Author Topic: Turbo 475 Transmission  (Read 4004 times)

Offline okiewelder1973

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Turbo 475 Transmission
« on: February 13, 2011, 09:20:54 PM »
I have an 85 C20 crew with a turbo 400.  Will the 475 be a direct fit?  I saw one on craigslist.

Offline slammed79

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Re: Turbo 475 Transmission
« Reply #1 on: February 13, 2011, 10:40:38 PM »
I've never heard of a 475 transmission
74 C10 Long bed 350/SM465 Lowered on 20's

Praise the lowered

Offline Blazin

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Re: Turbo 475 Transmission
« Reply #2 on: February 13, 2011, 11:23:05 PM »
TH475 is the same as a TH400 externally. Most of them had a drum emergency brake on the tail shaft as they were used in motor homes, C50 or bigger trucks, and busses. Might run into drive shaft issues if the drum brake is present. Internally they are different. They have strait cut gears instead of angled or sun cut. They are much stronger. They tend to have a whine noise when running down the road because of the strait gears.
« Last Edit: February 14, 2011, 05:55:41 AM by Blazin »
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Offline slammed79

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Re: Turbo 475 Transmission
« Reply #3 on: February 14, 2011, 12:53:14 AM »
Learn something new every day. Thanks Blazin!
74 C10 Long bed 350/SM465 Lowered on 20's

Praise the lowered

Offline okiewelder1973

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Re: Turbo 475 Transmission
« Reply #4 on: February 14, 2011, 03:58:23 PM »
Ya, I'm waiting on the seller to get back with me on it.

Online VileZambonie

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Re: Turbo 475 Transmission
« Reply #5 on: February 14, 2011, 04:45:12 PM »
What's wrong with your TH400?
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1974 GMC

Offline okiewelder1973

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Re: Turbo 475 Transmission
« Reply #6 on: February 14, 2011, 04:52:13 PM »
I know it needs a rebuild close to 200k on it and I saw this one that has already been rebuilt and the guy wants $450 for it.  To have the 400 redone will be $700, I can get a solid kit for $200.  I've built many engines but never a tranny and I'd hate to screw it up the first time out.

Offline Irish_Alley

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Re: Turbo 475 Transmission
« Reply #7 on: February 15, 2011, 03:41:28 AM »
when did you get the truck? just cause the odom might say something close to 200k dont mean that the trans seen that could of been replaced at 150k with trans i run them till they blow lol
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth?~Sherlock Holmes

Offline okiewelder1973

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Re: Turbo 475 Transmission
« Reply #8 on: February 15, 2011, 01:56:03 PM »
I know the guy I bought it from...never had a rebuild.  I hear ya on driving it till it blows...don't wanna be in the boonies when that happens.

Offline Irish_Alley

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Re: Turbo 475 Transmission
« Reply #9 on: February 16, 2011, 10:29:15 AM »
That's what friends are for lol ::)
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth?~Sherlock Holmes

 


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