Prop shaft flange

Clutch, Gearbox, Overdrive, Propshaft, Differential, Drive Shafts, Hubs.
Post Reply
Message
Author
kennyd
Newbie
Newbie
Posts: 8
Joined: Thu Apr 13, 2017 11:28 am

Prop shaft flange

#1 Post by kennyd » Sat Jul 15, 2017 7:18 pm

Hello, Can someone advise me the size of the nut that holds the prop flange on the gearbox output shaft, I intend to replace the oil seal and want to make sure I have everything to hand, Thanks in advance Kenny.

johnnydog
Senior Member
Senior Member
Posts: 591
Joined: Tue May 14, 2013 12:33 pm
Location: Lancashire

Re: Prop shaft flange

#2 Post by johnnydog » Sat Jul 15, 2017 11:02 pm

They are 3/8 UNF and 1 1/8" long, tightened to about 25ft lbs (or as tight as you can reasonably do them!)
Just a question - why do you want to replace the original? When they have been removed previously, have the nyloc nuts been partially rounded by the use of an open ended spanner? I use a thin ring spanner on the head, and a thin wall 1/4" drive 9/16 AF socket on the nut with a 1' long breaker bar, as it's usually not possible to get an opened spanner on the nut fully and this risks rounding the flats if it slips. This way it's possible to break each nut without risking an opened ended spanner slipping.
Register Member no. 1596

1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red

tony
Senior Member
Senior Member
Posts: 691
Joined: Sun Jun 14, 2009 5:35 am
Location: New Zealand

Re: Prop shaft flange

#3 Post by tony » Sun Jul 16, 2017 6:17 am

As above. Nice Stahwille ring spanners for me. NO open enders . Not 1/4" but 3/8: x 9/16" socket. :shock:
Tony.
1976 2500 TC.

Lots of bits

1999 BMW Z3.
2003 BMW 525i Touring.
Hopefully not needing too many bits.




.
Hopefully don't need bits !

kennyd
Newbie
Newbie
Posts: 8
Joined: Thu Apr 13, 2017 11:28 am

Re: Prop shaft flange

#4 Post by kennyd » Sun Jul 16, 2017 7:21 am

Thanks for the replies, Sorry if did not make myself clear , I actually meant the nut that holds the prop flange to the out put shaft,

johnnydog
Senior Member
Senior Member
Posts: 591
Joined: Tue May 14, 2013 12:33 pm
Location: Lancashire

Re: Prop shaft flange

#5 Post by johnnydog » Sun Jul 16, 2017 11:47 am

If you mean the large castellated nut / nyloc nut on the end of the mainshaft rear flange that bolts to the front end of the propshaft, then they are 3/4" UNF. The specified torque is 100-110 ft lbs.
Register Member no. 1596

1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red

Firewatcher
Newbie
Newbie
Posts: 9
Joined: Fri Jun 23, 2017 9:46 pm
Location: Newtown, Powys

Re: Prop shaft flange

#6 Post by Firewatcher » Sun Jul 16, 2017 4:09 pm

Done this myself recently, you need something handy to hold the gearbox flange when you unscrew the retaining nut.
I'm not keen on wrenches around the collar, so use a piece of flat bar like the photo below - bolt to the gearbox side of the flange and hold while you loosen and re-tighten the flange retaining nut. Its a piece of 25x10mm flat bar about 250mm long with a 10mm hole with a relief ground out to clear the flange collar. Anything similar will do as long as it is stout enough not to bend.

Pete
Prop Flange Holder Img.jpg

User avatar
Dave B
Senior Member
Senior Member
Posts: 835
Joined: Thu Dec 27, 2007 8:37 pm
Location: Wigan,Home of the mighty Warriors

Re: Prop shaft flange

#7 Post by Dave B » Sun Jul 16, 2017 5:38 pm

johnnydog wrote:If you mean the large castellated nut / nyloc nut on the end of the mainshaft rear flange that bolts to the front end of the propshaft, then they are 3/4" UNF. The specified torque is 100-110 ft lbs.
The socket required is 1-1/8" AF.
Club Member 2035
1970 2500 Mk2 in pimento red
1972 2000 Mk2 in sapphire blue
Vauxhall Omega 3.0 Elite
Vauxhall Vectra C Design lpg
Vauxhall Insignia SE

kennyd
Newbie
Newbie
Posts: 8
Joined: Thu Apr 13, 2017 11:28 am

Re: Prop shaft flange

#8 Post by kennyd » Mon Jul 17, 2017 6:09 am

Thanks to all who replied? :D Job done !! less than one hours work, all well .

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests