BUGA Community
Technical => Driveline => Topic started by: Smartalec on October 22, 2009, 05:16:45 PM
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holden 202 an 3speed, whats the easyest to put in place of it?
a celica 5speed, or an aussie 4 speed.
as i dont know much, but love the learning along the way.
something to unbolt an bolt up would be great.. even if i had to cut a new hole in the floor for it..
please help..
the reason i suggested the above, as i herd they were easy?
otherwise anyone fancy the job in SA..lol
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the aussie 4 speed is a bolt up fit, to where a 3 speed was, with the 5 speed has a diffrent tail shaft, clutch, bell housing and more.....
on another note, the 5 speed is an overdrive, were as the 4 speed is 1 to 1 top gear...
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I started with
a 3 speed box...
easily changed it for
a 4 speed box
then
changed it for a Celica 5 speed box...which as mentioned is a lot more work...but well worth it!!
i reckon a overdrive pays for itself in the petrol u save ..
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going from 3 speed to 4 speed would meen i would save petrol an go the speed limit on the hiways ;D
is that the M20 or M21 im seeing a couple of different types on ebay
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The 4 speed is a pretty good option if you mostly do stop start driving, so long as your diff is a highway diff.
I think its the M21 that has a taller 1st gear otherwise they are much the same.
Warren
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it sounds like you need the 5 speed, 3 and 4 do exactly the same thing in top gear... or you could change the diff to highway gears, that could help you get to the speed limit
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My 4 speed box is for sale ..complete with flywheel,shifter...& 6 month old clutch n pressure plate.. PM if ur interested
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so if i changed from a 3 to a 4, does that meen i can then go 110kms instead of the boring 80kms, i can do 110kms now but it use's like twice the amount of fuel, an the motor wines like hell
NSW bit of a drive - but if you put it in. my miss's likes the idea of a 25hr country drive (dont know if i do tho..lol)
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Did you think about swapping the diff instead. That's the actual problem with the high revs. That will give you the biggest improvement.
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so if i changed from a 3 to a 4, does that meen i can then go 110kms instead of the boring 80kms, i can do 110kms now but it use's like twice the amount of fuel, an the motor wines like hell
NSW bit of a drive - but if you put it in. my miss's likes the idea of a 25hr country drive (dont know if i do tho..lol)
Sounds like you have the high ratio diff still (4:1) the highway diffs run around the 3:1 so as RT says a diff change may be a better option, combine the 4 speed box and you would have a good setup.
Warren
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ive got a 3.5 ratio with a turbo 700 auto overdrive box and if i wound this van up it would be doing 4,000 at 200kms. less than the amount of revs a standard beddy would do at 90kms. pretty cool eh..
i herd last night from a bloke 86kms is the most economical speed to travel at. for every 10km over than its the equiverlant of carrying 1 extra ton of weight. so at 200kms it would be like carrying 11.4 ton. wow.
he says this is the case with all vehicles, althou it must make a difference how high it is and sleak.
ben
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i herd last night from a bloke 86kms is the most economical speed to travel at. for every 10km over than its the equiverlant of carrying 1 extra ton of weight. so at 200kms it would be like carrying 11.4 ton. wow.
he says this is the case with all vehicles, althou it must make a difference how high it is and sleak.
ben
I'm not expert on the matter but that statment just doesnt sound right, there is way to many variables.
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Ben with that set up try putting the standard diff ratio back in, with the overdive you will still have a great top end but>>>>>>>>>> down low it would feel like you have rocket bostters ;D
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no thanks bas i enjoy getting 5 kms to the litre lol,
i herd last night from a bloke 86kms is the most economical speed to travel at. for every 10km over than its the equiverlant of carrying 1 extra ton of weight. so at 200kms it would be like carrying 11.4 ton. wow.
he says this is the case with all vehicles, althou it must make a difference how high it is and sleak.
ben
I'm not expert on the matter but that statment just doesnt sound right, there is way to many variables.
lol, im not expert either but thats what he said:) he also said try it yourself, sit your car at 86, watch where your foot sits on accelerator, now speed up to 100 and see how much more it sits down, heaps more apparently??
now the bloke i was talking to i did meet on the side of the road and he was driving a toyota coaster camper, if that gives him any credibility or not lol..
ben
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Ben, think you will find you will get better km's as the motor does not have to work as hard. :D
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ya recon?? bas?
well actually i dont use electric lockup cause its laboring a bit too much.
but its a bit too much work for me to put a standard diff back in to go to 5:2 ratio. althou id be able to tow a house up a tree and turn the tree into a tree house. hmmmm
ben
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ben, if your not using your o/drive and your not carrying a lot of weight you aren't gaining anything by having o/d. baz is right your revs would be around 2600 at 100 kph probably a more efficient area fuelwise and the t700 has a better ratio spread.Unless you've got gobs of power your overgeared.I have dually with 3.5 and t700 at 3.5 ton and will probably have to go back to 4.45 standard.
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i am using the o/drive i just dont use the lockup which gives you another 500 less revs at 100, i plan on putting the hot 400chev back in this van once i get around to fixing the motor so once i do that it will be perfect ratios.
with the overdrive the van sits about 2600 revs, with lockup about 2100. without the overdrive 3,500revs
cheers
ben