Rear diff front bolt........help!!

[rstoughy]

So I'm needing a tap for the diff housing. Now the spec is a weird one. M14x1,5x65-10.9

So I managed to source a M14x1 tap but it's wrong.

Anyone able to tell me the size I actually need?

Urgent as required to catch a boat for Ring trip in a couple of days.

Cheers

[Monkey]

So I'm needing a tap for the diff housing. Now the spec is a weird one. M14x1,5x65-10.9

So I managed to source a M14x1 tap but it's wrong.

Anyone able to tell me the size I actually need?

Urgent as required to catch a boat for Ring trip in a couple of days.

Cheers

Hi Paul, looks like you have got the correct bolt size, but the incorrect pitch, you will need a M14x1.5 according to the bolt size.

Sourcing that at short notice may be difficult, good luck!

[alexk]

Paul can you show me in the parts diagram which bolt you are talking about ?

[rstoughy]

Cheers guys,
Sorted. The joys of friends who own machine shops.....lots of stuff like that so called in a favour and picked a Tap up tonight.

:thumbs: :thumbs:

Might just make this boat yet....:bigcry:

[Graham]

Sounds like we had the same issue!! When putting my rear subframe back together there must have been some crap on the bolt and it dragged it all the way through and ruined 2/3 of the thread, couldn't figure out why it was clonking when pulling away. Turned out the bolt wasn't actually doing anything. Got a longer bolt and no longer an issue, but next time it is removed I will be getting an insert put in

[Chad]

Sounds like we had the same issue!! When putting my rear subframe back together there must have been some crap on the bolt and it dragged it all the way through and ruined 2/3 of the thread, couldn't figure out why it was clonking when pulling away. Turned out the bolt wasn't actually doing anything. Got a longer bolt and no longer an issue, but next time it is removed I will be getting an insert put in

Had same clunk due to front diff bolt coming loose a couple of times, used some locktite in the end, all good now

[rstoughy]

So diff is now all tight but the clunk is still there
You can hear it in the vid in most corners.

https://www.youtube.com/watch?v=SSMAHu9wksE

[Chad]

So diff is now all tight but the clunk is still there
You can hear it in the vid in most corners.

https://www.youtube.com/watch?v=SSMAHu9wksE

I would check with a pry bar, to see if there is still movement, pry between subframe and front diff mount,I could lift front of diff, fair old clunking until got it real tight

[Graham]

Does it clunk if you put the car in gear, and pull the clutch up and down quickly? Almost like you are slamming it into gear. When I did that we knew there was an issue and it's because the bolt wasn't tight on the threads. Once a longer bolt was inserted with good grip on the threads that hadn't been ruined, it stopped doing it.

[rstoughy]

No it doesn't Graham. It's SMG but have tried the same sort of thing. Going to swap out the solid subframe mounts for PF Black's next year and see if that helps. The diff is solid now with no movement.

[Chad]

No it doesn't Graham. It's SMG but have tried the same sort of thing. Going to swap out the solid subframe mounts for PF Black's next year and see if that helps. The diff is solid now with no movement.

Have you thought about engine mounts being torn, chad

[rstoughy]

Yes Chad.
I had brake failure at an earlier round this year and hit the tyres at a recorded 58mph on Vbox. It sheared all the mounts so all were replaced engine and box and it's still bloody there!!!! Lol

[Chad]

Yes Chad.
I had brake failure at an earlier round this year and hit the tyres at a recorded 58mph on Vbox. It sheared all the mounts so all were replaced engine and box and it's still bloody there!!!! Lol

Only found problem, diffbolt problem, by getting car over solid brick built pit,and really makeing things move around with motor running,just couldn't do that on BMW workshop lifts, as they moved around to much, then found problem clunking straight away, chad

[Chad]

Yes Chad.
I had brake failure at an earlier round this year and hit the tyres at a recorded 58mph on Vbox. It sheared all the mounts so all were replaced engine and box and it's still bloody there!!!! Lol

Hi , " from original post", did you find out what this problem was , bugs me when when problems and ""fixes ". don't get posted back up, always interesting to find out, as always like to do all my own services and repairs.

[shimmy]

Yes Chad.
I had brake failure at an earlier round this year and hit the tyres at a recorded 58mph on Vbox. It sheared all the mounts so all were replaced engine and box and it's still bloody there!!!! Lol

Bloody hell, missed this.......hope it didnt hurt pride, pocket or limbs too much