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Transmission to Cross Support
Posted by: Frog ()
Date: April 29, 2022 07:29PM

From Clark’s catalog:

TRANSMISSION TO CROSS SUPPORT: SOLD AS A FULL SET "GR 8". Set includes all necessary bolts & LW. All 4 oz./set.
(Does Not include any special spacers or shims).
1960-65 Std (3 bolts, 3 LW): C6891

Each diagram I’ve seen of the cross support as it’s attached to the transmission shows FOUR bolts. Well, it doesn’t exactly show four bolts, it shows ONE bolt, but has those dashed lines representing where they all go. I called Clark’s and the parts guy said that the three-bolt set is what’s used--2 x 5/16” and 1 x 3/8”. I checked the bolt size on the front of the transmission and sure ‘nuff, two were for 5/16” and another was for the 3/8” bolt, but there was also a place for a fourth bolt.

I’m really baffled as to why they’d call for three bolts when there is space for another; especially considering what the support does.

“I know what you’re thinking” (Thomas Magnum of Magnum, P.I.). When I removed the cross support, why didn’t I just reinsert the bolts-however many there were—into the appropriate location for future use?

Bolts shown are from Clark’s catalog. Diagram is from the shop manual.

Please set me straight.

Rob Lane
Clayton, in the Northeast Georgia Mountains.
1964 500 Coupe
Purchased by me in April of 1964.

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Re: Transmission to Cross Support
Posted by: Timothy Shortle ()
Date: April 29, 2022 09:04PM

I am not sure of your question but here is what I do know. The 64 3 speed manual transmission and the automatic transmission both used 4 (3/8 thread size) bolts to hold the crossmember to the transmission. The 4 speed had 3 bolts- 2 3/8s and 1 7/16. No transmission used 5/16 bolts (too small). What transmission does your car have?

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Re: Transmission to Cross Support
Posted by: RexJohnson ()
Date: April 30, 2022 04:43AM

'61 thru '5 4sp used 3 bolts, (1) 7/16" and (2) 3/8". ALL other transmissions used (4) 3/8" bolts. On the early 4sp there is a 1/4" spacer between the trans and crossmember on the 7/16" bolt.

RJ tools
Salem,Oregon

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Re: Transmission to Cross Support
Posted by: Frog ()
Date: May 03, 2022 04:53PM

Timothy and Rex, you nailed it for me.

As you both stated, my '64 3-speed transmission took four 3/8-inch bolts.

Thank you.

Frog

P.S.
Please, completely disregard my convoluted question.

Rob Lane
Clayton, in the Northeast Georgia Mountains.
1964 500 Coupe
Purchased by me in April of 1964.

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Re: Transmission to Cross Support
Posted by: joelsplace ()
Date: July 28, 2022 09:19AM

So I'm missing the spacer and I can't seem to put my hands on one that I know is correct. Clark's says they are 3/8" thick, Rex says 1/4". Does anyone have one they can measure? I have one here that might be right but it is a little over 3/8".

Joel
Northlake, TX
5 Ultravans, 136 Corvairs and counting...

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Re: Transmission to Cross Support
Posted by: joelsplace ()
Date: July 28, 2022 09:35AM

I found where Ken says 5/16"

Joel
Northlake, TX
5 Ultravans, 136 Corvairs and counting...

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Re: Transmission to Cross Support
Posted by: RexJohnson ()
Date: July 28, 2022 10:27AM

Bolt the crossmember on with the (2) 3/8" bolts and you should be able to measure the gap you need to fill for the 7/16" bolt.

RJ tools
Salem,Oregon

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Re: Transmission to Cross Support
Posted by: joelsplace ()
Date: July 28, 2022 10:31AM

I should be able to but the support was bent. I straightened it but I don't know if it is 100%.

Joel
Northlake, TX
5 Ultravans, 136 Corvairs and counting...

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Re: Transmission to Cross Support
Posted by: wittsend ()
Date: July 28, 2022 05:59PM

Those bolts (at least on am EM Powerglide) use shims (not showing in the illustration) to adjust rear toe (see image). The shims are one piece for both bolts per side. In the case of Joel needing a spacer, like Rex said bolt it together and the obvious will be apparent. If the support is bent the "correct" size might not be ideal anyway.

------------------------------------------------------------------------------

***'61 Lakewood, a "Freebie" in hibernation for 27 years - In the process of applying CPR.***

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Re: Transmission to Cross Support
Posted by: JimBrandberg ()
Date: July 28, 2022 07:33PM

This thread has shifted gears.
Frog was talking about a 3 speed that has 4 bolts and shims.
Joel was talking about a 4 speed with 3 bolts. 2 of the bolts use the shim and the larger bolt uses a spacer. I think that spacer is thicker than 1/4". I suppose if you had a 1/4" thick spacer you could add washers.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Transmission to Cross Support
Posted by: Timothy Shortle ()
Date: July 28, 2022 07:42PM

There were no shims used on LM Corvairs. Only used on earlies and FCs.

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Re: Transmission to Cross Support
Posted by: JimBrandberg ()
Date: July 28, 2022 07:50PM

Doesn't a 65 still have a spacer on the 7/16 side? I'm confused and unsure now.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Transmission to Cross Support
Posted by: vairmech ()
Date: July 29, 2022 05:16AM

JimBrandberg Wrote:
-------------------------------------------------------
> Doesn't a 65 still have a spacer on the 7/16 side? I'm confused and unsure now.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Yes, Spacer only!

Keep in mine that the 61-4 4 speeds all had the spacer but that is ONLY to make the mount flat. Any shims used for alignment need to be put in BOTH sides.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Transmission to Cross Support
Posted by: joelsplace ()
Date: July 30, 2022 06:58AM

Thanks for all the info. It needed about 5/16 so I just used washers. I could have sworn I had some transaxles with rhe bracket still on them but they were all either automatics or 66-69. I need to get better organized. I have to have one of those spacers somewhere.

Joel
Northlake, TX
5 Ultravans, 136 Corvairs and counting...

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