Broke Tailshaft uni cant get yoke out

1076 Views 27 Replies 15 Participants Last post by Turbo304, 5 d ago

Turbo304

Discussion Starter · 10 d ago

2

Had a bit of a misshap at the track today Uni broke and smashed under side of my car to bits. Car has 2 piece tailshaft and a factory front loop that caught it, but it was flopping all over the place
Got car home and on the hoist.

For some reason i cant get the yoke out the back of the th400.
I have even given it a light tap with a soft face hammer but it only moves in and out 10mm or so.
I cant see any damage to the extension housing.
With car in neutral i can get yoke and turn one way by hand but not the other.

Anyone have any idea what happend and how i can get the yoke out?
I am worried that it may have push all the way in, bottom out in the trans when it broke or maybe twisted the splines in there. Thats why it wont come out?

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Hutch

· #2 · 10 d ago

Tailhousing is broken?

Driveshaft broke or U joint came apart?

Output shafts don't take much to bend if the tail broke.

Hutch

Bolt

· #3 · 10 d ago

Turbo304 said:
Had a bit of a misshap at the track today Uni broke and smashed under side of my car to bits. Car has 2 piece tailshaft and a factory front loop that caught it, but it was flopping all over the place
Got car home and on the hoist.

For some reason i cant get the yoke out the back of the th400.
I have even given it a light tap with a soft face hammer but it only moves in and out 10mm or so.
I cant see any damage to the extension housing.
With car in neutral i can get yoke and turn one way by hand but not the other.

Anyone have any idea what happend and how i can get the yoke out?
I am worried that it may have push all the way in, bottom out in the trans when it broke or maybe twisted the splines in there. Thats why it wont come out?

knock the rear seal out and maybe 🤔 you can use a bore scope to see the splines?🤔. Bottom line it’s got to come apart!

View attachment 481568 View attachment 481567 View attachment 481568

Reactions: 1

Nextgen classics

· #4 · 10 d ago

I would modify the yoke to accept a two jaw puller,then drill hole in yoke plug. Pull it off

Crosley

· #5 · 10 d ago

Wrap a chain around the yoke... Use a slide hammer?

If splines on the shaft are jacked up or bent , transmission needs to come out any way. Good luck

Turbo304

Discussion Starter · #6 · 10 d ago

Hutch this is how this model of car tailshaft should look.
Picture will probably tell 1000 words as they say

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Turbo304

Discussion Starter · #7 · 10 d ago

Chain around yoke with slide hammer is a good idea.
Some one else said to heat the yoke up also before trying to tap it off

Timbers68

· #8 · 10 d ago

Bigger Hammer.

Reactions: 1

Mi.5.0Fred

· #9 · 10 d ago

Turbo304 said:
Hutch this is how this model of car tailshaft should look.
Picture will probably tell 1000 words as they say
View attachment 481579

Most people call the output shaft in the trans the Tailshaft. You are showing us the driveshaft or sometimes people call it the Propshaft.
‘I would take my big airchiesel with a short flat hammer bit and try to move it.

Reactions: 1

Turbo304

Discussion Starter · #10 · 10 d ago

Mi 5.0 fred im not in usa
So just difrent wording terminology say.
Lots in translation lol

LarryO

· #11 · 10 d ago

Happen at Calder yesterday?

18degsbcregal

· #12 · 9 d ago

Try unbolting the tailhousing and taking it all off in one shot. Then you’ll know if the yoke is wedged up into the tailhousing, or if the output shaft is bent.

Reactions: 1

Turbo304

Discussion Starter · #13 · 9 d ago

Yeah larryo were you there?
18degsbcregal i was thinking of doing that and using my inspection camera to have a look

Topfun99

· #14 · 9 d ago

I'd bet the splines are twisted. On my AOD I twisted the splines with a Spicer, then a Strange "billet" yoke before finally buying a Mark Williams unit that has held up for 13 years. When they twisted I never knew until it was time to remove the driveshaft. After I unbolted the driveshaft at the rear, I couldn't get the driveshaft to move forward to take it out. I had to unbolt the rear end from the chassis and move it back enough to pull the driveshaft.

I suspect your splines were twisted awhile ago and you never knew. When the driveshaft broke it forced the yoke forward enough to really jam it up.

Turbo304

Discussion Starter · #15 · 9 d ago

Topfun99 that could have happend to me. But im only around 650hp at the engine suprise it could do that to the yoke with such little power and only on a small 255 60 15 tyre

Top355x

· #16 · 8 d ago

Air chisel with Texas hook

Top355x

· #17 · 8 d ago

Texas Twister is the correct name made by Milton

Reactions: 1

LarryO

· #18 · 8 d ago

Turbo304 said:
Yeah larryo were you there?

Not for very long

Reactions: 1

onslaught

· #19 · 8 d ago

Turbo304 said:
Topfun99 that could have happend to me. But im only around 650hp at the engine suprise it could do that to the yoke with such little power and only on a small 255 60 15 tyre

Whats the combo?

Turbo304

Discussion Starter · #20 · 8 d ago

Onslaught just a crate lsa motor.
Tried to slide hammer it today with china slide hammer.
China slide hammer 0
Old busted yoke 1

Spoke to my trans guy he said to pull trans bring to him.

Thanks for the tips guys

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