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03-23-2016, 10:45 AM
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#1 |
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Registered User
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
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TH400 Leak
Hey Guys,
I have a TH400. I have a transmission leak that looks to be coming from the Speedo Cable sending unit... Does anyone know if this is just an O-ring problem or how to fix it? |
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03-23-2016, 05:09 PM
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#2 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: TH400 Leak
it will have an oring on the outer part of the housing and a seal were the gear comes through the housing. Either one of those could be leaking.
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68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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03-23-2016, 11:40 PM
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#3 |
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Chance
 
Join Date: Sep 2001
Location: Belcourt ,ND, USA
Posts: 750
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Re: TH400 Leak
Check to make sure the speedo gear itself isn't hallow all the way through.
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1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400 |
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03-24-2016, 10:23 AM
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#4 | |
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Registered User
Join Date: May 2012
Location: Faith,NC
Posts: 1,626
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Re: TH400 Leak
Quote:
Not to high jack but, this might help the OP. Does anyone have part numbers for these O rings or know where to buy them? |
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03-24-2016, 01:37 PM
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#5 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: TH400 Leak
Gm part number for the inner was 1240382 and the outer I believe is a 15562374. Not sure if they are still available from gm or not.
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68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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03-24-2016, 03:17 PM
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#6 |
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Registered User
Join Date: Apr 2014
Location: West Jordan, UT
Posts: 189
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Re: TH400 Leak
Wow. Thanks guys! You are all awesome! I'll check and see if I cant get manufactured O-Rings. If not, I'll figure something else out. I really appreciate your willingness to help to the extent of even getting me part numbers!
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