Noisy at 60to tell what diff

Post by **JaneHibbert** » Thu Aug 30, 2012 11:47 pm

hello again, now the car is off the road with brake issues just at the moment but have another question if that is okay? i have read that the standard diff on a 1000 is a 4:22, but what does 4:22 actually mean? also i have been told that morris 1000s can zoom about happily at 60 - 65 all day, but little Bell gets very noisy at 55 (well thats what the speedo says anyhow!). so was wondering maybe it had a van diff on it?? how could I tell?

that was chating with two questions!

Post by **bmcecosse** » Fri Aug 31, 2012 12:16 am

4.22 is the number of turns the engine must do (in top gear) to turn the road wheels once....... Yes of course it is noisy! But a good 1098 will run at 70 mph without any great problem - probably not able to hold that up long M'way hills, but otherwise ok. It's a fair enough ratio for a standard engine. Best bet will be to check the speedo against a GPS or a Sat Nav. Usually they read 5 to 10 % fast -so your 60 mph is very possibly only 55 mph........

Post by **JaneHibbert** » Fri Aug 31, 2012 4:16 pm

top gear is fourth gear?

Post by **JaneHibbert** » Fri Aug 31, 2012 11:14 pm

but can you tell what diff it is without taking it out?

Post by **bmcecosse** » Fri Aug 31, 2012 11:27 pm

Yes - you need to jack up a rear wheel off the ground. Then turn the prop shaft 4.22 turns.......however - because it's working through the differential - the rear wheel will turn 2 turns !

Post by **JaneHibbert** » Sat Sep 01, 2012 9:33 am

ah, with the car out of gear turn it by hand 4.22 and the road wheel should turn twice. got it.

Post by **bmcecosse** » Sat Sep 01, 2012 9:39 am

May be easier to take all the spark plugs out - and turn the engine over 4.22 (so 4 1/4 turns) in top gear with the starting handle....

Post by **JaneHibbert** » Sat Sep 01, 2012 11:59 pm

Which IS top gear? Fourth or First?

Post by **Fingolfin** » Sun Sep 02, 2012 6:41 am

Fourth -- the lowest gear is the lowest number, the highest (topmost) is the highest number!

Seconded with the starting handle, but I would suggest having a friend to either do the counting or the turning.

Post by **bmcecosse** » Sun Sep 02, 2012 9:00 am

Chalk mark on the tyre - and take up all the 'slack' before you start counting......

Post by **chrisryder** » Sun Sep 02, 2012 10:50 am

Alternatively you could look for external markings on the differential itself. You should find '9/38' stamped somewhere on there if it's a 4.22 diff. If there's a filler plug on the diff itself, it's probably a 4.55 diff.

In your original post you say that ' i have read that the standard diff on a 1000 is a 4:22'. This is only true for a 1098 '1000', around 1963 onwards. A 948 '1000' (1956 - 1963ish) would have a 4.55 diff.

Post by **JaneHibbert** » Mon Sep 03, 2012 8:38 pm

hi everybody i have turned the wheels and it seems like a 4:22 happy now that i KNOW what it is. thanks

Morris Minor Owners Club

Noisy at 60to tell what diff

Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff

Re: Noisy at 60to tell what diff