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Old 06-03-2011, 07:34 PM   #1
jonzcustomshop
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auto trans install?

putting a th350 in one of my trucks, does the center crossmember (under the flywheel) have to be removed, or will the trans fit by it?
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Old 06-03-2011, 08:03 PM   #2
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Re: auto trans install?

It will be easier to get the tranny in and out if you remove it. You also might have fitment problems. Just grind down the rivits and punch them out.
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Old 06-03-2011, 08:41 PM   #3
jonzcustomshop
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Re: auto trans install?

yeah.. thought so .... more work!

hey- has anyone found a driveshaft that is a bolt in for a longbox auto install?
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Old 06-04-2011, 01:25 AM   #4
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Re: auto trans install?

I would definitely remove the bellhousing crossmember.

The length of the driveshaft will vary with the length of the tailshaft on the trans. I believe there are 3 length for the TH350. If it were me, on a long bed, I would stick with a 2 piece.
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Old 06-04-2011, 03:49 AM   #5
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Re: auto trans install?

I agree with the Captain. The TH350 will fit with the original crossmember in there, you'll be a lot happier with it removed. It is a pain to take out, though.

Last edited by SFTorange; 06-04-2011 at 03:49 AM.
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Old 06-04-2011, 07:20 AM   #6
jonzcustomshop
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Re: auto trans install?

hey sft I see you look to have a th350 what did you do for the drive shaft?

my th350 will be out of a 79 transam, not sure which of the 3 lengths that one is..
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Old 06-04-2011, 08:54 AM   #7
badblu97
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Re: auto trans install?

Mine had the 3 speed(LWB), I put a TH350, and the drive shaft fit....Now that I think about it, I guess that doesnt help any...sorry
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Old 06-04-2011, 10:45 AM   #8
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Re: auto trans install?

Hi Jon,

When I had the turbo 350, I just had the driveshaft cut down to fit. I wish I had an easier, cheaper solution.
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Old 06-04-2011, 03:04 PM   #9
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Re: auto trans install?

If you know someone with good welding skills and a mig welder you can shorten the shaft yourself. Balance it when finished, cost is about 40 dollars but worth every peny.
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Old 06-04-2011, 03:08 PM   #10
jonzcustomshop
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Re: auto trans install?

Quote:
Originally Posted by badblu97 View Post
Mine had the 3 speed(LWB), I put a TH350, and the drive shaft fit....Now that I think about it, I guess that doesnt help any...sorry
no that does make sense, the lwb 3 speed shaft is shorter than the 4...
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