og900 4spd gearbox ???'s
Posted: Fri Jul 27, 2007 3:56 pm
There's a '79 900T down here in the junkyard with a G44502 gearbox & since it's only 50 bucks I thought I'd get it to install down the road...I stuck a magnet down into the filler hole & no chunkies pulled out,the car has massive rear end damage so I guess that's why it's there...it has 230,000 miles...
the PROBLEM is when they moved the car with a forklift (it's a u-pull-it yard) they badly damaged the gearbox drain plug,it's still sealed,but half the shoulder got ripped off,I could probably drill the plug out,but is it possible (or wise) to try & weld the shoulders of the boss on cast aluminium & rethread it? Also I was curious if the untapped boss right behind the g.b. drain closer to the r. diff. cover could be tapped & used for the drain?
Since it's got the 5 primary,I'd like to change to 7(which I've found online),but I've heard of people using 5spd primaries...anybody got experience with this?
It's a 871 239 cast #,so I don't think it's the "strongest" of the "kokill" boxes which have the diagonal ribs...as Jörgen says here:
http://www.xn--kpslp-jra6j.nu/vaxellador.html
...which roughly translated is something like this...
1)The cast number is supposed to be 870423 or 871239,of these numbers there are many casts of different strength.You can say that all these housings are very strong,but if you want the strongest it is the one with 3 diagonal ribs on the forward right corner in the oilpan.
2)How to see if it's a strong cast is to look at the ribs on the right side of the trans-housing,they are horizontal,this is the easiest way to be sure.
3)The primary housing should have 3 strengthening ribs under the slave cyl. that is 1cm wide and with a distance of 3cm between each.If it's 3cm wide with 1cm between each,it's wrong.
also,a good thread is here:
http://www.900aero.com/phpBB2/viewtopic.php?t=1114
Any thoughts/opinions on running the 4spd boxes on uprated og 900's?
...my future project og900 will not be crazy-ass gnarly,but mildly tuned...I've liked the gearing on the coupla 99's I've driven,so if this setup would be similar,I think I'd diggit.
the PROBLEM is when they moved the car with a forklift (it's a u-pull-it yard) they badly damaged the gearbox drain plug,it's still sealed,but half the shoulder got ripped off,I could probably drill the plug out,but is it possible (or wise) to try & weld the shoulders of the boss on cast aluminium & rethread it? Also I was curious if the untapped boss right behind the g.b. drain closer to the r. diff. cover could be tapped & used for the drain?
Since it's got the 5 primary,I'd like to change to 7(which I've found online),but I've heard of people using 5spd primaries...anybody got experience with this?
It's a 871 239 cast #,so I don't think it's the "strongest" of the "kokill" boxes which have the diagonal ribs...as Jörgen says here:
http://www.xn--kpslp-jra6j.nu/vaxellador.html
...which roughly translated is something like this...
1)The cast number is supposed to be 870423 or 871239,of these numbers there are many casts of different strength.You can say that all these housings are very strong,but if you want the strongest it is the one with 3 diagonal ribs on the forward right corner in the oilpan.
2)How to see if it's a strong cast is to look at the ribs on the right side of the trans-housing,they are horizontal,this is the easiest way to be sure.
3)The primary housing should have 3 strengthening ribs under the slave cyl. that is 1cm wide and with a distance of 3cm between each.If it's 3cm wide with 1cm between each,it's wrong.
also,a good thread is here:
http://www.900aero.com/phpBB2/viewtopic.php?t=1114
Any thoughts/opinions on running the 4spd boxes on uprated og 900's?
...my future project og900 will not be crazy-ass gnarly,but mildly tuned...I've liked the gearing on the coupla 99's I've driven,so if this setup would be similar,I think I'd diggit.