drive shaft question

farkamhall · Post by **farkamhall** » Wed Jul 16, 2008 1:17 pm

hi all, when fitting a red 186 and trimatic into FB, what drive shaft would be needed to fit the original diff, or would one have to be made up for it? thanks guys.

FB MAD · Post by **FB MAD** » Fri Jul 18, 2008 11:41 am

G'day Fark,

Haven't done 186/trimatic to FB.

I think Trev runs 179/trimatic so maybe Trev might be able to answer your question.

I'd imagine that the 186/tri combo would be longer than original grey/3 speed combo so I'd guess that it would be a matter of shortening your original shaft to suit if that were the case.

Don't know if the spline in the original FB front yoke will slide into the tri output shaft or not.

I would recommend a diff ratio change with 186/tri as the orig 3.89 FB diff screams at highway speed.

I run a 149 red ( bored out to 167 cubes though) and 3 speed manual with 3.08 red motor centre and it still gives me enough power to drive around town OK and some good legs on the highway with added better fuel economy.

Depends on what kind of driving/economy you want to have i guess.

I've got a 138 red and trimatic combo in the shed so can measure the length of them if that helps.Can also see if FB tailshaft front yoke will slip into trimatic output shaft if you want.

farkamhall · Post by **farkamhall** » Fri Jul 18, 2008 11:49 am

hi FB Mad, many thanks and yes, the measurements would be helpful as i do not have a drive shaft available. we are putting in a 186 if that helps.thanks again.

kevin · Post by **kevin** » Fri Jul 18, 2008 1:23 pm

the words LC/LJ torana come to mind

Trev · Post by **Trev** » Fri Jul 18, 2008 2:34 pm

Kevin is rite, I have a LJ Torrie one in my 186/tri, but it has a HR diff.
I'm pretty sure the yolk will fit from grey box to trimatic, well I havn't had a problem, Trev

.

matches · Post by **matches** » Fri Jul 18, 2008 3:43 pm

will lx/lh fit? i read somewhere on here to use a ek auto shaft with a manual trans yolk, this about right?

kevin · Post by **kevin** » Sun Jul 20, 2008 11:19 am

something i just thought of matches if yor car has a red motor and trimatic, the tailshaft you have if there is one should fit

farkamhall · Post by **farkamhall** » Sun Jul 20, 2008 3:27 pm

Thanks everyone, sorry kevin but i do not have a tail shaft at all. looks like the Torana option would be the best.

matches · Post by **matches** » Sun Jul 20, 2008 10:42 pm

mines got 186 hydra unfortunately. well i think it is. should probably stop drooling over finally having one and check properly. can you fit a hydra up to a red 186?

mrs ratbox · Post by **mrs ratbox** » Sun Jul 20, 2008 10:55 pm

you can but i don't know why you would
if you can get a couple of pics we'll soon ID it

matches · Post by **matches** » Mon Jul 21, 2008 9:03 am

do hydromatics have a three bolt torque converter?

mrs ratbox · Post by **mrs ratbox** » Mon Jul 21, 2008 12:19 pm

hydromatics don't have a torque convertor unless it's a turbo hydramatic more commonly refered to as turbo 350/400 if it's one of these you'de have an adaptor plate, so i'm pretty sure you have a trimatic which if yor going to use an ausie 4 speed is good for you as t/shaft, gearbox crossmember and speedo cable are all interchangeable between the 2
unless you have a powerglide 2 speed auto then speedo cable is different

matches · Post by **matches** » Mon Jul 21, 2008 1:03 pm

okay cool thanks RB, i'll have a look next time i get to the car, does a powerglide need a custom made crossmember?

matches · Post by **matches** » Mon Jul 21, 2008 10:03 pm

ratbox: i got my dad to have a look at it for me and we got some numbers off it. it has 4-2 then under that it has 5258485. any ideas?

mrs ratbox · Post by **mrs ratbox** » Mon Jul 21, 2008 10:36 pm

no i'm not that smart No's mean nothing to me

but i can look at things and know what they are, i'de say it's a tri, doesn't matter what gearbox is in it unless it's an original 3 speed man or a hydro it will have a custom made cross member