Alfa Romeo Forums banner

1 - 12 of 12 Posts

·
Premium Member
Joined
·
215 Posts
Discussion Starter #1
I am back at doing some major work on my car, it developed a rattle coming from the bell housing.
Looks like the pilot bushing is shot, while im in there im going to to replace the clutch/PP/TO bearing, pilot bushing.
Since I had the trans out I wanted to go head and replace the synchro rings and do the first gear fix.

I have the trans apart on my table, I took it over to a mechanic friend of mines to get his opinion on the subject. Bearings and gears look great, dogs arent eaten apart. But the inner/outer synchro's could use a refresh since im in there (though I haven't had any shifting issues). Ive never pulled gears of a shaft like this, im not opposed to going to harbor freight and getting a 20 ton press, heat gun and bearing puller set to pull the gears off.
Ive read Vintre's thread and watched Jethro Bronner's video a multitude over. I talked to my mechanic friend (a classic triumph mechanic) and his concern was bending the shaft with the press, he personally didnt feel comfortable using his 12T press to do the job.

In my area finding someone who is willing to even look at an Alfa part is rocket surgery...When I had to get my head rebuilt I had to take it to a British car specialist 100 miles away (shop owner had a spider just like mine!), If my trans needed a rebuild and had damage that needing repair, I would be fine with that. But for preventative and "while im in there work" it feels a bit excessive to take time off work etc to do this.

How likely is it to bend a shaft? What concerns should I have about maybe giving this a shot?
I have the workshop manual, many pictures I took, and of course Vintres thread for reference, im just a bit afraid of screwing up a good transmission shaft.
Thoughts?

Thanks in advance as always,
Aaron
 

·
Premium Member
Joined
·
1,577 Posts
You will have less of a chance of bending the shaft than you will of bending one of the tripod arms when you are pressing gears on and off the shaft. Just get a decent bearing splitter, and a metal tube with an OD slightly larger than the shaft diameter (so that you aren't pressing against the tripod tips) and you will be fine.
 

·
Premium Member
Joined
·
215 Posts
Discussion Starter #4
We must have gone to the same school: If it is not broken -fix it until it is.

Mark
I just know that everytime I have a questionable shift..or if it does start to find, im gonna kick myself in the tail!

I took the plunge and just did it, after reading Vintres thread one more time. Then one more time after that.
I went to good ole harbor freight, got a bearing splitter, heat gun, and a 20ton press.

And here is the result. Now I wait on the new parts to arrive.
 

Attachments

·
Registered
Joined
·
5,485 Posts
Measure EVERYTHING. All of the bushings in all the gears, shaft OD, check for chipped teeth off dog rings, etc. in other words, do a full job while you can. I always replace the input shaft bearing, 3/4 and 5th needle bearings. You are building a precision gearbox - Dont scrimp!!! If you do a precision job, it will outlast you most likely. And, you are already 1/3 to 1/2 of the way there! PS — cleanliness is KEY! Use a soft cotton towel from goodwill and a few cans of brake cleaner on everything.
 

·
Premium Member
Joined
·
215 Posts
Discussion Starter #6
Oh for sure, I don’t want to do it again !
 

·
Premium Member
Joined
·
215 Posts
Discussion Starter #7
Question-
Does the dog teeth ring on 1st have to be changed out for a 2-5th ring that only has one slot?
 

·
Premium Member
Joined
·
215 Posts
Discussion Starter #9
I wasn’t sure if the dog ring mattered or not, cause mine is in great shape and the slot looks to match the same as the other gears. There’s just one extra slot
I know the internals have to change.
The reason I ask is, I had planned on removing the 2nd dog ring and putting it on 1st, and putting a new one onto 2nd. But the 2nd dog ring busted around the snap ring when I was pressing it off.
I don’t mind ordering another from APE, but if I’m trading like for like...
 

·
Premium Member
Joined
·
4,528 Posts
But the 2nd dog ring busted around the snap ring when I was pressing it off.
You must have not read the other trans rebuilding threads.

DO NOT USE THE SNAP RING TO PRESS OFF GEARS.

Install the bearing splitter into the ring groove and tighten up with wrenches. Then press it off.
 

·
Richard Jemison
Joined
·
7,382 Posts
For 50 years I have used the snap rings to press off syncro carriers. I`m just careful t not put pressure in the area of the opening and tighten the clamps on the bearing remover.
 

·
Premium Member
Joined
·
215 Posts
Discussion Starter #12
I believe thats what I did Richard, I put the splitter around the snap ring. I tightened it up It still broke, whereas the first gear dog popped off without effort at all....
The groove is what broke, 1/3 of the groove is sitting below my shop press all by its lonesome no near the dog teeth it was married too
 
1 - 12 of 12 Posts
Top