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02-22-2015, 07:57 PM
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#1 |
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Registered User
Join Date: May 2011
Location: Anahuac Tx
Posts: 111
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Turbo 350 or 400 transmission ?
How do I know which tranny I have? It was a stock 305ci Silverado step side.
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02-22-2015, 08:15 PM
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#2 |
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Registered User
Join Date: Sep 2014
Location: Texas
Posts: 215
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Re: Turbo 350 or 400 transmission ?
Most likely a TH350 unless it is an overdrive 700R4. The transmission pan will be more or less square with a corner cut off for a TH350 and square for a 700R4 and roughly a Texas shape for a TH400. Lots of web sites with pics and pan shapes.
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02-22-2015, 08:34 PM
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#3 |
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Registered User
 Join Date: Oct 2011
Location: Brooklyn, New York
Posts: 137
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Re: Turbo 350 or 400 transmission ?
Do you have a sticker inside the glove box with RPO codes?
Does the gear shift indicator above the steering column have an overdrive option? What year is the truck?
__________________
1987 R10 1976 K10 |
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02-22-2015, 08:58 PM
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#4 |
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Registered User
Join Date: May 2011
Location: Anahuac Tx
Posts: 111
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Re: Turbo 350 or 400 transmission ?
1986. Based on the pan, I think it is a th350. The glove box sticker didn't help. Thanks for the advice.
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02-22-2015, 09:33 PM
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#5 |
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Registered User
Join Date: May 2011
Location: Anahuac Tx
Posts: 111
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Re: Turbo 350 or 400 transmission ?
Mx1 is what is shown in the glove box. Research agrees that I have a th350. I am ordering a TCI tranny from summit unless some one on here has some negatives about them to share.
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02-23-2015, 02:37 AM
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#6 |
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Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: Turbo 350 or 400 transmission ?
If its a weekend toy a turbo 350 is fine,If its a daily driver i would run a 700r4 because of the over drive.
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