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Rb25 Gearbox Conversion Into An R32

Roy
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Roy Grand Master

Roy

Posted
Posted

I want to buy a cf drive/prop shaft for my car from the current group buy,

Only my car is an R32 GTSt which will be running a R33 gearbox and normal rear end.

I figure since i need to mod the prop shaft i may as well get a new one. So does anyone know from their RB25 gearbox conversion whether the shaft length is any different? Shorter, longer? Or is it just different connections?

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https://www.sau.com.au/forums/topic/223212-rb25-gearbox-conversion-into-an-r32/
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  • 5 months later...
THENIG Community Regular

THENIG

Posted
Posted
Hmm. probably need to just wait and confirm length of tailshaft whenever the 20 box blows

Sorry to bring up old thread, Roy did you ever end up putting the 25 box in your r32? Just wondering how did you solve the speedo sender problem if you have? Been doing my head in figuring out where to get the bits from in melbourne, having a little trouble tracking down a Navara speedo sender (dont know what year Navara and being told no longer stocked by others), i am not too confident with cutting and shuting bits and pieces to come up with a reliable solution, would much prefer a drop in option even if it is a bit more. You reckon you could throw any leads my way?? Cheers

Rob

bubba Grand Master

bubba

Posted
Posted

You can get away with just dropping a Navara sender straight in if you have taller diff gears..

I put 3.9s in mine and the 17T Navara sender resulted in my speedo reading 7kmh high, perfectly fine as far as I'm concerned :blink:

If you don't have any luck finding a part number, shoot me a PM, I think I've still got the box at home somewhere.

  • 2 weeks later...
FATGTS-R Experienced

FATGTS-R

Posted
Posted

Playing with the sender myself at the moment. Got a navara sender and chopped off the gear as I have a 4.3 diff.

Pulled the cog from the 33 box and now not sure what way to go about attaching the 33 cog to the navara shaft?

The 33 senders cog was just attached with a circlip and the navara cog was moulded on meaning the shaft from the navara sender is full circle whereas the shaft from the 33 sender was alkf moon on the end.

So...I'm left with a cog thats half moon through the centre that needs to be attached to a full circle shaft. The cogs from the 33 are no longer available so dont want to muck it up. How have other people gone about it? My best thought was to get a dremel and small grinding stone and slowly chop it away?

B0oStEr Mentor

B0oStEr

Posted
Posted
Playing with the sender myself at the moment. Got a navara sender and chopped off the gear as I have a 4.3 diff.

Pulled the cog from the 33 box and now not sure what way to go about attaching the 33 cog to the navara shaft?

The 33 senders cog was just attached with a circlip and the navara cog was moulded on meaning the shaft from the navara sender is full circle whereas the shaft from the 33 sender was alkf moon on the end.

So...I'm left with a cog thats half moon through the centre that needs to be attached to a full circle shaft. The cogs from the 33 are no longer available so dont want to muck it up. How have other people gone about it? My best thought was to get a dremel and small grinding stone and slowly chop it away?

I have posted the solution to this problem so many times I've lost count.

Some others here have slowly caught on.

If you can't be bothered searching get a sharp round file and carefully make the half moon in the 33 cog perfectly round.

It will be a nice press fit onto the navara splined shaft and shouldn't need glue.

Don't forget to recut the location slot on the navara speedo drive 180 degrees opposite the original slot or it will only last a short while.

FATGTS-R Experienced

FATGTS-R

Posted
Posted

Touche mate.

I ended up searching and found the answers...many times over lol. I think I may go with grinding down the navara shaft though. Coz if I stuff up I can get another one. I also found that the R32 GTS4 has a 21 tooth cog. Cant find out which way the teeth are cut though....

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