Automatic transmission Question
Thread Starter
Intermediate
Joined: May 2009
Posts: 43
Likes: 0
From: NZ
Automatic transmission Question
A sub-standard transmission shop performed an overhaul of auto on my car before I bought it. They didn't install long enough bolts to hold the tail housing on. The tail housing opened up about 1/4" leaking the fluid out. 3 of the 4 bolts were about 3/4" too short! They must have lost them and thought it wasn't that important. The aluminium from the transmission housing stayed on the threads of the bolts and they able to be pulled out with my fingers without turning them. I am in the process of installing heli-coils to the 3 damaged threads of the housing.
QUESTION. Now that I have removed the tail-housing I have noticed quite alot of "play" in the tailshaft, is this normal.
Thanks Guys
Ryan, New Zealand
QUESTION. Now that I have removed the tail-housing I have noticed quite alot of "play" in the tailshaft, is this normal.
Thanks Guys
Ryan, New Zealand
Burning Brakes
Joined: Sep 2005
Posts: 993
Likes: 3
From: Iowa
It's been more than a few years since I was building those transmissions but if I recall correctly the output shaft doesn't have a crazy tight bearing holding it in place like a manual trans does. Someone that's been inside one within the past decade should be able to confirm this or set us straight.
Thread Starter
Intermediate
Joined: May 2009
Posts: 43
Likes: 0
From: NZ
I hope it's not damaged. I'd like to have some good news with this car for a change. I want to bolt it back together, and if it's good, I'll treat it to a new cat-free exhaust seeing as its off.
Instructor
Joined: Feb 2014
Posts: 139
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From: Lakeland FL
) around.
Race Director
Joined: Apr 2003
Posts: 17,699
Likes: 1,667
From: moraga ca
I was concerned about that years ago when I started playing with these trannies. The output shaft does have a lot of play, and as stated above, the bushing in the tailshaft keeps it in place. The tailshaft bolts do come in two lengths depending on the tailshaft. I've seen both lengths also. Obviously, you want the longer one.
Team Owner
Joined: Sep 2003
Posts: 25,384
Likes: 2,736
I believe the extension housing bolts are M10X1.5 and 35mm long for the 700R4. Does that dimension match your one good one? With the extension housing already removed the bushing should be a very straight forward replacement by a shop. If you buy a "seamed" bushing make sure the seam is at 12:00 when installed.
Good luck. I'd think you'll be fine.
Good luck. I'd think you'll be fine.
Race Director
Joined: Apr 2003
Posts: 17,699
Likes: 1,667
From: moraga ca
I believe the extension housing bolts are M10X1.5 and 35mm long for the 700R4. Does that dimension match your one good one? With the extension housing already removed the bushing should be a very straight forward replacement by a shop. If you buy a "seamed" bushing make sure the seam is at 12:00 when installed.
Good luck. I'd think you'll be fine.
Good luck. I'd think you'll be fine.
The op appears to be referring to the movement of the output shaft with the extension housing removed.
Thread Starter
Intermediate
Joined: May 2009
Posts: 43
Likes: 0
From: NZ
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Thread Starter
Intermediate
Joined: May 2009
Posts: 43
Likes: 0
From: NZ
M10 X 1.5 is the bolt that is required. I may have exaggerated a bit in my original post. The long bolt is 40mm and the 3 short ones are 30mm in length. There is no way the short ones were a stock bolt. There is more than 10mm of un-damaged available thread inside the transmission housing. I'll measure that next.