Series 3 Rebuild Series 3 Suffix B gearbox as Suffix D

I have a very tired Series 3 Suffix B gearbox. I sourced it out of a paddock, emptied the water out, cleaned it up and rebuilt it, it works after a fashion, but it really needs a good going over and a lot of new parts.

Can anyone tell me, if I am replacing basically all of the innards, can I rebuild it as a Suffix D?

Or are the cases fundamentally different?

If anyone has done this, a bit of advice would be very helpful. I've found bits and pieces on the web which allude to this being possible, but no definitive statement.

Cheers
Andrew

Think so, the suffix A had a different reverse gear, and you've to change all gears to match, if you can get them.

Get the parts manual out and start writing down the parts you need.

Wildefalcon said:

Think so, the suffix A had a different reverse gear, and you've to change all gears to match, if you can get them.

Get the parts manual out and start writing down the parts you need.

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I rebuilt mine to suffix D when I did mine, you will probably find most of the parts that need to be replaced to update the box are probably worn already. There are only a couple of parts that you cannot buy genuine.
You may be able to glean some of the parts needed and errors that can be made doing this very thing from here https://www.landyzone.co.uk/land-rover/series-3-109-six-pot-rebuild-thread.367834/page-10

Thanks guys. I see from having a brief look on the web that specific Suffix D parts do appear to be in better supply than some of the Suffix B stuff, so it strikes me as the logical way to go, as I'll be doing the lot.

The main difference I recon is with the reverse idler and it's shaft, roller bearing not bush. Reversing a series with a bush idler a long way can result in the bush seizing on the shaft! Ask me how I know this.

Many of the actual gears are different as well as other internal parts, however if you are doing the lot it makes sense to update.

Now I just have to find the 1/2 synchro and 3/4 synchro OEM......

Needles in haystacks come to mind!

Kiwi Landie said:

Now I just have to find the 1/2 synchro and 3/4 synchro OEM......

Needles in haystacks come to mind!

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If you cannot the Italian ones from synchro in the link I sent are pretty decent.

Yep - I'm scouting around trying to find people who have them in stock. The units from TAS in Italy do look to be nicely machined parts, for sure.

Thanks for your help on this.