Noisy Diff Query?

[Lukey]

Broke my original 3.9 diff last week, fitted a 3.54 rs diff and my prop flange to it, all went in fine but its making like a constant grinding noise when in motion, its not a drone like a bearings gone tho, any ideas what causes this, have i done the flange nut up too tight?

 

any help would be appreciated

 

Cheers

Luke

[ADY]

How on earth did you mange to do that? lol

[escort21]

Who the hell does a burnout backwards anyway??

[442]

just reversed up and axle "jumped" prob did damage. burnout was forwards about 35 foot , thats what happens when you got plenty of torque!!!!!

[Toby]

If you have, you'll need to replace the crush tube which is a bit involved.

 

The diff should turn over freely and smoothly by hand. There is supposed to be a small amount of drag in the oil seal and bearings.

 

Do you know if the diff was a good one prior to you getting your grubby mits on it?

[Lukey]

If you have, you'll need to replace the crush tube which is a bit involved.

 

The diff should turn over freely and smoothly by hand. There is supposed to be a small amount of drag in the oil seal and bearings.

 

Do you know if the diff was a good one prior to you getting your grubby mits on it?

 

It was a bit of an unknown mate, it was free moving out the car but noisey, i assumed it was dry and would quieten with the oil going thru it. i've sourced a 3.75 is this any good? basically i'm after better top end so i can happlily cruise at 75/80 on motorways, my original 3.9 revved high at this speed

[NeilT]

the 3.7 on my 1600 pinto capri cruses nicely on the motorway at about 80 its around 3000 RPM

[dave waudby]

the crush washer should be set/torqued properly and have the correct back lash

 

id be carefull if youve just swapped flanges and nipped/tightened it up

[Toby]

A 3.7 will certainly have longer legs but will drop your acceleration back a bit. Longer legs sounds like what you're after though.

 

Oh for a leggy blonde......

[samurai]

I got a new full diff bearing/washer kit if you want to rebuild your diff.

 

60 pounds and its yours.

 

PM me

[Lukey]

I got a new full diff bearing/washer kit if you want to rebuild your diff.

 

60 pounds and its yours.

 

PM me

 

is it something i can do myself? do you need to press them in or anything?

[Toby]

Given how expensive diffs are these days it probably not worth the risk of fudging one up - get someone who knows what they're doing if I were you - you need a few special tools.

[Joe-ashtonmobile]

Given how expensive diffs are these days it probably not worth the risk of fudging one up - get someone who knows what they're doing if I were you - you need a few special tools.

 

Good advice

[Lukey]

Cheers guys, advice taken. Prob going to source a decent 3.5 or 3.7, either will improve drivability greatly. keep you all posted