Yay!

Dscn5106.jpg

Squeezed 2.5mm clip on there in the end. Flushed then refilled gearbox.

Still seems a bit noisy in 5th on axle stand though, will test it properly soon though.

Edited by Sausage

Share this post


Link to post
Share on other sites

How thin was the original clip? And how many miles had the box done? Just curious to know how much wear there was over time.

Apparently that clip should be just very slightly loose when replacing it.

And make sure that fifth is easy to engage before sealing up. You need to adjust the fork so it's just loose.

stick an electric drill on the input shaft once you've chucked some oil in there. Should be silent. If still noisy, could be that another bearing has gone or is going. Now's the time to refurb it if you're concerned. Parts are about £120 plus labour.

Edited by mk2

Share this post


Link to post
Share on other sites

Original clip = 2.2mm, manual said clip should just fit, measured slack with feeler blades and came to 2.45mm, so ordered 2.4mm and 2.5mm clips. 2.5mm fitted in the slot so used that.

I dont know mileage on the box as it is not original to car.

5th adjusted no probs, box is in the car so can only drive it on stands or take it for a spin which i will do probably on the weekend.

I couldnt get the idler bearing metal inner bush off the shaft on the spares gearbox to match the 5th idler bearing i used without damaging it, so didnt bother, just checked the one in this box for obvious marking and used that. I will overfill by 500ml as well I think.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×

Important Information

By using this site, you agree to our Terms of Use.