TH350 Auto Box Front Yoke play ???

[maxuk15]

Hi All,
How much play should there be on the front yoke that connects the TH350 auto box to the drive shaft ?
There seems to be a fair bit which means that when selecting drive you get a "klonk" as it engages !!!
Would like to get a smoother engagement.
And is it a 31 spline or 32 spline ??

Cheers
Steve

 

[mickn]

My 73 has always 'klonked' when engaging drive or reverse, had it for nearly 19 years and it's always done it, changes seamlessly when driving

 

[Nick B]

It's highly likely that the rear 'snubber' cushion needs replacing, cheap and easy to do.

1963-1982 Corvette Rear End Cushion (snubber) Replacement Instructions | Willcox Corvette, Inc.

Corvette Parts, Service and Sales 800-588-3883 Orders Rear End Cushion Replacement. (snubber) Do you hear a thump when you move your car from reverse to forward? If so, odd’s are your rear end cushion (snubber cushion) needs replaced. This cushion … Continue reading →

repairs.willcoxcorvette.com

 

[mickn]

It's highly likely that the rear 'snubber' cushion needs replacing, cheap and easy to do.

1963-1982 Corvette Rear End Cushion (snubber) Replacement Instructions | Willcox Corvette, Inc.

Corvette Parts, Service and Sales 800-588-3883 Orders Rear End Cushion Replacement. (snubber) Do you hear a thump when you move your car from reverse to forward? If so, odd’s are your rear end cushion (snubber cushion) needs replaced. This cushion … Continue reading →

repairs.willcoxcorvette.com

I don't know about Max but you have to remember you are talking to someone who would struggle to re-fit a bicycle chain here

 

[Nick B]

I don't know about Max but you have to remember you are talking to someone who would struggle to re-fit a bicycle chain here

It really is easy though, I've done it.

 

[Oneball]

Shouldn’t really be any play. Which direction is the play? That should give you an idea of what the problem is.

 

[maxuk15]

Cheers guys, Yes Nick it's a very do-able job in my eyes .
The play in the yoke is felt when you move the driveshaft by hand !!
So that's why I think the excess play is in the Yoke. It is a nearly 40 year old car !!!!
I will check the end cushion play when next under the car .

It's normally in drive the play Mr B.

Max

 

[Oneball]

Is the play rotational, forwards/backwards or left/right.

 

[maxuk15]

Cannot remember at the moment !!!
But looking in the workshop manual (1981) I have it talks about rotating the front Yoke 180 degrees and coating the the auto box shaft with "White Lead" presume paste to reduce the klonk.
Anyone heard or done this ??