Twin Spark gearbox on 3ltr 75
Posted: Tue Jul 05, 2011 6:27 am
Hi everyone ...
There are a number of good forums for Transaxle Alfas, so forgive me if i break any rules by posting the same thing to each of them... Please let me know if it's an issue.
I recently posted this in a local Alfa Club forum and here in Australia and the ABB, but I thought I should cast the net a little winder hence I’m posting here too ….
I’m having a problem that is really causing me some grief …
Background
The gearbox on my son's 3ltr 75 was a mess - gears crunching, bearing noises, etc
His clutch went recently and given the condition of the box, we thought while the clutch was being fixed, we should drop the box and rebuild it too.
The average quote he got was $2000 to $2500 plus a few months wait for it to be done.
Given he has a new baby on the way and funds a little tight, as a short term solution, I offered him my spare Twin Spark gearbox until he gets around to rebuilding the 3LTR one.
while installing the TS box, we encountered 3 main issues.
1) The wheel hubs have larger bolts on the 3ltr, so I also gave him my spare Twin Spark A frame.
2) We could not use the TS clutch assembly because the donut flanges are smaller than the 3ltr ones, therefore we used the 3ltr clutch assembly to ensure it would bolt up to the lager donuts.
3) The 3ltr clutch is Pull type, so we had to change over the pivot pins where the thrust bearing fork pivots on.
It seems pretty much straight forward, a little bit of work, but it all seemed to go together ok.
Issue
1) We have everything bolted up and looking ok, except I can’t seem to bleed the clutch slave cylinder. I tried the usual tricks, like pushing it backward, (in case there is air towards the front of the cylinder), but it still want come hard.
I’m worried, because I can’t see air coming out of the bleeder, yet the pedal goes straight to the floor and won’t come up.
I did manage to get it working at one stage, maybe 80-90% expected pedal feel, but then while trying to get the last 100%, I played with the bleeder and it went flat again.
Is there something I’m missing with this?
2) has anyone else put a TS box on a 3 litre 75?
Thanks in advance
Sam __________________
There are a number of good forums for Transaxle Alfas, so forgive me if i break any rules by posting the same thing to each of them... Please let me know if it's an issue.
I recently posted this in a local Alfa Club forum and here in Australia and the ABB, but I thought I should cast the net a little winder hence I’m posting here too ….
I’m having a problem that is really causing me some grief …
Background
The gearbox on my son's 3ltr 75 was a mess - gears crunching, bearing noises, etc
His clutch went recently and given the condition of the box, we thought while the clutch was being fixed, we should drop the box and rebuild it too.
The average quote he got was $2000 to $2500 plus a few months wait for it to be done.
Given he has a new baby on the way and funds a little tight, as a short term solution, I offered him my spare Twin Spark gearbox until he gets around to rebuilding the 3LTR one.
while installing the TS box, we encountered 3 main issues.
1) The wheel hubs have larger bolts on the 3ltr, so I also gave him my spare Twin Spark A frame.
2) We could not use the TS clutch assembly because the donut flanges are smaller than the 3ltr ones, therefore we used the 3ltr clutch assembly to ensure it would bolt up to the lager donuts.
3) The 3ltr clutch is Pull type, so we had to change over the pivot pins where the thrust bearing fork pivots on.
It seems pretty much straight forward, a little bit of work, but it all seemed to go together ok.
Issue
1) We have everything bolted up and looking ok, except I can’t seem to bleed the clutch slave cylinder. I tried the usual tricks, like pushing it backward, (in case there is air towards the front of the cylinder), but it still want come hard.
I’m worried, because I can’t see air coming out of the bleeder, yet the pedal goes straight to the floor and won’t come up.
I did manage to get it working at one stage, maybe 80-90% expected pedal feel, but then while trying to get the last 100%, I played with the bleeder and it went flat again.
Is there something I’m missing with this?
2) has anyone else put a TS box on a 3 litre 75?
Thanks in advance
Sam __________________