T-Case gear ratios 1.53:1

[aka rover]

Im Installing a om617 Benz into my 109 and am wanting to run a set of 3.54 axles I have. With the current 3.54 ratios I need to lower the final drive to get the Benz motor into its sweet spot at 60 ish. I could go with the stock 4.7 ratio and run a OD or High ratio t-case gears and be in good shape. But i have a set of stage one axles and the rear is a Sals so im wanting the extra strenght. Any ways the 109 military and forward Control I think came with these ratios. Any help on where to get the gears to do a swap would be great.

Cheers Ed

here is a neet ratio calculator I have been using "kinda fun to play with"

http://www.grimmjeeper.com/gears.html

[Ren Ching]

I think what you are looking for is the 1 ton transfer case. Regular MOD trucks used the 1 ton chassis but had the same tcase gearing as regular Series

[aka rover]

I think what you are looking for is the 1 ton transfer case. Regular MOD trucks used the 1 ton chassis but had the same tcase gearing as regular Series


Aw thanks for that, do you know if there is any strenght differences? And or what years they where available.

Thanks Ed

[Ren Ching]

http://en.wikipedia.org/wiki/Land_Rover_Series


1 Ton

The 1 Ton 109" - produced from 1968 to approx 1977, covering late IIA and early series III Models. It was basically a Series IIB Forward Control built with a standard 109" body, featuring 2.6 litre petrol engine, lower ratio gearbox, ENV front and rear axles, (Salisbury front and rear on later Series IIIs) though some late IIAs were fitted with ENV axles in front and Salisbury on the rear. The chassis frame was unique to the model and featured drop-shackle suspension similar to the military series Land Rovers. 900x16 tyres were a standard feature and these machines were commonly used by utility companies and breakdown/recovery firms. Only 170 IIa and 275 (approx) Series IIIs (1 Ton) were built for the home market.
[edit (http://en.wikipedia.org/w/index.php?title=Land_Rover_Series&action=edit&section=10)]





Aw thanks for that, do you know if there is any strenght differences? And or what years they where available.

Thanks Ed

[aka rover]

Looks like i might be after a rare bird ? Has anyone out there swapped just the gears to lower the final drive? I know everyone trys to raise it due to the stock gearing.

Thanks Ed

[Ren Ching]

in thinking about this, it would be easier to find the 4.7 gears. that would give you much better off-road performance. and you can get rid of the weak factory 3.54 rover r&p in the front. while you are at it, have the diff pegged.

[aka rover]

in thinking about this, it would be easier to find the 4.7 gears. that would give you much better off-road performance. and you can get rid of the weak factory 3.54 rover r&p in the front. while you are at it, have the diff pegged.


So the 3.54 gears are weaker than the 4.7s in a rover? I maybe on the wrong track then I have allways thought the lower the ratio the weaker the gear set. I have the 4.7 front but would need to source the 4.7s for the sals.

So I need to do a little more research on the gear strenghts and weaknesses of rover axles.

Thanks for the info.

Cheers Ed

[Ren Ching]

Get the good aftermarket 4.7s for the front. They will be stronger than the factory 3.5s. Use the factory 4.7gear set for the rear. No need to worry about the factory salisbury gears AFAIK.

ratio has less to do with it than toothe cunt and profile. at least that is my understanding.

what size tires are you planning to run?

So the 3.54 gears are weaker than the 4.7s in a rover? I maybe on the wrong track then I have allways thought the lower the ratio the weaker the gear set. I have the 4.7 front but would need to source the 4.7s for the sals.

So I need to do a little more research on the gear strenghts and weaknesses of rover axles.

Thanks for the info.

Cheers Ed

------ Follow up post added December 8th, 2011 02:26 PM ------

holy typo batman...

TOOTH COUNT

[Stormer]

That was quite a typo, DB.