MGB / Ford 9" Hybrid axle build ???

mgbv8 · Post by **mgbv8** » Sat Mar 08, 2014 8:04 pm

stevieturbo wrote:You shim either side of the bearings to move the crownwheel from side to side

Yep!!
Simple as that

And with a mate nearby who has a precision grinder, the selection of shims I have can be altered however I want ?

BUT!
That will not be required now. Kiwi came round today and we hauled the rear axle out of the MGB and fitted the spool into my actual diff case with the shims I have already machined and it dropped in perfectly. With the bearing caps fitted the spool has no sideways play and can be turned with a feather light touch

We took some measurements and the 6mm I was expecting to have to remove to get the crown wheel where it should was actually 7.9mm. So not far off on my original measurements with a tape measure

So it will be 3mm off the crown wheel and 5mm off the spool flange, then my mate can get busy with re drilling the spool flange to take the crown wheel bolts.

This is all getting quite exciting now !

The drive shafts are now on their way via UPS so I'm hoping to see them by the end of next week? Fingers crossed

stevieturbo · Post by **stevieturbo** » Sat Mar 08, 2014 8:54 pm

You can buy shim packs for very little money, and there are loads of them.

8.8 lash is set the same way, I've hundreds of the shims here. If you buy a bearing/rebuild kit, they include the shims. At least I think that's how I ended up with so many !

minorv8 · Post by **minorv8** » Mon Mar 10, 2014 8:44 am

Stevie, could you provide OD / ID dimensions for the 8.8 diff carrier shims ?

I need to look into my rear axle due to clonking noise and I suspect I need to fix something

My axle is SD1 / TR7 type and the shims are mostly NLA.

mgbv8 · Post by **mgbv8** » Mon Mar 10, 2014 9:10 pm

minorv8 wrote:Stevie, could you provide OD / ID dimensions for the 8.8 diff carrier shims ?

I need to look into my rear axle due to clonking noise and I suspect I need to fix something My axle is SD1 / TR7 type and the shims are mostly NLA.

If its clonking it may just need a service kit for the pinion gears due to wear. Its like the MG diff which has shims on the small gears to take up wear on the cogs. I think I have a set of brand new Ford 8.8 diff gears in the garage if you are interested ?

Perry

minorv8 · Post by **minorv8** » Tue Mar 11, 2014 6:17 am

I have a narrowed TR7 rear axle with Quaife ATB so unfortunately it´s not the small diff gears. I hope it´s just the collapsible spacer, not the ATB or the shortened halfshafts.

stevieturbo · Post by **stevieturbo** » Tue Mar 11, 2014 2:23 pm

minorv8 wrote:Stevie, could you provide OD / ID dimensions for the 8.8 diff carrier shims ?

I need to look into my rear axle due to clonking noise and I suspect I need to fix something My axle is SD1 / TR7 type and the shims are mostly NLA.

approx 75mm OD, 55mm ID

mgbv8 · Post by **mgbv8** » Thu Mar 13, 2014 7:33 pm

The Boys are now in town

DaviesDJ · Post by **DaviesDJ** » Thu Mar 13, 2014 7:48 pm

That is one hell of a half shaft pel (as the actress said to the bishop!!!) what was the original application for this ford axle??

stevieturbo · Post by **stevieturbo** » Thu Mar 13, 2014 7:58 pm

What spline old/new ?

Old look tiny !

Blown v8 · Post by **Blown v8** » Thu Mar 13, 2014 8:15 pm

Let's hope these are unbreakable !
This thread has made it States side,
http://forum.britishv8.org/read.php?6,44299

mgbv8 · Post by **mgbv8** » Thu Mar 13, 2014 8:16 pm

stevieturbo wrote:What spline old/new ?

Old look tiny !

Old MG is 25 spline and the new shafts are Ford 9" 31 spline in 4140 forged steel. Apparently these are 10% stronger than the normal 1514H steel that these shafts are made with for most applications. ??

I gave my shaft dimensions to the guy in the USA and he says that the new shafts will be approx 89% stronger than the Moser shafts with the smaller diameter ?

stevieturbo · Post by **stevieturbo** » Thu Mar 13, 2014 9:04 pm

25's just look so tiny.

I'm sure even the base material in 31 would be fine.

I did twist the splines a little on my Moser 31's, but when that happened I was around 1700kgs race weight. So a lot heavier than you I'd imagine

The Mark Williams in 31 have been perfect so far. That said, havent been to a proper drag strip for several years now.

mgbv8 · Post by **mgbv8** » Thu Mar 13, 2014 9:07 pm

The MGB is 1300kg with me inside !!

stevieturbo · Post by **stevieturbo** » Thu Mar 13, 2014 9:17 pm

After some changes this year...mine's bloody 1760kgs now !!!! ( incl 1/2 tank )

WTF

Either that or the scales are wrong lol

chodjinn · Post by **chodjinn** » Fri Mar 14, 2014 7:40 am

mgbv8 wrote:The MGB is 1300kg with me inside !!

1300kg?! That's a hefty 'B. You're not that big are you Perry??

Where does all the extra weight come from? The supercharger isn't that heavy ...?