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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: zieg85 on June 15, 2020, 10:06:18 PM

Title: 1985 C30 TH400 transmission mount
Post by: zieg85 on June 15, 2020, 10:06:18 PM
I am trying to figure out what transmission mount I need.  With no one having these in stock to match up I fear ordering more of the same.  Pictured is the comparisons of mine top to the one sent me with part #2513 which is what everyone says it is supposed to be.
Title: Re: 1985 C30 TH400 transmission mount
Post by: bd on June 15, 2020, 11:51:37 PM
Try original GM 9767699 (https://www.ebay.com/itm/Transmission-Mount-GM-9767699-/322788475146) (Parts Group 4.081) or equivalent.  Although it crosses to the aftermarket 2513, the bolt spacing appears wider on the OE mount.
Title: Re: 1985 C30 TH400 transmission mount
Post by: zieg85 on June 16, 2020, 12:01:57 AM
Try GM 9767699 (https://www.ebay.com/itm/Transmission-Mount-GM-9767699-/322788475146) (Parts Group 4.081) or equivalent.

you the man!!! Thanks Rich
Title: Re: 1985 C30 TH400 transmission mount
Post by: bd on June 16, 2020, 12:05:20 AM
Carl, check the edited post.  The aftermarket crosses to 2513, but it looks to me like there is an error.
Title: Re: 1985 C30 TH400 transmission mount
Post by: zieg85 on June 16, 2020, 12:17:20 AM
I first put in an offer than I retracted it.  I sent the seller my pictures and asked that he measure it.  Autozone and others refer to 2513.  At least it doesn't fit mine...  Had a perfect cool night and I was planning on buttoning it up so I can get it back on the road after over a year up on ramps.  Oh well, there is a reason (my wife reminds me) that I got the wrong one... Still frustrating

Title: Re: 1985 C30 TH400 transmission mount
Post by: zieg85 on June 16, 2020, 11:30:50 PM
I spent several hours looking into this situation.  The only thing I can figure is that there are two types.  One is 3.75" center to center and the other is 4.25".  I messaged several vendors and the only one that messaged me back and actually took the time to measure it for me got the sale.  Anchor 2513 measures 4.25".  The one I returned, although it referenced Anchor 2513 in the auction and it was stamped 2513 made in the USA this one was 3.75" and slightly offset.  Both mentions the GM 9767699.  I also saw 3 different Anchor 2513, 1 made in Thailand, 1 in China and 1 in India....

Scratching my head on this one.....
Title: Re: 1985 C30 TH400 transmission mount
Post by: bd on June 17, 2020, 10:20:11 AM
The dimensional inconsistency between the OEM 9767699 and aftermarket 2513 has persisted since the 1980s, at least.  The 9767699 is a common mount for the M40 transmission, so the aftermarket continues to haunt the uninitiated with its non sequitur substitution.  Go figure....