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Bill Bourne

Diff replacement

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Hi all

 

After re-building a 5, I had an annoying (not much, but enough) whine from the diff. We had refurbed the original diff, but only with new seals, gaskets etc. There was a little play as expected. The original diff must have done 85K+, but we felt it was worth just putting it back to see what sort of condition it was really in. Well it it whined especially, around the 50mph mark on or off load, it was much the same.

 

Anyway a while back, I had my 6 diff re-built. That was whining too, I took it to a specialist (I won't shame them yet) but it was re-built with a new crown wheel and pinion. It cost around £1200 and it still whined. I took it back, he checked it, said all OK. Re-fitted, and it still whined. Very, very dissapointed to say the least.

 

So with trepidation I thought I would try Hardy Engineering in Leatherhead, after getting some positive recommendations. A while ago I bought a complete unknown 3.45 diff off Ebay for around £100. So thought I've got nothing to lose to get Hardy Eng to evaluate and advise, which they duly did. This diff needed a new crown wheel and pinion, new bearings etc etc. Hardy Eng supply their own crown wheel and pinion, made to their spec. I'm no expert, so I don't remember everything they told me, except the teeth on their crown wheel and pinion are made with a slightly bigger curve, which apparently provides a quieter engagement. Well I have just fitted this diff to the 5 and taken her for a test drive. - Only 10 miles or so. But whine gone, really quiet, no clonking, nothing. Well pleased and it cost £700.

 

I'll be taking the original 5's diff to them next and then after that my TR6's diff.

 

I know, in the past, there have been quite a few frustrations expressed on here over diff repairs like mine. So I thought I would pass this on.

 

https://www.hardyengineering.co.uk/

 

No connection, just a happy customer

 

best

Bill

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Thanks Bill

 

Always good to hear a satisfied customers recommendation. Its the sort of job we only want to do the once.

Paul

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Hi Bill, great job done by the sound of it,

 

So who should we avoid that built your expensive original Diff ??

Cheers,

Conrad.

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Hi Bill, great job done by the sound of it,

 

So who should we avoid that built your expensive original Diff ??

Cheers,

Conrad.

Ah... I'll tell you when it goes in for another re-build. Then I'll know the reasons why..Otherwise it's not fair. That won't be a for a while yet though. I'm having a total of 3 diffs done. The one, that's just been done. Then the TR5 diff will be going into them this week. Then when that's done. I'll swop it over with the current one in the 6, and then when that's done I can tell you the results. Should be interesting.

 

best Bill

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Yes agreed, sounds like you have some heavy lifting to do underneath your cars !!

Have fun,

 

Conrad.

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Yes agreed, sounds like you have some heavy lifting to do underneath your cars !!

Have fun,

 

Conrad.

 

Conrad,

You don't have to struggle trying to manually lift the diff under the car.

Faced with having to fit the diff lying under the car, with no garage pit or lift available and fed up of diffs falling off the trolley jack I made a cradle with a spare trolley jack saddle welded under it which slots onto my trolley jack and keeps it stable but allows it to twist for fine adjustment. Simple, makes the job much easier.

With your premises as close as you are to me you're welcome to borrow it if you want.

 

Dave McD

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Morning Dave , what a generous offer.

 

Thankyou for that, i may well take you up on it , sometime in the futur.

I hope that you are having a successful summer.

Cheers,

Conrad.

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Conrad

Don't struggle with it manually, it's a killer!!

Get something like this for a trolley jack.

Allows you to angle upwards and then slide forwards to clear the front mounts into where the chassis backbone narrows, then bring up level to locate the rear mountings.

 

post-13577-0-13023000-1534679996_thumb.jpg

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Interesting piece of kit John...

 

I have done the lying on my back bit more than once, so dont fany it again.

Cheers,

Conrad.

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Conrad

Don't struggle with it manually, it's a killer!!

Get something like this for a trolley jack.

Allows you to angle upwards and then slide forwards to clear the front mounts into where the chassis backbone narrows, then bring up level to locate the rear mountings.

 

That's the same platform that I used, but fortunately on a hydraulic stand which I can get under my ramp. But this might help as it would be the same on a trolley jack. I cut some 2x4 timber to go across the rear end of the platform and a small piece of 2x1 timber to go in the front. Then adjust the 2 peak parts each side to sit on the small drive shafts and it all sits very stable. If need be, increase the height at the nose end of the diff to give you a better entry/exit angle. Works a treat even when you only have a 1/4 inch clearance to play with.

Best Bill

Edited by Bill Bourne

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