172 race car 5th gear crunch rebuilt box

[Markwills74]

Hi guys,
My car has developed a crunch when going into 5th (3rd and 4th ar fine), if I change really slowly I can select 5th without crunching.
The gearbox was rebuilt last year by a specialist (previous owner) and it’s covered about 500miles since.
Any ideas what it could be, is it a box out job?
Thanks

 

[Yosemite Sam]

If it’s been fully rebuilt and it’s doing that after less than a year, I’d be taking it back to whoever built it.

 

[Markwills74]

Thanks Dan, as I said the box rebuild and gripper was paid by the previous owner, I haven’t contacted the builder yet, but can do as he is on here!😂

 

[Yosemite Sam]

Thanks Dan, as I said the box rebuild and gripper was paid by the previous owner, I haven’t contacted the builder yet, but can do as he is on here!😂

Sorry, my bad. I didn’t see the previous owner bit.

in that case your only option is to have it rebuilt. The builder and you don’t have any form of contract so it’s not his problem. Technically speaking.

 

[Cub.]

In addition, there is no knowing how / what was done to it after it being rebuilt.

Could have been slammed into gear by a ham fisted buffoon everyday. Or it could have had the wrong oil put in it etc. Based on a recent post on here, could even have had coolant put in as gearbox oil substitute. 🤣

So it’s not really the builders problem, as noted above.

In answer to your question, it sounds like a box out refurb job by the sounds of it. Synchro probably, but it could be other stuff.

Is it running a different gear selector (like a PMS etc) and have you checked it’s not that causing problems?

 

[Markwills74]

In addition, there is no knowing how / what was done to it after it being rebuilt.

Could have been slammed into gear by a ham fisted buffoon everyday. Or it could have had the wrong oil put in it etc. Based on a recent post on here, could even have had coolant put in as gearbox oil substitute. 🤣

So it’s not really the builders problem, as noted above.

In answer to your question, it sounds like a box out refurb job by the sounds of it. Synchro probably, but it could be other stuff.

Is it running a different gear selector (like a PMS etc) and have you checked it’s not that causing problems?

Hi Cub,

Yes it does have a PMS shifter, and no its not been slammed into gear by a baffoon, only me!! Cant you take the end casing off to get at 5th gear like you could with my old Peugeot BE3 box? (sorry new to Renaults)

 

[Cub.]

Hi Cub,

Yes it does have a PMS shifter, and no its not been slammed into gear by a baffoon, only me!! Cant you take the end casing off to get at 5th gear like you could with my old Peugeot BE3 box? (sorry new to Renaults)

From how you’ve described it, it sounds like the synchro but it’s worth checking the PMS setup once it’s all been put back together.

I don’t think you can get to the gears without the whole box coming out, but @NorthloopCup, @Scrooge and @Romanian Tyre Fitter can advise better than me.

Don’t worry, the ham fisted buffoon may have been prior to your ownership 🤣

 

[Speedo Gonzales]

You can swap 5th gear just taking the end cap off

Not much else you can do though🤣

 

[NorthloopCup]

It’ll be that PMS shifter. All boxes I build get new synchros from 3rd to 5th as well.

For some reason they’re proper finicky to get right going into 5th. Seen a lot do the exact same thing.

 

[Martin_172]

the box ive got in my van came out a 182 with a short shifter, also crunches 5th, i just stuck a standard shifter back on it

 

[Yosemite Sam]

It’ll be that PMS shifter. All boxes I build get new synchros from 3rd to 5th as well.

For some reason they’re proper finicky to get right going into 5th. Seen a lot do the exact same thing.

I dont even have a pms shifter and mine was a complete nause to get set up right so it doesn’t crunch in to 5th.

 

[Speedo Gonzales]

Useless chuffs, setting up shifter is easy work


*cries in gearbox crunching noises*

 

[Bankrupt_drunk]

I've had issues with 5th on mine, it's a northloopcup built unit installed by AW motorworks. AW have had it back once and it's better, but fast changes into 5th, particularly when it's hot, can still provoke a slight crunch. Next weekend I'm upgrading to Redline MT90.
I'm also very cautious about 5th gear changes now. They're always done nice and slow...

 

[Markwills74]

Cheers guys, appreciate the help as always, I’ll try and adjust the PMS shifter, and let you all know👍🏻

 

[Louis]

Based on a recent post on here, could even have had coolant put in as gearbox oil substitute. 🤣

 

[NorthloopCup]

I've had issues with 5th on mine, it's a northloopcup built unit installed by AW motorworks. AW have had it back once and it's better, but fast changes into 5th, particularly when it's hot, can still provoke a slight crunch. Next weekend I'm upgrading to Redline MT90.
I'm also very cautious about 5th gear changes now. They're always done nice and slow...

Oil and the pms shifters are the biggest problems you’ll come up against mate.

Every build I do I always state Redline MTL or MT90.

 

[Cub.]

View attachment 1557189

Trouble in the mk2 Clio gear box oil

Right lads changed gearbox oil on the clio mk2 1.2 petrol and first drive it was tuff to get it in some gears is tha just the oil circulating or did I use the wrong one or something?? Any help would be appreciated

cliosport.net

 

[Horatio McAllister]

Trouble in the mk2 Clio gear box oil

Right lads changed gearbox oil on the clio mk2 1.2 petrol and first drive it was tuff to get it in some gears is tha just the oil circulating or did I use the wrong one or something?? Any help would be appreciated

cliosport.net

Jesus! I can’t believe I missed that thread. What a monumental c**k up 😂

 

[Louis]

Trouble in the mk2 Clio gear box oil

Right lads changed gearbox oil on the clio mk2 1.2 petrol and first drive it was tuff to get it in some gears is tha just the oil circulating or did I use the wrong one or something?? Any help would be appreciated

cliosport.net

Hahahahahahaha.
And I thought I was dumb when I grabbed a 1l of engine oil by accident and shoved it in my old box 😂

 

[Yosemite Sam]

Hahahahahahaha.
And I thought I was dumb when I grabbed a 1l of engine oil by accident and shoved it in my old box 😂

Lots of guys on the Trafic/Vivaro pages run engine oil on their gearboxes. It’s really common.

 

[Speedo Gonzales]

Lots of guys on the Trafic/Vivaro pages run engine oil on their gearboxes. It’s really common.

The lad that rebuilds my gearboxes puts 10w40 in their rebuilt boxes. Never had a single issue🤣

 

[Markwills74]

Thanks for all the advice guys, as @NorthloopCup said it was a PMS shifter issue, adjusted the linkage and it’s all good again,
Cheers

 

[Flob]

The lad that rebuilds my gearboxes puts 10w40 in their rebuilt boxes. Never had a single issue🤣

Really?

 

[Speedo Gonzales]

Really?

Aye

Obviously not in boxes with LSD's and s**t but anything else it's fine. The NFP in my PK4 is too thick as standard, that's usually why the bearings eat themselves

 

[Flob]

Im not sure I would be putting 10w-40 in a gearbox. Im sure viscosity might be semi ok but thats about it.

 

[Speedo Gonzales]

Yeah I don't run it either, but it shows that you can get it seriously wrong like @Louis and it will still be fine 😂

 

[Louis]

😂 I blame Renault for making all the bottles look f**king identical

 

[Flob]

😂 I blame Renault for making all the bottles look f**king identical

In your defense they are the same bottle

 

[Speedo Gonzales]

But also you're a r****d🤣