Gearbox identification

109al · 2024-12-23T18:52:29+0000

Can anybody help with identifying this gearbox from the photo? I get the c suffix but not the s prefix? Also 901 gearboxes were suffix a if I'm not mistaken?
Looking to tear down and rebuild is it best just to tear it apart before making any assumptions as to parts to order?
It selects all gears and turns over freely just want to make sure it's a solid spare just in case the inevitable happens one day lol
Many thanks for any input

steve2286w · 2024-12-23T19:24:05+0000

That’s a series 3 box but most likely 2a as it has the clutch slave housing on the LHS, the S means synchro on all 4 gears, if you’re keen to work on it, then best clean outside, strip , clean inside, inspect for wear, order bits you need then rebuild, they strip down quite quickly and not too hard to put together , don’t need many special tools.
Green bible a must and you tube helpful

109al · 2024-12-23T20:33:19+0000

steve2286w said:
That’s a series 3 box but most likely 2a as it has the clutch slave housing on the LHS, the S means synchro on all 4 gears, if you’re keen to work on it, then best clean outside, strip , clean inside, inspect for wear, order bits you need then rebuild, they strip down quite quickly and not too hard to put together , don’t need many special tools.
Green bible a must and you tube helpful

Thanks Steve
It could be an amalgamation of anything I guess. Service exchange suffix c maybe? Yes I'm willing to have a crack at it keep me out of trouble going Into new year and beyond lol
Have a good Christmas

tottot · 2024-12-23T20:50:36+0000

Some very late production Series 2a had a full syncro box but they were suffix D. Given the position of suffix on the transfer box it is a series 3 box. [2's had it on the actual gearbox] @steve2286w series 3 have clutch housing on the left.
"steamwally" has some very good videos series box overhaul on the you tube.

109al · 2024-12-24T12:31:26+0000

tottot said:
Some very late production Series 2a had a full syncro box but they were suffix D. Given the position of suffix on the transfer box it is a series 3 box. [2's had it on the actual gearbox] @steve2286w series 3 have clutch housing on the left.
"steamwally" has some very good videos series box overhaul on the you tube.

Thanks totot I'm thinking it's been apart and rebuilt before with different parts/boxes
Looking forward to see what's inside lol
Have a gd

tottot · 2024-12-24T16:47:28+0000

Will be looking to see what you find.

Gearbox identification

109al

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steve2286w

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109al

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tottot

Well-Known Member

109al

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tottot

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