Author Topic: Gearbox (Read 4684 times)

paul harbinson. · « **on:** March 25, 2006, 08:26:51 AM »

Ok chap's would anybody know if an aircooled gearbox fit a bis?I think it might but I'd like some of your input please as I have a sick bis at my house.

Chris Lakin · « **Reply #1 on:** March 25, 2006, 11:25:35 AM »

hi Paul you have a sick BIS? yours?

http://www.fiat126.info/specs.html

look at the above paul under transmition, the BIS clutch has a bigger diaphragm.

but what about the really late FSm aircooleds? must be same gearbox? was produced at the same time wasnt it.

regards

Chris

Darkhorse · « **Reply #2 on:** March 26, 2006, 08:34:39 AM »

Sorry paul, the bellhousing is completely different on the bis due to the flat engine layout, however the gearbox itself is virtually identical and will fit its just the mounting bushes on the side of the bis gearbox don't exist on the 126.

paul harbinson. · « **Reply #3 on:** March 27, 2006, 07:41:09 AM »

No Chris not mine mate,I think i've become Doctor Dolittle (he talk's to baby FIAT's) :wink: Thank's for that Darkhorse so if I swap the bell housing's over it should do the trick?Can the bell housing split or is it part of the casing?(Hope it's the former and not the latter).

Darkhorse · « **Reply #4 on:** March 27, 2006, 07:53:39 AM »

Pual you'll be happy to know tha casing does come off so yes you should be able to just swap the boxes and for a guy of your calibre I can't imagine that you'll have any problems

paul harbinson. · « **Reply #5 on:** March 27, 2006, 08:10:09 AM »

You'd be surprised,multi valve engine's no prob's.handy job like the gearbox you can be sure it'll go pear shaped :lol:Thank's again mate for the advise :wink:

PaulB · « **Reply #6 on:** March 27, 2006, 01:05:23 PM »

a few things to take into account...

crown and pinion different on aircooler giving higher torque, but lower speed. Your BIS will climb cliffs but you'll be changing up sooner and will have a lower top speed. You can swap crown and pinion, though I've never tried it so can't say how much hassle it is. if you are going to do that, it would probably be as well to just repair the BIS box?

the aircooler box may not have a reverse light if this matters to you.

Bruce · « **Reply #7 on:** March 27, 2006, 01:55:49 PM »

the gearbox is fairly easy to rebuild, i quite easily managed to make a good gearbox for my deville by combining the best bits from 2 boxes; take both boxes apart, put all the bits in a box sort them into pairs and then select the best bits from each pair, then just put them back together, the picture in the haynes manual is a good guide.

paul harbinson. · « **Reply #8 on:** March 30, 2006, 08:14:01 AM »

Got her done lad's thank's for they invaluable advice good job.Used the finial drive from the air cooled in the end(would have had to change the pinion as well and time was a comodity I did'nt have too much have).Started it at six and had it back off the ramp just after eight.Run's the best.again chap's thank's for the input. :wink:

PaulB · « **Reply #9 on:** March 30, 2006, 08:36:53 AM »

If your BIS crownwheel and pinion are going spare....

paul harbinson. · « **Reply #10 on:** March 30, 2006, 01:51:31 PM »

Yea no prob's.I'll go and pull it out of the skip.