Noisy diff and it's all my fault

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tinweevil
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Noisy diff and it's all my fault

#1 Post by tinweevil »

I'm doing some mad mad hours for work at the moment and as a result Tuesday before last I was travelling home on the M23 at 21:00 instead of the more usual M25 at 18:00. This meant I had the road practically to myself and a strong desire to see my bed. The usual 70 elephants cruising speed became a less car friendly 90 elephants. Wednesday morning the slight increase in diff noise was immediately noticable. By Thursday evening it was pretty darn noisy (80 miles a day). I topped up the oil Saturday, it didn't need much which improved it a little.

It's not got any worse or better since then, is there anything I can do? I've never done any work on a diff so I've no real idea of the internals. Is the 1500 diff a collapible spacer type and if so could I have collapsed mine? It is noisy under load and quiet on overrun so I'm pretty sure its the cw&p not bearings.I'm hoping the rapid onset of noise means something has gone which can be replaced.

I'm planning to do the rear wheel bearings over the bank holiday weekend weather permitting, is there anything worth a try on the diff or do I just plan to send it off for a new cw&p somewhen?

Tinweevil
1978 Pageant Sprint - the rustomite, 1972 Spitfire IV - sprintfire project, 1968 Valencia GT6 II - little Blue, 1980 Vermillion 1500HL - resting. 1974 Sienna 1500TC, Mrs Weevils big brown.
Sprint36

#2 Post by Sprint36 »

When you see what a new cwp costs you'll probably have other ideas. Most people just swap the whole diff for a known quiet one.

While we're on the subject (slight hijack) does anyone have access to a Sprint diff case spreader tool that they would like to lend/sell me? Or know whre to get one?

David
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Mad Mart
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#3 Post by Mad Mart »

I have a home-made one David that I got from the po of SFB.

I don't want to sell it & it's quite heavy to post... but if you get desperate!!!!! :)
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

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Sprint36

#4 Post by Sprint36 »

Thanks Mart, I'll bear it in mind. Do you have a photo at all?

Cheers,

David
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#5 Post by Mad Mart »

No, don't have a photo but can easily be arranged. When do you need the use of one. I was thinking I could take the dims. & draw one up for you so that you could make your own?


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Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


2012 Porsche Boxster 981 S


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Jod Clark
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#6 Post by Jod Clark »

I bet you a quid its the wheel bearings.

Jod
Vindicator Sprint, Honda Fireblade RRX 919cc, re-powered by AB Performance. Quick.
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tinweevil
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#7 Post by tinweevil »

You're on and I really hope I lose.
1978 Pageant Sprint - the rustomite, 1972 Spitfire IV - sprintfire project, 1968 Valencia GT6 II - little Blue, 1980 Vermillion 1500HL - resting. 1974 Sienna 1500TC, Mrs Weevils big brown.
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#8 Post by Jod Clark »

Did I win my quid? My rear wheel bearings are unbelievably noisy now, they're turning pedestrian's heads.
Vindicator Sprint, Honda Fireblade RRX 919cc, re-powered by AB Performance. Quick.
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#9 Post by tinweevil »

Not yet and I don't think your chances are good. I got the bearings ages back but have not had time to fit them yet. I hadn't any real reason to do 'em except that they had not been done in recorded history. Previous previous owner had the car from 62599 miles in May '86 and kept scrupulous records. Previous owner didn't have it long and did little. After I did the fronts recently I thought I ought do the rears as well. Since the Le Mans trip of 600 very heavily laden miles the bearings are now pretty noisy, easy to diagnose so I'm positive the original noise is the diff. Bearings are not anywhere near head turners yet but they are catching up with the diff fast.

Tinweevil
1978 Pageant Sprint - the rustomite, 1972 Spitfire IV - sprintfire project, 1968 Valencia GT6 II - little Blue, 1980 Vermillion 1500HL - resting. 1974 Sienna 1500TC, Mrs Weevils big brown.
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#10 Post by toyracer »

My front bearings were rumbling like mad when I got back from Le Mans - had them changed after an advisory on the MOT last week, and they are nice and quiet now..
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