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Old 11-12-2017, 12:49 PM   #1
KSCHEVYUP
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Auto Trans mount differences

Need some input and opinions.
I have a 1972 1 ton with a 4 speed and am wanting to convert to TH400 automatic that came out of a 1969 C10.
My question is
Are the 1/2 and 3/4 auto transmission cross members the same and interchangeable to use on a 1 ton frame.
Heehawracing has some spacer brackets on parts board that came off a 1 ton Longhorn and I am wanting to know if this will work with my 1/2 ton cross member?
Thanks for your input
Ron
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Old 11-12-2017, 01:34 PM   #2
Rufas
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Re: Auto Trans mount differences

Quote:
Originally Posted by KSCHEVYUP View Post
Need some input and opinions.
I have a 1972 1 ton with a 4 speed and am wanting to convert to TH400 automatic that came out of a 1969 C10.
My question is
Are the 1/2 and 3/4 auto transmission cross members the same and interchangeable to use on a 1 ton frame.
Heehawracing has some spacer brackets on parts board that came off a 1 ton Longhorn and I am wanting to know if this will work with my 1/2 ton cross member?
Thanks for your input
Ron
Good question. I have a 70 GMC 3/4 ton that has a 3/8 spacer between the trans mount and the transmission. I'm currently fighting excessive driveline issues. Maybe a 1/2 cross member might help?

Not trying to steal this thread, but nice to know of different cross members effect driveline angles.
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Old 11-12-2017, 04:40 PM   #3
LockDoc
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Re: Auto Trans mount differences

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I think this is what you need....

http://67-72chevytrucks.com/vboard/s...d.php?t=750325

If HeeHaw's spacer brackets look like those they should work also.

LockDoc
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